PCA9570GMH

## **PCA9570** 

## **Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

**Rev. 4 — 17 September 2014** 

## **Product data sheet** 

## **1. General description** 

The PCA9570 is a CMOS device that provides 4 bits of General Purpose parallel Output (GPO) expansion in low voltage processor and handheld battery powered mobile applications. It operates at 1 MHz I[2] C-bus speeds while maintaining backward compatibility to Fast-mode (400 kHz) and Standard-mode (100 kHz). 

The PCA9570 is a streamlined GPO that consists of 4-bit push-pull outputs that offer low current consumption, small packaging options and a low operating voltage range of 1.1 V to 3.6 V. The latched outputs are symmetrical 4 mA current drive capability at 3.3 V to drive various control logic. The PCA9570 output expander provides a simple solution when additional outputs are needed while keeping interconnections and floor space to a minimum, for example, in battery powered mobile applications where PCBs are crowded for interfacing to sensors, push buttons, etc. 

The PCA9570 contains an internal Power-On Reset (POR) and a Software Reset feature that initializes the device to its default state. 

## **2. Features and benefits** 

- 1 MHz I[2] C-bus interface with 6 mA SDA sink capability for lightly loaded buses (<100 pF) and improved power consumption 

- Compliant with the I[2] C-bus Fast and Standard modes 

- 1.1 V to 3.6 V operation 

- Latched outputs with a sink/source capability of 4 mA at 3.3 V 

- Readable device ID (manufacturer, device type, and revision) 

- Software Reset 

- Power-On Reset 

- Low standby current 

- 40 C to +85 C operation 

- ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101 

- Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA 

- Packages offered: TSSOP8, XQFN8 (0.4 mm lead pitch), XQFN8 (0.5 mm lead pitch) 

## **3. Applications** 

- Smart phones and tablets 

- Portable medical equipment 

- Portable instrumentation and test measurement 

**==> picture [172 x 101] intentionally omitted <==**

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **4. Ordering information** 

**Table 1. Ordering information** 

|**Type number**|**Topside**<br>**marking**|**Package**|**Package**|**Package**|
|---|---|---|---|---|
|||**Name**|**Description**|**Version**|
|PCA9570D~~P~~[1]|P9570|TSSOP8|plastic thin shrink small outline package; 8 leads;<br>body width 3 mm|SOT505-1|
|PCA9570GM~~4~~[1]|70|XQFN8|plastic, extremely thin quad flat package; no leads;<br>8 terminals; body 1.201.400.50 mm|SOT1309-1|
|PCA9570GM|P7X[2]|XQFN8|plastic, extremely thin quad flat package; no leads;<br>8 terminals; body 1.61.60.5 mm|SOT902-2|



[1] In development. Contact your NXP sales office for availability. 

[2] ‘X’ changes based on date code. 

## **4.1 Ordering options** 

## **Table 2. Ordering options** 

|**Type number**|**Orderable part**<br>**number**|**Package**|**Packing method**|**Minimum**<br>**order**<br>**quantity**|**Temperature**|
|---|---|---|---|---|---|
|PCA9570D~~P~~[1]|PCA9570DPJ|TSSOP8|Reel 13” Q1/T1<br>*Standard mark SMD|2500|Tamb=40C to +85C|
|PCA9570GM~~4~~[1]|PCA9570GM4H|XQFN8|Reel 7” Q3/T4<br>*Standard mark|4000|Tamb=40C to +85C|
|PCA9570GM|PCA9570GMH|XQFN8|Reel 7” Q3/T4<br>*Standard mark|4000|Tamb=40C to +85C|



[1] In development. Contact your NXP sales office for availability. 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. **Rev. 4 — 17 September 2014** 

**Product data sheet** 

**2 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **5. Block diagram** 

**==> picture [369 x 152] intentionally omitted <==**

**----- Start of picture text -----**<br>
PCA9570<br>SCL INPUT I [2] C-BUS SHIFT OUTPUT<br>FILTER CONTROL REGISTER 4 bits PORT P0 to P3<br>SDA<br>write pulse<br>read pulse<br>POWER-ON<br>VDD RESET<br>VSS<br>002aah230<br>**----- End of picture text -----**<br>


## **Fig 1. Block diagram of PCA9570** 

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**----- Start of picture text -----**<br>
VDD<br>IOH<br>write pulse<br>data from Shift Register D Q<br>FF<br>P0 to P3<br>CI IOL<br>S<br>power-on reset VSS<br>D Q<br>FF<br>read pulse CI<br>S<br>data to Shift Register 002aah231<br>**----- End of picture text -----**<br>


**Fig 2. Simplified schematic of the I/Os (P0 to P3)** 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. 

**Rev. 4 — 17 September 2014** 

**Product data sheet** 

**3 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **6. Pinning information** 

## **6.1 Pinning** 

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**----- Start of picture text -----**<br>
PCA9570GM4<br>terminal 1<br>index area<br>P0 2 8 SDA<br>P1 3 7 SCL<br>P0 1 8 VDD<br>P1 2 7 SDA P2 4 6 P3<br>PCA9570DP<br>P2 3 6 SCL<br>VSS 4 5 P3 002aag673<br>002aag827 Transparent top view<br>Fig 3. Pin configuration for TSSOP8 Fig 4. Pin configuration for XQFN8<br>PCA9570GM<br>terminal 1<br>index area<br>P0 1 7 SDA<br>P1 2 6 SCL<br>P2 3 5 P3<br>002aag941<br>Transparent top view<br>Fig 5. Pin configuration for XQFN8<br>DD<br>V<br>1<br>5<br>SS<br>V<br>DD<br>V<br>8<br>4<br>SS<br>V<br>**----- End of picture text -----**<br>


## **6.2 Pin description** 

## **Table 3. Pin description** 

|**Symbol**|**Pin**<br>|**Pin**<br>|**Description**|
|---|---|---|---|
||**XQFN8 (GM4)**|**TSSOP8,**<br>**XQFN8 (GM)**||
|VDD|1|8<br>|supply voltage|
|P0|2|1<br>|input/output 0|
|P1|3|2<br>|input/output 1|
|P2|4|3<br>|input/output 2|
|VSS|5|4<br>|supply ground|
|P3|6|5<br>|input/output 3|
|SCL|7|6<br>|serial clock line|
|SDA|8|7<br>|serial data line|



All information provided in this document is subject to legal disclaimers. 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 **Product data sheet** 

**Rev. 4 — 17 September 2014** 

**4 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **7. Functional description** 

“ ” Refer to Figure 1 Block diagram of PCA9570 . 

