# MEMS Oscillator, 32.768 kHz, SMD, 1.5mm x 0.8mm, 75 ppm, SiT1532, LVCMOS

![Product image](https://novapart.co/image/farnell:2850209RL/)

**URL**: https://novapart.co/products/SIT1532AC-J5-DCC-32.768E/mems-oscillator-32768-khz-smd-15mm-x-08mm-75-ppm
**SKU**: SIT1532AC-J5-DCC-32.768E
**Manufacturer**: SITIME
**Category**: Crystals & Oscillators || Oscillators || MEMS Oscillators
**Price**: €0.5470
**Stock**: 1000+
**Lead Time**: 2 days (indicative)

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2850209RL/)

**SiT1532** Smallest Footprint (1.2mm[2] ) CSP 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

## **Features** 

- Smallest footprint in chip-scale (CSP): 1.5 x 0.8 mm 

- Fixed 32.768 kHz 

## **Applications** 

   - Mobile Phones 

   - Tablets 

   - Health and Wellness Monitors 

- <10 ppm frequency tolerance 

- Ultra-low power: <1 µA 

- Directly interfaces to XTAL inputs 

- Supports coin-cell or super-cap battery backup voltages 

- Vdd supply range: 1.5V to 3.63V over -40°C to +85°C 

- Oscillator output eliminates external load caps 

   - Fitness Watches 

   - Sport Video Cams 

   - Wireless Keypads 

   - Ultra-Small Notebook PC 

   - Pulse-per-Second (pps) Timekeeping 

   - RTC Reference Clock 

   - Battery Management Timekeeping 

- Internal filtering eliminates external Vdd bypass cap 

- NanoDrive™ programmable output swing for lowest power 

- Pb-free, RoHS and REACH compliant 

## **Electrical Specifications** 

## **Table 1. Electrical Characteristics** 

|**Parameter**|**Symbol**|**Min.**|**Typ.**|**Max.**|**Unit**|**Condition**|
|---|---|---|---|---|---|---|
|**Frequency and Stability**<br>~~|~~|||||||
|**Fixed Output Frequency**<br>~~|~~<br>~~eG~~|Fout<br>~~|~~<br>~~eG~~|32.768<br>~~|~~<br>~~eG~~|||kHz<br>~~|~~<br>~~eG~~|~~|~~<br>~~eG~~|
|**Frequency Stability**<br>~~eG~~<br>~~Re~~<br>~~ee~~<br>~~eeeeee~~<br>~~ee~~|||||||
|**Frequency Tolerance[1]**<br>~~ee~~|F_tol<br>~~ee~~|~~ee~~|~~ee~~|10<br>~~ee~~|ppm<br>~~ee~~|TA= 25°C, post reflow, Vdd: 1.5V – 3.63V.<br>~~ee~~|