## **7.1 Device address** 

Following a START condition, the bus master must send the address of the slave it is accessing and the operation it wants to perform (read or write). The address of the PCA9570 is 48h as shown in Figure 6. 

**==> picture [140 x 52] intentionally omitted <==**

**----- Start of picture text -----**<br>
slave address<br>0 1 0 0 1 0 0 R/W<br>fixed<br>002aag831<br>**----- End of picture text -----**<br>


**Fig 6. PCA9570 device address** 

## **7.2 Software Reset Call, and device ID addresses** 

Two other different addresses can be sent to the device. 

- General Call address: allows resetting the device through the I[2] C-bus upon reception of the right I[2] C-bus sequence. See Section 7.2.1 “Software Reset” for more information. 

- Device ID address: allows reading ID information from the device (manufacturer, part identification, revision). See Section 7.2.2 “Device ID (PCA9570 ID field)” for more information. 

**==> picture [396 x 82] intentionally omitted <==**

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R/W<br>0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 R/W<br>002aac115 002aac116<br>Fig 7. General Call address Fig 8. Device ID address<br>**----- End of picture text -----**<br>


© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. **Rev. 4 — 17 September 2014** 

**Product data sheet** 

**5 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **7.2.1 Software Reset** 

The Software Reset Call allows all the devices in the I[2] C-bus to be reset to the power-up state value through a specific formatted I[2] C-bus command. To be performed correctly, it implies that the I[2] C-bus is functional and that there is no device hanging the bus. 

The Software Reset sequence is defined as following: 

1. A START command is sent by the I[2] C-bus master. 

2. The reserved General Call I[2] C-bus address ‘0000 000’ with the R/W bit set to 0 (write) is sent by the I[2] C-bus master. 

3. The device acknowledges after seeing the General Call address ‘0000 0000’ (00h) only. If the R/W bit is set to 1 (read), no acknowledge is returned to the I[2] C-bus master. 

4. Once the General Call address has been sent and acknowledged, the master sends 1 byte. The value of the byte must be equal to 06h. 

   - a. The device acknowledges this value only. If the byte is not equal to 06h, the device does not acknowledge it. 

If more than 1 byte of data is sent, the device does not acknowledge any more. 

5. Once the right byte has been sent and correctly acknowledged, the master sends a STOP command to end the Software Reset sequence: the device then resets to the default value (power-up value) and is ready to be addressed again within the specified bus free time. If the master sends a Repeated START instead, no reset is performed. 

The I[2] C-bus master must interpret a non-acknowledge from the device (at any time) as a ‘Software Reset Abort’. The device does not initiate a reset of its registers. 

The unique sequence that initiates a Software Reset is described in Figure 9. 

**==> picture [320 x 120] intentionally omitted <==**

**----- Start of picture text -----**<br>
SWRST Call I [2] C-bus address SWRST data = 06h<br>S 0 0 0 0 0 0 0 0 A 0 0 0 0 0 1 1 0 A P<br>START condition R/W acknowledge<br>from slave(s)<br>acknowledge<br>from slave(s)<br>PCA9570/PCA9571 is(are) reset.<br>Registers are set to default power-up values.<br>002aag882<br>Fig 9. Software Reset sequence<br>**----- End of picture text -----**<br>


© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. 

**Rev. 4 — 17 September 2014** 

**Product data sheet** 

**6 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **7.2.2 Device ID (PCA9570 ID field)** 

The Device ID field is a 3 byte read-only (24 bits) word giving the following information: 

- 12 bits with the manufacturer name, unique per manufacturer (for example, NXP). 

- 9 bits with the part identification, assigned by manufacturer, the 7 MSBs with the category ID and the 6 LSBs with the feature ID (for example PCA9570 4-bit I/O expander). 

- 3 bits with the die revision, assigned by manufacturer (for example, Rev X). 

The Device ID is read-only, hardwired in the device and can be accessed as follows: 

1. START command 

2. The master sends the Reserved Device ID I[2] C-bus address followed by the R/W bit set to 0 (write): ‘1111 1000’. 

3. The master sends the I[2] C-bus slave address of the slave device it needs to identify. The LSB is a ‘Don’t care’ value. Only one device must acknowledge this byte (the one that has the I[2] C-bus slave address). 

4. The master sends a Re-START command. 

**Remark:** A STOP command followed by a START command resets the slave state machine and the Device ID read cannot be performed. Also, a STOP command or a Re-START command followed by an access to another slave device resets the slave state machine and the Device ID Read cannot be performed. 

5. The master sends the Reserved Device ID I[2] C-bus address followed by the R/W bit set to 1 (read): ‘1111 1001’. 

6. The Device ID Read can be done, starting with the 12 manufacturer bits (first byte + 4 MSB of the second byte), followed by the 9 part identification bits (4 LSBs of the second byte + 5 MSBs of the third byte), and then the 3 die revision bits (3 LSBs of the third byte). 

7. The master ends the reading sequence by NACKing the last byte, thus resetting the slave device state machine and allowing the master to send the STOP command. 

**Remark:** The reading of the Device ID can be stopped anytime by sending a NACK command. 

If the master continues to ACK the bytes after the third byte, the slave rolls back to the first byte and keeps sending the Device ID sequence until a NACK has been detected. 

For the PCA9570, the Device ID is as shown in Figure 10. 

**==> picture [250 x 81] intentionally omitted <==**

**----- Start of picture text -----**<br>
manufacturer 0 0 0 0 0 0 0 0 0 0 0 0<br>part identification 1 0 0 0 0 0 0 0 0<br>revision 0 0 0<br>002aag791<br>**----- End of picture text -----**<br>


**Fig 10. PCA9570 Device ID field** 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

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**Rev. 4 — 17 September 2014** 

**Product data sheet** 

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**PCA9570** 

**NXP Semiconductors** 

## **Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

**==> picture [448 x 207] intentionally omitted <==**

**----- Start of picture text -----**<br>
acknowledge from  acknowledge from acknowledge from<br>one or several slaves I [2] C-bus slave address slave to be identified slave to be identified<br>Device ID address of the device to be identified Device ID address<br>S 1 1 1 1 1 0 0 0 A A6 A5 A4 A3 A2 A1 A0 x A Sr 1 1 1 1 1 0 0 1 A<br>START condition R/W don’t care repeated START R/W<br>condition<br>acknowledge acknowledge no acknowledge<br>from master from master from master<br>M M<br>[M8] [M7] [M6] [M5] [M4] A M3 M2 M1 M0 P8 P7 P6 P5 A P4 P3 P2 P1 P0 R2 R1 R0 A P<br>11 10 [M9]<br>STOP condition<br>manufacturer name = 000000000000 part identification = 100000000 revision = 000<br>002aah310<br>If more than 3 bytes are read, the slave device loops back to the first byte (manufacturer byte) and keeps sending data until the<br>master generates a ‘no acknowledge’.<br>**----- End of picture text -----**<br>


**Fig 11. Device ID field reading** 

## **8. I/O programming** 

## **8.1 I/O architecture** 

The device ports (see Figure 2) are entirely independent and are output ports. The state of the ports at the pin is transferred from the ports to the microcontroller in the Read mode (see Figure 13). Output data is transmitted to the ports in the Write mode (see Figure 12). 

At power-on all ports are HIGH. The state of the Output Port register determines if either Q1 or Q2 is on, driving the line either HIGH or LOW. A bit set to 1 in the data byte drives the line HIGH at the corresponding port. A bit set to 0 in the data byte drives the line LOW at the corresponding port. 

If an external voltage is applied to an output, care should be exercised because of the low-impedance path that exists between the pin and either VDD or VSS. 

## **8.2 Writing to the port (Output mode)** 

To write, the master (microcontroller) first addresses the slave device. By setting the last bit of the byte containing the slave address to logic 0, the Write mode is entered. The device acknowledges and the master sends the data byte for P7 to P0 and is acknowledged by the device. Writes to P7 to P4 are ignored in the PCA9570 as only P3 through P0 are available. The 4-bit data is presented on the port lines after it has been acknowledged by the device. The number of data bytes that can be sent successively is not limited. The previous data is overwritten every time a data byte has been sent. 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

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**Rev. 4 — 17 September 2014** 

**Product data sheet** 

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**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

**==> picture [439 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
SCL 1 2 3 4 5 6 7 8 9<br>slave address data 1 data 2<br>SDA S A6 A5 A4 A3 A2 A1 A0 0 A P7 P6 P5 P4 P3 1 P1 P0 A P7 P6 P5 P4 P3 0 P1 P0 A<br>START condition R/W P2 P2 acknowledge<br>acknowledge acknowledge from slave<br>from slave from slave<br>write to port<br>tv(Q) tv(Q)<br>data output from port DATA 1 VALID DATA 2 VALID<br>P2 output voltage<br>002aag833<br>**----- End of picture text -----**<br>


## **Fig 12. Write mode (output)** 

## **8.3 Reading from a port (Input mode)** 

All ports are outputs and cannot be used as inputs. When reading the device, the data returned is the port state at the pin. To read, the master (microcontroller) first addresses the slave device by setting the last bit of the byte containing the slave address to logic 1. The data byte that follows on the SDA is the value of the ports pins. There is no limit to the number of bytes read, and the state of the output port pins is updated at each acknowledge cycle. Logic 1 means that the port is HIGH. Logic 0 means that the port is LOW. When the PCA9570 is read, P7 through P4 return logic ‘1’. 

**==> picture [433 x 103] intentionally omitted <==**

**----- Start of picture text -----**<br>
no acknowledge<br>from master<br>slave address data from port data from port<br>SDA S A6 A5 A4 A3 A2 A1 A0 1 A DATA 1 A DATA 4 1 P<br>START condition R/W acknowledge acknowledge STOP<br>from slave from master condition<br>read from<br>port<br>002aag846<br>**----- End of picture text -----**<br>


**Fig 13. Read input port register** 

## **8.4 Power-on reset** 

When power is applied to VDD, an internal Power-On Reset (POR) holds the device in a reset condition until VDD has reached VPOR. At that point, the reset condition is released and the device registers and I[2] C-bus/SMBus state machine initialize to their default states. See Section 14 for DC and AC characteristics of the POR function. 

All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

**Rev. 4 — 17 September 2014** 

**Product data sheet** 

**9 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **9. Application design-in information** 

## **9.1 I/O expander applications** 

Figure 14 shows a 4-bit output expander application. The desired HIGH or LOW logic levels are controlled by the master with speeds of up to 1 MHz on a lightly loaded bus (<100 pF). This allows the host processor to control various functions quickly and with very low overhead. The port read function of the device enables the host processor to poll the status of the output port pins. This is useful for system recovery operations or debugging. 

**==> picture [266 x 74] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.8 V<br>1.8 V<br>SDA P0 GPS enable<br>CORE SCL P1 vibrator control<br>PROCESSOR P2 latch control<br>P3 switch control<br>002aah232<br>**----- End of picture text -----**<br>


**Fig 14. I/O expander application** 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. 

**Rev. 4 — 17 September 2014** 

**Product data sheet** 

**10 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **10. Limiting values** 

## **Table 4. Limiting values** 

_In accordance with the Absolute Maximum Rating System (IEC 60134)._ 

|**Symbol**|**Parameter**|**Conditions**|**Min**|**Max**|**Unit**|
|---|---|---|---|---|---|
|VDD|supply voltage||0.5|+4|V|
|VI|input voltage|SCL; SDA<br>[1]|0.5|+4|V|
|IIK|input clamping current|SCL; VI< 0 V|-|18|mA|
|IOK|output clamping current|P port; VO< 0 V or VO> VDD|-|18|mA|
|||SDA; VO< 0 V or VO> VDD|-|18|mA|
|IO|output current|continuous; P port|-|25|mA|
|IOL|LOW-level output current|continuous; SDA; VO= 0 V to VDD|-|25|mA|
|IDD|supply current|continuous through VSS|-|100|mA|
|Tstg|storage temperature||65|+150|C|
|Tj|junction temperature||-|125|C|