|||~~ee~~|~~ee~~|20<br>~~ee~~|ppm<br>~~ee~~|TA= 25°C, post reflow with board-level underfill,<br>Vdd: 1.5V – 3.63V.<br>~~ee~~|
|**Frequency Stability[2]**<br>~~ee~~|F_stab<br>~~ee~~|~~ee~~|~~ee ~~|75<br> ~~ee ~~|ppm<br> ~~ee~~|TA= -10°C to +70°C, Vdd: 1.5V – 3.63V.<br>~~ee~~|
|||||100||TA= -40°C to +85°C, Vdd: 1.5V – 3.63V.|
|||||250||TA= -10°C to +70°C, Vdd: 1.2V – 1.5V.|
|**25°C Aging**<br>~~GGG~~|~~GGG~~|-1<br>~~GGG~~|~~GGG~~|1<br>~~GGG~~|ppm<br>~~GGG~~|1st Year<br>~~GGG~~|
|**Supply Voltage and Current Consumption**<br>~~GGG~~<br>~~|~~<br>~~———_——_—eeEE~~|||||||
|**Operating Supply Voltage**<br>~~|~~<br>~~a~~|Vdd<br>~~|~~<br>~~a~~|1.2<br>~~|~~<br>~~a~~<br>~~———_~~|~~|~~<br>~~a~~<br>~~———_~~|3.63<br>~~|~~<br>~~a~~<br>~~———_~~|V<br>~~|~~<br>~~a~~<br>~~———_——_—eeEE~~|TA= -10°C to +70°C<br>~~|~~<br>~~a~~<br>~~—_—eeEE~~|
|||1.5<br>~~a~~<br>~~———_~~<br>~~ee~~|~~a~~<br>~~———_~~<br>~~ee~~|3.63<br>~~a~~<br>~~———_~~<br>~~ee~~|V<br>~~a~~<br>~~———_——_—eeEE~~|TA= -40°C to +85°C<br>~~a~~<br>~~—_—eeEE~~<br>~~po~~|
|**Core Operating Current[3]**|Idd|~~———_~~<br>~~ee~~<br>~~a~~|0.90<br>~~———_~~<br>~~ee~~<br>~~ee~~|~~———_~~<br>~~ee~~|μA<br>~~———_——_—eeEE~~|TA= 25°C, Vdd: 1.8V. No load<br>~~—_—eeEE~~<br>~~po~~<br>~~po~~|
|||~~ee ~~<br>~~a~~<br>~~a~~|~~ee~~<br>~~ee~~<br>~~ee~~|1.3<br>~~ee~~||TA= -10°C to +70°C, Vdd max: 3.63V. No load<br>~~po~~<br>~~po~~<br>~~pO~~|
|||~~a~~<br>~~a~~|~~ee~~<br>~~ee~~|1.4||TA= -40°C to +85°C, Vdd max: 3.63V. No load<br>~~po~~<br>~~pO~~|
|**Output Stage Operating Current[3]**|Idd_out|~~a~~|0.065<br>~~ee~~|0.125|μA/Vpp|TA= -40°C to +85°C, Vdd: 1.5V – 3.63V. No load<br>~~pO~~|
|**Power-Supply Ramp**|t_Vdd<br>Ramp|||100|ms|Vdd Ramp-up from 0 to 90%, TA= -40°C to +85°C|
|**Start-up Time at Power-up[4]**|t_start||180|300|ms|TA= -40°C ≤ TA≤ +50°C, valid output|
|||||450||TA= +50°C < TA≤ +85°C, valid output|
|**Operating Temperature Range**<br>~~Re~~|||||||
|**Commercial Temperature**<br>~~Ge~~<br>~~po~~|T_use<br>~~Ge~~|-10<br>~~Ge~~<br>~~a~~|~~a~~|70<br>~~Ee~~<br>~~a~~|°C<br>~~Ee~~|~~Ee~~|
|**Industrial Temperature**<br>~~Ge~~<br>~~po~~||-40<br>~~Ge ~~<br>~~a~~|<br>~~a~~|85<br> ~~Ee~~<br>~~a~~|°C<br>~~Ee~~|~~Ee~~|