[1] If the input and output current ratings are observed, the input negative-voltage and output voltage ratings may be exceeded 

## **11. Thermal characteristics** 

## **Table 5. Thermal characteristics** 

|**Symbol**|**Parameter**|**Conditions**|**Max**|**Unit**|
|---|---|---|---|---|
|Zth(j-a)|transient thermal impedance<br>from junction to ambient|TSSOP8 (SOT505-1)<br>[1]|88|K/W|
|||XQFN8 (SOT1039-1)<br>[1]|66|K/W|
|||XQFN8 (SOT902-2)<br>[1]|62|K/W|



[1] The package thermal impedance is calculated in accordance with JESD 51-7. 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. 

**Rev. 4 — 17 September 2014** 

**Product data sheet** 

**11 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **12. Static characteristics** 

**Table 6. Static characteristics** _Tamb =_  _40_  _C to +85_  _C; VDD = 1.1 V to 3.6 V; unless otherwise specified._ 

|**Symbol**|**Parameter**|**Conditions**|**Min**|**Ty**~~**p**~~**[1]**|**Max**|**Unit**|
|---|---|---|---|---|---|---|
|VIK|input clamping voltage|II=18 mA|1.2|-|-|V|
|VDD|supply voltage||1.1|-|3.6|V|
|VPOR|power-on reset voltage|VI= VDDor VSS; IO= 0 mA|-|0.7|1.0|V|
|VOL|LOW-level output voltage|P port; IOL= 2 mA; VDD= 1.65 V|-|-|0.25|V|
|||P port; IOL= 3 mA; VDD= 2.3 V|-|-|0.25|V|
|||P port; IOL= 4 mA; VDD= 3 V|-|-|0.25|V|
|VOH|HIGH-level output voltage|P port; IOH= 2 mA; VDD= 1.65 V|1.35|-|-|V|
|||P port; IOH= 3 mA; VDD= 2.3 V|2.0|-|-|V|
|||P port; IOH= 4 mA; VDD= 3 V|2.7|-|-|V|
|IOL|LOW-level output current|SDA; VOL= 0.4 V; VDD= 2.1 V to 3.6 V|3|-|-|mA|
|||SDA; VOL= 0.2VDD; VDD= 1.1 V to 2.0 V|1|-|-|mA|
|VIH|HIGH-level input voltage|SCL, SDA; VDD= 1.1 V to 1.2 V|0.8VDD|-|1.2|V|
|||SCL, SDA; VDD= 1.2 V to 3.6 V|0.7VDD|-|3.6|V|
|VIL|LOW-level input voltage|SCL, SDA; VDD= 1.1 V to 1.2 V|0.5|-|0.2VDD|V|
|||SCL, SDA; VDD= 1.2 V to 3.6 V|0.5|-|0.3VDD|V|
|II|input current|SCL, SDA; VDD= 1.1 V to 3.6 V;<br>VI= VDDor VSS|-|-|1|A|
|IDD|supply current|SDA, P port; VIon SDA = VDDor VSS;<br>IO= 0 mA; fSCL= 400 kHz|||||
|||VDD= 2.3 V to 3.6 V|-|6.5|15|A|
|||VDD= 1.1 V to 2.3 V|-|4|9|A|
|||SCL, SDA, P port;<br>VIon SCL, SDA = VDDor VSS;<br>IO= 0 mA; fSCL= 0 kHz|||||
|||VDD= 2.3 V to 3.6 V|-|1|3.2|A|
|||VDD= 1.1 V to 2.3 V|-|0.6|1.7|A|
|||Active mode: SCL, SDA, P port; IO= 0 mA;<br>fSCL= 400 kHz; continuous register read|||||
|||VDD= 1.1 V to 2.3 V|-|50|75|A|
|Ci|input capacitance|VI= VDDor VSS|-|6|7|pF|
|Co|output capacitance|VO= VDDor VSS|-|3|5|pF|
|Tamb|ambient temperature|operating in free air|40|-|+85|C|



[1] The typical values are at VDD = 2.2 V and Tamb = 25 C. 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. 

**Rev. 4 — 17 September 2014** 

**Product data sheet** 

**12 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **12.1 Typical characteristics** 

**==> picture [497 x 394] intentionally omitted <==**

**----- Start of picture text -----**<br>
aaa-011393 aaa-011394<br>12 120<br>(μA)IDD V DD  = 3.6 V IDD(stb)(nA) V DD  = 3.6 V3.3 V<br>3.3 V<br>2.5 V<br>8 2.5 V 80 1.8 V<br>1.8 V<br>1.1 V<br>1.1 V<br>4 40<br>0 0<br>−40 −15 10 35 60 85 −40 −15 10 35 60 85<br>Tamb (°C) Tamb (°C)<br>Fig 15. Supply current versus ambient temperature Fig 16. Standby supply current versus<br>ambient temperature<br>aaa-011395<br>10<br>IDD<br>(μA)<br>8<br>6<br>4<br>2<br>1<br>1.1 1.8 2.5 3.3 3.6<br>VDD (V)<br>Tamb = 25 C<br>Fig 17. Supply current versus supply voltage<br>**----- End of picture text -----**<br>


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**==> picture [481 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
aaa-011487 aaa-011488<br>8 18<br>Isink Tamb = −40 °C 25 °C (mA)Isink<br>(mA) 85 °C Tamb = −40 °C<br>6 25 °C<br>85 °C<br>12<br>4<br>6<br>2<br>0 0<br>0 0.2 0.4 0.6 0 0.2 0.4 0.6<br>VOL (V) VOL (V)<br>**----- End of picture text -----**<br>


## a. VDD = 1.2 V 

## b. VDD = 1.8 V 

**==> picture [481 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
aaa-011489 aaa-011490<br>30 36<br>Isink<br>Isink Tamb = −40 °C (mA)<br>(mA) 25 °C<br>85 °C Tamb = -40 °C<br>20 24 25 °C<br>85 °C<br>10 12<br>0 0<br>0 0.2 0.4 0.6 0 0.2 0.4 0.6<br>VOL (V) VOL (V)<br>**----- End of picture text -----**<br>


c. VDD = 2.5 V 

d. VDD = 3.3 V 

**Fig 18. I/O sink current versus LOW-level output voltage** 

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**==> picture [481 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
aaa-011563 aaa-011564<br>6 14<br>Isource<br>Isource(mA) Tamb = −40  25 °C° C (mA) 12 Tamb = −40 °C25 °C85 °C<br>85 °C 10<br>4<br>8<br>6<br>2<br>4<br>2<br>0 0<br>0 0.2 0.4 0.6 0 0.2 0.4 0.6<br>VDD − VOH (V) VDD − VOH (V)<br>**----- End of picture text -----**<br>


## a. VDD = 1.2 V 

## b. VDD = 1.8 V 

**==> picture [481 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
aaa-011565 aaa-011566<br>25 36<br>Isource<br>(mA) Isource<br>20 Tamb = −40 °C (mA) Tamb = −40 °C<br>25 °C<br>25 °C° 24 85 °C<br>15 85  C<br>10<br>12<br>5<br>0 0<br>0 0.2 0.4 0.6 0 0.2 0.4 0.6<br>VDD − VOH (V) VDD − VOH (V)<br>**----- End of picture text -----**<br>


c. VDD = 2.5 V 

## d. VDD = 3.3 V 

**Fig 19. I/O source current versus HIGH-level output voltage** 

**==> picture [233 x 149] intentionally omitted <==**

**----- Start of picture text -----**<br>
aaa-011567<br>60<br>VOL<br>(mV)<br>(1)<br>40<br>20<br>(2)<br>0<br>−40 −15 10 35 60 85<br>Tamb (°C)<br>**----- End of picture text -----**<br>


(1) VDD = 1.8 V; Isink = 2 mA 

- (2) VDD = 1.8 V; Isink = 100 A 

**Fig 20. LOW-level output voltage versus temperature** 

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## **13. Dynamic characteristics** 

## **Table 7. Dynamic characteristics** 

_VDD = 1.1 V to 3.6 V; VSS = 0 V; Tamb =_  _40_  _C to +85_  _C; unless otherwise specified._ 

|**Symbol**|**Parameter**|**Conditions**|**Standard mode**<br>**I2C-bus**|**Standard mode**<br>**I2C-bus**|**Fast mode**<br>**I2C-bus**|**Fast mode**<br>**I2C-bus**|**1 MHz**<br>**I2C-bu**~~**s**~~**[1]**|**1 MHz**<br>**I2C-bu**~~**s**~~**[1]**|**Unit**|
|---|---|---|---|---|---|---|---|---|---|
||||**Min**|**Max**|**Min**|**Max**|**Min**|**Max**||
|fSCL|SCL clock frequency||0|100|0|400|0|1000|kHz|
|tBUF|bus free time between a<br>STOP and<br>START condition||4.7|-|1.3|-|0.5|-|s|
|tHD;STA|hold time (repeated)<br>START condition||4.0|-|0.6|-|0.26|-|s|
|tSU;STA|set-up time for a repeated<br>START condition||4.7|-|0.6|-|0.26|-|s|
|tSU;STO|set-up time for<br>STOP condition||4.0|-|0.6|-|0.26|-|s|
|tHD;DAT|data hold time||0|-|0|-|0|-|ns|
|tVD;ACK|data valid acknowledge<br>time|[2]|-|3.45|-|0.9|-|0.45|s|
|tVD;DAT|data valid time|[3]|-|3.45|-|0.9|-|0.45|s|
|tSU;DAT|data set-up time||250|-|100|-|50|-|ns|
|tLOW|LOW period of the<br>SCL clock||4.7|-|1.3|-|0.5|-|s|
|tHIGH|HIGH period of the<br>SCL clock||4.0|-|0.6|-|0.26|-|s|
|tf|fall time of both SDA and<br>SCL signals||-|300|20<br>(VDD/ 5.5 V)|300|20<br>(VDD/ 5.5 V)|120|ns|
|tr|rise time of both SDA and<br>SCL signals||-|1000|20|300|-|120|ns|
|tSP|pulse width of spikes that<br>must be suppressed by<br>the input filter|[4]|-|50|-|50|-|50|ns|
|**Port timing**||||||||||
|tv(Q)|data output valid time||-|200|-|200|-|200|ns|



[1] Fm+ mode on a non-standard, lightly loaded bus (<100 pF). 

[2] tVD;ACK = time for Acknowledgement signal from SCL LOW to SDA (out) LOW. 

[3] tVD;DAT = minimum time for SDA data out to be valid following SCL LOW. 

[4] Input filters on the SDA and SCL inputs suppress noise spikes less than 50 ns. 

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## **14. Power-on reset requirements** 

In the event of a glitch or data corruption, the device can be reset to its default conditions by using the power-on reset feature. Power-on reset requires that the device go through a power cycle to be completely reset. This reset also happens when the device is powered on for the first time in an application. 

**==> picture [380 x 111] intentionally omitted <==**

**----- Start of picture text -----**<br>
VDD<br>ramp-up ramp-down re-ramp-up<br>td(rst)<br>time<br>(dV/dt)r (dV/dt)f time to re-ramp (dV/dt)r<br>when VDD drops to VSS 002aah307<br>Fig 21. VDD is lowered below 0.6 V and then ramped up to VDD<br>**----- End of picture text -----**<br>


**Table 8. Recommended supply sequencing and ramp rates** _Tamb = 25_  _C (unless otherwise noted). Not tested; specified by design._ 

|**Symbol**|**Parameter**|**Condition**|**Min**|**Typ**|**Max**|**Unit**|
|---|---|---|---|---|---|---|
|(dV/dt)f|fall rate of change of voltage|Figure 21|0.1|-|2000|ms|
|(dV/dt)r|rise rate of change of voltage|Figure 21|0.1|-|2000|ms|
|td(rst)|reset delay time|Figure 21<br>; when VDDdrops to VSS|1|-|-|s|
|VDD(gl)|glitch supply voltage difference|Figure 22<br>[1]|||||
|||VDD= 2.1 V to 3.6 V|-|-|1.2|V|
|||VDD= 1.1 V to 2.1 V|-|-|VDD0.9|V|
|tw(gl)VDD|supply voltage glitch pulse width|Figure 22<br>[2]|-|-|10|s|
|VPOR(trip)|power-on reset trip voltage|rising VDD|-|0.7|1.0|V|



[1] Level that VDD can glitch down to with a ramp rate of 0.4 s/V, but not cause a functional disruption when tgw(VDD) = 1 s. 