1. Measured peak-to-peak. Tested with Agilent 53132A frequency counter. Due to the low operating frequency, the gate time must be ≥100 ms to ensure an accurate frequency measurement. 

2. Measured peak-to-peak. Inclusive of Initial Tolerance at 25°C, and variations over operating temperature, rated power supply voltage and load. Stability is specified for two operating voltage ranges. Stability progressively degrades with supply voltage below 1.5V. 

3. Core operating current does not include output driver operating current or load current. To derive total operating current (no load), add core operating current + (0.065 µA/V) * (output voltage swing). 

4. Measured from the time Vdd reaches 1.5V. 

Rev 1.26 

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**SiT1532** Smallest Footprint (1.2mm[2] ) CSP, 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

**Table 1. Electrical Characteristics (continued)** 

|**Parameter**|**Symbol**|**Min.**|**Typ.**|**Max.**|**Unit**|**Condition**|
|---|---|---|---|---|---|---|
||**LVCMOS Output Option, TA = -40°C to +85°C, typical**|||||**values are at TA = 25°C**|
|**Output Rise/Fall Time**|tr, tf||100|200|ns|10-90%(Vdd),15pF load,Vdd = 1.5V to 3.63V|
|||||50||10-90%(Vdd), 5pF load, Vdd ≥ 1.62V|
|**Output Clock Duty Cycle**|DC|48||52|%||
|**Output Voltage High**|VOH|90%|||V|Vdd: 1.5V – 3.63V. IOH= -10 μA, 15 pF|
|**Output Voltage Low**|VOL|||10%|V|Vdd: 1.5V – 3.63V. IOL= 10 μA, 15 pF|
|||**NanoDrive™ Programmable,**|||**Reduced Swing Output**||
|**Output Rise/Fall Time**|tf, tf|||200|ns|30-70% (VOL/VOH), 10 pF Load|
|**Output Clock Duty Cycle**|DC|48||52|%||
|**AC-coupled Programmable**<br>**Output Swing**|V_sw||0.20 to<br>0.80||V|SiT1532 does not internally AC-couple. This output description<br>is intended for a receiver that is AC-coupled. SeeTable 5for<br>acceptable NanoDrive swing options.<br>Vdd: 1.5V – 3.63V, 10 pF Load, IOH/ IOL= ±0.2 μA.|
|**DC-Biased Programmable**<br>**Output Voltage High Range**|VOH||0.60 to<br>1.225||V|Vdd: 1.5V – 3.63V. IOH = -0.2 μA, 10 pF Load. SeeTable 4for<br>acceptable VOH/VOL setting levels.|
|**DC-Biased Programmable**<br>**Output Voltage Low Range**|VOL||0.35 to<br>0.80||V|Vdd: 1.5V – 3.63V. IOL= 0.2 μA, 10 pF Load. SeeTable 4for<br>acceptable VOH/VOLsetting levels.|
|**Programmable Output Voltage**<br>**Swing Tolerance**||-0.055||0.055|V|TA= -40°C to +85°C, Vdd = 1.5V to 3.63V.|
|||||**Jitter**|||
|**Period Jitter**|T_jitt||35||nsRMS|Cycles = 10,000, TA= 25°C, Vdd = 1.5V – 3.63V|



## **Table 2. Pin Configuration** 

|**Pin**|**Symbol**|**I/O**|**Functionality**|**CSP Package (Top View)**<br>GND<br>Vdd<br>CLK Out<br>GND<br>1<br>4<br>2<br>3<br>**Figure 1. Pin Assignments**|
|---|---|---|---|---|
|1, 4|GND|Power Supply<br>Ground|Connect to ground. Acceptable to connect pin 1 and 4 together. Both pins<br>must be connected to GND.||
|2|CLK Out|OUT|Oscillator clock output. The CLK can drive into a Ref CLK input or into an<br>ASIC or chip-set’s 32kHz XTAL input. When driving into an ASIC or<br>chip-set oscillator input (X IN and X Out), the CLK Out is typically<br>connected directly to the XTAL IN pin. No need for load capacitors. The<br>output driver is intended to be insensitive to capacitive loading.||
|3|Vdd|Power<br>Supply|Connect to power supply 1.2V ≤ Vdd ≤ 3.63V. Under normal operating<br>conditions, Vdd does not require external bypass/decoupling<br>capacitor(s).<br>For more information about the internal power-supply filtering, see the<br>Power Supply Noise Immunity section in the detailed description.<br>Contact factory for applications that require a wider operating supply<br>voltage range.||



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## **System Block Diagram** 

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MEMS Resonator<br>GND Control Regulators Vdd<br>Trim Prog Prog<br>Sustaining Ultra-low Ultra-low<br>GND Amp PowerPLL Divider Power Driver CLK Out<br>**----- End of picture text -----**<br>


**Figure 2. SiT1532 Block Diagram** 

## **Table 3. Absolute Maximum Limits** 

Attempted operation outside the absolute maximum ratings may cause permanent damage to the part. Actual performance of the IC is only guaranteed within the operational specifications, not at absolute maximum ratings. 

|**Parameter**|**Test Condition**|**Value**|**Unit**|
|---|---|---|---|
|**Continuous Power Supply Voltage Range (Vdd)**||-0.5 to 3.63|V|
|**Short Duration Maximum Power Supply Voltage (Vdd)**|<30 minutes|4.0|V|
|**Continuous Maximum Operating Temperature Range**|Vdd = 1.5V - 3.63V|105|°C|
|**Short Duration Maximum Operating Temperature Range**|Vdd = 1.5V - 3.63V, ≤30 mins|125|°C|
|**Human Body Model ESD Protection**|JESD22-A114|3000|V|
|**Charge-Device Model(CDM) ESD Protection**|JESD22-C101|750|V|
|**Machine Model(MM) ESD Protection**|JESD22-A115|300|V|
|**Latch-up Tolerance**|JESD78 Compliant|||
|**Mechanical Shock Resistance**|Mil 883, Method 2002|10,000|g|
|**Mechanical Vibration Resistance**|Mil 883, Method 2007|70|g|
|**1508 CSP Junction Temperature**||150|°C|



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**SiT1532** Smallest Footprint (1.2mm[2] ) CSP, 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

## **Description** 

The SiT1532 is the world’s smallest, lowest power 32 kHz oscillator optimized for mobile and other battery-powered applications. SiTime’s silicon MEMS technology enables the smallest footprint and chip-scale packaging. This device reduces the 32 kHz footprint by as much as 85% compared to existing 2.0 x 1.2 mm SMD XTAL packages. Unlike XTALs, the SiT1532 oscillator output enables greater component placement flexibility and eliminates external load capacitors, thus saving additional component count and board space. And unlike standard oscillators, the SiT1532 features NanoDrive™, a factory programmable output that reduces the voltage swing to minimize power. 