[2] Glitch width that does not cause a functional disruption when VDD = 1.8 V to 3.6 V, VDD(gl) = 0.5  VDD; VDD = 1.1 V to 1.8 V, VDD(gl) = VDD  0.9 V. 

Glitches in the power supply can also affect the power-on reset performance of this device. The glitch width (tw(gl)VDD) and glitch height (VDD(gl)) are dependent on each other. The bypass capacitance, source impedance, and device impedance are factors that affect power-on reset performance. Figure 22 and Table 8 provide more information on how to measure these specifications. 

**==> picture [358 x 91] intentionally omitted <==**

**----- Start of picture text -----**<br>
VDD<br>∆VDD(gl)<br>time<br>tw(gl)VDD 002aah309<br>Fig 22. Glitch width and glitch height<br>**----- End of picture text -----**<br>


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VPOR is critical to the power-on reset. VPOR is the voltage level at which the reset condition is released and all the registers and the I[2] C-bus/SMBus state machine are initialized to their default states. Figure 23 and Table 8 provide more details on this specification. 

**==> picture [298 x 156] intentionally omitted <==**

**----- Start of picture text -----**<br>
VDD<br>VPOR (rising VDD)<br>time<br>POR<br>time<br>002aah096<br>Fig 23. Power-on reset voltage (VPOR)<br>**----- End of picture text -----**<br>


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## **15. Parameter measurement information** 

**==> picture [425 x 332] intentionally omitted <==**

**----- Start of picture text -----**<br>
VDD<br>RL = 1 kΩ<br>SDA<br>DUT<br>CL = 50 pF<br>002aag803<br>SDA load configuration<br>two bytes for read Input port register [(1)]<br>STOP START Address Address R/W ACK Data Data STOP<br>condition condition Bit 7 Bit 1 Bit 0 (A) Bit 7 Bit 0 condition<br>(P) (S) (MSB) (LSB) (MSB) (LSB) (P)<br>002aag952<br>Transaction format<br>tLOW tHIGH tSP<br>0.7 × VDD<br>SCL<br>0.3 × VDD<br>tBUF tr tf tVD;DATtf(o) tVD;ACK tSU;STA tSU;STO<br>0.7 × VDD<br>SDA<br>0.3 × VDD<br>tf tr tVD;ACK<br>tHD;STA tSU;DAT tHD;DAT<br>repeat START condition<br>STOP condition<br>002aag804<br>**----- End of picture text -----**<br>


## a. SDA load configuration 

## b. Transaction format 

## c. Voltage waveforms 

CL includes probe and jig capacitance. 

All inputs are supplied by generators having the following characteristics: PRR  10 MHz; Zo = 50 ; tr/tf  30 ns. All parameters and waveforms are not applicable to all devices. 

Byte 1 = I[2] C-bus address; Byte 2, byte 3 = P port data. 

(1) See Figure 13. 

**Fig 24. I[2] C-bus interface load circuit and voltage waveforms** 

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## **Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

**==> picture [265 x 360] intentionally omitted <==**

**----- Start of picture text -----**<br>
Pn 500 Ω<br>DUT 2 × VDD<br>CL = 50 pF 500 Ω<br>002aag805<br>0.7 × VDD<br>SCL P0 A P7<br>0.3 × VDD<br>SDA<br>tv(Q)<br>Pn<br>unstable last stable bit<br>data<br>002aag806<br>= 0)<br>0.7 × VDD<br>SCL P0 A P7<br>0.3 × VDD<br>tsu(D) th(D)<br>Pn<br>002aag807<br>**----- End of picture text -----**<br>


## a. P port load configuration 

## b. Write mode (R/W = 0) 

## c. Read mode (R/W = 1) 

CL includes probe and jig capacitance. 

tv(Q) is measured from 0.7  VDD on SCL to 50 % I/O (Pn) output. 

All inputs are supplied by generators having the following characteristics: PRR  10 MHz; Zo = 50 ; tr/tf  30 ns. The outputs are measured one at a time, with one transition per measurement. 

All parameters and waveforms are not applicable to all devices. 

## **Fig 25. P port load circuit and voltage waveforms** 

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## **16. Package outline** 

**==> picture [193 x 9] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig 26. Package outline SOT505-1 (TSSOP8)<br>**----- End of picture text -----**<br>


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## **Fig 27. Package outline SOT1309-1 (XQFN8)** 

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**==> picture [187 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fig 28. Package outline SOT902-2 (XQFN8)<br>**----- End of picture text -----**<br>


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## **17. Handling information** 

All input and output pins are protected against ElectroStatic Discharge (ESD) under normal handling. When handling ensure that the appropriate precautions are taken as described in _JESD625-A_ or equivalent standards. 

## **18. Soldering of SMD packages** 

This text provides a very brief insight into a complex technology. A more in-depth account of soldering ICs can be found in Application Note _AN10365 “Surface mount reflow soldering description”_ . 

## **18.1 Introduction to soldering** 

Soldering is one of the most common methods through which packages are attached to Printed Circuit Boards (PCBs), to form electrical circuits. The soldered joint provides both the mechanical and the electrical connection. There is no single soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and Surface Mount Devices (SMDs) are mixed on one printed wiring board; however, it is not suitable for fine pitch SMDs. Reflow soldering is ideal for the small pitches and high densities that come with increased miniaturization. 

## **18.2 Wave and reflow soldering** 

Wave soldering is a joining technology in which the joints are made by solder coming from a standing wave of liquid solder. The wave soldering process is suitable for the following: 

- Through-hole components 

- Leaded or leadless SMDs, which are glued to the surface of the printed circuit board 

Not all SMDs can be wave soldered. Packages with solder balls, and some leadless packages which have solder lands underneath the body, cannot be wave soldered. Also, leaded SMDs with leads having a pitch smaller than ~0.6 mm cannot be wave soldered, due to an increased probability of bridging. 

The reflow soldering process involves applying solder paste to a board, followed by component placement and exposure to a temperature profile. Leaded packages, packages with solder balls, and leadless packages are all reflow solderable. 

Key characteristics in both wave and reflow soldering are: 

- Board specifications, including the board finish, solder masks and vias 

- Package footprints, including solder thieves and orientation 

- The moisture sensitivity level of the packages 

- Package placement 

- Inspection and repair 

- Lead-free soldering versus SnPb soldering 

## **18.3 Wave soldering** 

Key characteristics in wave soldering are: 

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- Process issues, such as application of adhesive and flux, clinching of leads, board transport, the solder wave parameters, and the time during which components are exposed to the wave 

- Solder bath specifications, including temperature and impurities 

## **18.4 Reflow soldering** 

Key characteristics in reflow soldering are: 

- Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to higher minimum peak temperatures (see Figure 29) than a SnPb process, thus reducing the process window 

- Solder paste printing issues including smearing, release, and adjusting the process window for a mix of large and small components on one board 

- Reflow temperature profile; this profile includes preheat, reflow (in which the board is heated to the peak temperature) and cooling down. It is imperative that the peak temperature is high enough for the solder to make reliable solder joints (a solder paste characteristic). In addition, the peak temperature must be low enough that the packages and/or boards are not damaged. The peak temperature of the package depends on package thickness and volume and is classified in accordance with Table 9 and 10 

## **Table 9. SnPb eutectic process (from J-STD-020D)** 

|**Package thickness (mm)**|**Package reflow temperature (****C)**|**Package reflow temperature (****C)**|
|---|---|---|
||**Volume (mm3)**||
||**< 350**|**350**|
|< 2.5|235|220|
|2.5|220|220|



## **Table 10. Lead-free process (from J-STD-020D)** 

|**Package thickness (mm)**|**Package reflow temperature (****C)**|**Package reflow temperature (****C)**|**Package reflow temperature (****C)**|
|---|---|---|---|
||**Volume (mm3)**|||
||**< 350**|**350 to 2000**|**> 2000**|
|< 1.6|260|260|260|
|1.6 to 2.5|260|250|245|
|> 2.5|250|245|245|



Moisture sensitivity precautions, as indicated on the packing, must be respected at all times. 

Studies have shown that small packages reach higher temperatures during reflow soldering, see Figure 29. 

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**==> picture [351 x 223] intentionally omitted <==**

**----- Start of picture text -----**<br>
maximum peak temperature<br>= MSL limit, damage level<br>temperature<br>minimum peak temperature<br>= minimum soldering temperature<br>peak<br> temperature<br>RTD \<br>time<br>001aac844<br>MSL: Moisture Sensitivity Level<br>Fig 29. Temperature profiles for large and small components<br>**----- End of picture text -----**<br>


For further information on temperature profiles, refer to Application Note _AN10365 “Surface mount reflow soldering description”_ . 

## **19. Soldering: PCB footprints** 

**Fig 30. PCB footprint for SOT505-1 (TSSOP8); reflow soldering** 

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## **Fig 31. PCB footprint for SOT1309-1 (XQFN8); reflow soldering** 

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## **Fig 32. PCB footprint for SOT902-2 (XQFN8); reflow soldering** 

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## **20. Abbreviations** 

## **Table 11. Abbreviations** 

|**Acronym**|**Description**|
|---|---|
|CDM|Charged-Device Model|
|ESD|ElectroStatic Discharge|
|FM|Frequency Modulation|
|GPIO|General Purpose Input/Output|
|GPS|Global Positioning Satellite|
|HBM|Human Body Model|
|I2C-bus|Inter-Integrated Circuit bus|
|I/O|Input/Output|
|IC|Integrated Circuit|
|ID|Identification|
|LED|Light Emitting Diode|
|LSB|Least Significant Bit|
|MP3|MPEG audio layer 3|
|MSB|Most Significant Bit|
|SMBus|System Management Bus|



## **21. Revision history** 

## **Table 12. Revision history** 

|**Document ID**|**Release date**|**Data sheet status**|**Change notice**|**Supersedes**|
|---|---|---|---|---|
|PCA9570 v.4|20140917|Product data sheet|-|PCA9570 v.3|
|Modifications:|**•** Table 1“<br>Ordering information<br>”<br>:Added table note [1]<br>~~.~~<br>**•** Table 2“<br>Ordering options<br>”<br>:Added table note [1]<br>~~.~~<br>**•** Table 4“<br>Limiting values<br>”<br>,IDD; changed max from “200” to “100”.<br>**•** Section 14“<br>Power-on reset requirements<br>”<br>:Deleted paragraphs 2 and 3; deleted Fig 22.<br>**•** Table 8“<br>Recommended supply sequencing and ramp rates<br>”<br>:<br>**–**<br>td(rst): Deleted 2nd row<br>**–**<br>VDD(gl): Changed VDDcondition from “1.8 V” to “2.1 V”||||
|PCA9570 v.3|20140515|Product data sheet|-|PCA9570 v.2|
|PCA9570 v.2|20140204|Product data sheet|-|PCA9570 v.1|
|PCA9570 v.1|20130910|Product data sheet|-|-|



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## **22. Legal information** 

## **22.1 Data sheet status** 

|**Document status[1]**<br>**[2]**|**Product statu**~~**s**~~**[3]**|**Definition**|
|---|---|---|
|Objective [short] data sheet|Development|This document contains data from the objective specification for product development.|
|Preliminary [short] data sheet|Qualification|This document contains data from the preliminary specification.|
|Product [short] data sheet|Production|This document contains the product specification.|



[1] Please consult the most recently issued document before initiating or completing a design. 

[2] The term ‘short data sheet’ is explained in section “Definitions”. 

[3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com. 

## **22.2 Definitions** 

**Suitability for use —** NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors and its suppliers accept no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. 

**Draft —** The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. 

**Short data sheet —** A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. 

**Applications —** Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. 

Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. 

**Product specification —** The information and data provided in a Product data sheet shall define the specification of the product as agreed between NXP Semiconductors and its customer, unless NXP Semiconductors and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the NXP Semiconductors product is deemed to offer functions and qualities beyond those described in the Product data sheet. 

NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). NXP does not accept any liability in this respect. 

## **22.3 Disclaimers** 

**Limited warranty and liability —** Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. NXP Semiconductors takes no responsibility for the content in this document if provided by an information source outside of NXP Semiconductors. 

**Limiting values —** Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. 

In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. 

**Terms and conditions of commercial sale —** NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NXP Semiconductors hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of NXP Semiconductors products by customer. 

Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the _Terms and conditions of commercial sale_ of NXP Semiconductors. 

**Right to make changes —** NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. 

**No offer to sell or license —** Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. 

**Rev. 4 — 17 September 2014** 

**Product data sheet** 

**30 of 32** 

**PCA9570** 

**NXP Semiconductors** 

## **Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

**Export control —** This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. 

**Non-automotive qualified products —** Unless this data sheet expressly states that this specific NXP Semiconductors product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. NXP Semiconductors accepts no liability for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. 

In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without NXP Semiconductors’ warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for automotive applications beyond NXP Semiconductors’ specifications such use shall be solely at customer’s 

own risk, and (c) customer fully indemnifies NXP Semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NXP Semiconductors’ standard warranty and NXP Semiconductors’ product specifications. 

**Translations —** A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions. 

## **22.4 Trademarks** 

Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. **I[2] C-bus  —** logo is a trademark of NXP Semiconductors N.V. 

## **23. Contact information** 

For more information, please visit: **http://www.nxp.com** 

For sales office addresses, please send an email to: **salesaddresses@nxp.com** 

© NXP Semiconductors N.V. 2014. All rights reserved. 

PCA9570 

All information provided in this document is subject to legal disclaimers. 

**Rev. 4 — 17 September 2014** 

**Product data sheet** 

**31 of 32** 

**PCA9570** 

**NXP Semiconductors** 

**Remote 4-bit general purpose outputs for 1 MHz I[2] C-bus** 

## **24. Contents** 

|**1**|**General description . . . . . . . . . . . . . . . . . . . . . .  1**|**23**|
|---|---|---|
|**2**|**Features and benefits . . . . . . . . . . . . . . . . . . . .  1**|**24**|
|**3**|**Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . .  1**||
|**4**|**Ordering information. . . . . . . . . . . . . . . . . . . . .  2**||
|4.1|Ordering options . . . . . . . . . . . . . . . . . . . . . . . .  2||
|**5**|**Block diagram  . . . . . . . . . . . . . . . . . . . . . . . . . .  3**||
|**6**|**Pinning information. . . . . . . . . . . . . . . . . . . . . .  4**||
|6.1|Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  4||
|6.2|Pin description  . . . . . . . . . . . . . . . . . . . . . . . . .  4||
|**7**|**Functional description  . . . . . . . . . . . . . . . . . . .  5**||
|7.1|Device address. . . . . . . . . . . . . . . . . . . . . . . . .  5||
|7.2|Software Reset Call, and device ID addresses   5||
|7.2.1|Software Reset . . . . . . . . . . . . . . . . . . . . . . . . .  6||
|7.2.2|Device ID (PCA9570 ID field) . . . . . . . . . . . . . .  7||
|**8**|**I/O programming . . . . . . . . . . . . . . . . . . . . . . . .  8**||
|8.1|I/O architecture . . . . . . . . . . . . . . . . . . . . . . . . .  8||
|8.2|Writing to the port (Output mode) . . . . . . . . . . .  8||
|8.3|Reading from a port (Input mode)  . . . . . . . . . .  9||
|8.4|Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . .  9||
|**9**|**Application design-in information . . . . . . . . .  10**||
|9.1|I/O expander applications. . . . . . . . . . . . . . . .  10||
|**10**|**Limiting values. . . . . . . . . . . . . . . . . . . . . . . . .  11**||
|**11**|**Thermal characteristics  . . . . . . . . . . . . . . . . .  11**||
|**12**|**Static characteristics. . . . . . . . . . . . . . . . . . . .  12**||
|12.1|Typical characteristics  . . . . . . . . . . . . . . . . . .  13||
|**13**|**Dynamic characteristics . . . . . . . . . . . . . . . . .  16**||
|**14**|**Power-on reset requirements . . . . . . . . . . . . .  17**||
|**15**|**Parameter measurement information  . . . . . .  19**||
|**16**|**Package outline . . . . . . . . . . . . . . . . . . . . . . . .  21**||
|**17**|**Handling information. . . . . . . . . . . . . . . . . . . .  24**||
|**18**|**Soldering of SMD packages . . . . . . . . . . . . . .  24**||
|18.1|Introduction to soldering . . . . . . . . . . . . . . . . .  24||
|18.2|Wave and reflow soldering . . . . . . . . . . . . . . .  24||
|18.3|Wave soldering. . . . . . . . . . . . . . . . . . . . . . . .  24||
|18.4|Reflow soldering . . . . . . . . . . . . . . . . . . . . . . .  25||
|**19**|**Soldering: PCB footprints. . . . . . . . . . . . . . . .  26**||
|**20**|**Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . .  29**||
|**21**|**Revision history. . . . . . . . . . . . . . . . . . . . . . . .  29**||
|**22**|**Legal information. . . . . . . . . . . . . . . . . . . . . . .  30**||
|22.1|Data sheet status . . . . . . . . . . . . . . . . . . . . . .  30||
|22.2|Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . .  30||
|22.3|Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . .  30||
|22.4|Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . .  31||



**Contact information  . . . . . . . . . . . . . . . . . . . .  31 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32** 

Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. 

**© NXP Semiconductors N.V. 2014.** 

**All rights reserved.** 

For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com **Date of release: 17 September 2014 Document identifier: PCA9570**