The 1.2V to 3.63V operating supply voltage range makes it an ideal solution for mobile applications that incorporate a low-voltage, battery-back-up source such as a coin-cell or super-cap. 

SiTime’s MEMS oscillators consist of MEMS resonators and a programmable analog circuit. Our MEMS resonators are built with SiTime’s unique MEMS First™ process. A key manufacturing step is EpiSeal™ during which the MEMS resonator is annealed with temperatures over 1000°C. EpiSeal creates an extremely strong, clean, vacuum chamber that encapsulates the MEMS resonator and ensures the best performance and reliability. During EpiSeal, a poly silicon cap is grown on top of the resonator cavity, which eliminates the need for additional cap wafers or other exotic packaging. As a result, SiTime’s MEMS resonator die can be used like any other semiconductor die. One unique result of SiTime’s MEMS First and EpiSeal manufacturing processes is the capability to integrate SiTime’s MEMS die with a SOC, ASIC, microprocessor or analog die within a package to eliminate external timing components and provide a highly integrated, smaller, cheaper solution to the customer. 

## **Frequency Stability** 

The SiT1532 is factory calibrated (trimmed) to guarantee frequency stability to be less than 10 ppm at room temperature and less than 100 ppm over the full -40°C to +85°C temperature range. Unlike quartz crystals that have a classic tuning fork parabola temperature curve with a 25°C turnover point, the SiT1532 temperature coefficient is extremely flat across temperature. The device maintains less than 100 ppm frequency stability over the full operating temperature range when the operating voltage is between 1.5 and 3.63V as shown in Figure 3. 

Functionality is guaranteed over the 1.2V – 3.63V operating supply voltage range. However, frequency stability degrades below 1.5V and steadily degrades as it approaches the 1.2V minimum supply due to the internal regulator limitations. Between 1.2V and 1.5V, the frequency stability is 250 ppm max over temperature. 

When measuring the SiT1532 output frequency with a frequency counter, it is important to make sure the counter's gate time is >100ms. The slow frequency of a 32kHz clock will give false readings with faster gate times. 

Contact SiTime for applications that require a wider supply voltage range >3.63V or lower frequency options as low as 1Hz. 

**==> picture [202 x 118] intentionally omitted <==**

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100}— —— SiT153x Industrial Temp Specification — — —<br>SiT1532 10ppm<br>“Ree SiT1532 Measured Max @ 25 C<br>— =<br>50 aPs wa-=. Quartz XTAL-160 to -220 ppm Over Temp a_— iga~<br>400] Ya<br>i<br>1900 -20 0 20 40 60<br>Temperature (°C)<br>Frequency Stability (ppm)<br>**----- End of picture text -----**<br>


**Figure 3. SiTime vs. Quartz** 

## **Power Supply Noise Immunity** 

In addition to eliminating external output load capacitors common with standard XTALs, The SiT1532 includes special internal power supply filtering and thus, eliminates the need for an external Vdd bypass-decoupling capacitor. This feature further simplifies the design and keeps the footprint as small as possible. Internal power supply filtering is designed to reject greater than ±150 mVpp magnitude and frequency components through 10 MHz. 

## **Output Voltage** 

The SiT1532 has two output voltage options. One option is a standard LVCMOS output swing. The second option is the NanoDrive reduced swing output. Output swing is customer specific and programmed between 200 mV and 800 mV. For DC-coupled applications, output VOH and VOL are individually factory programmed to the customers’ requirement. VOH programming range is between 600 mV and 1.225V in 100 mV increments. Similarly, VOL programming range is between 350 mV and 800 mV. For example; a PMIC or MCU is internally 1.8V logic compatible, and requires a 1.2V VIH and a 0.6V VIL. Simply select SiT1532 NanoDrive factory programming code to be “D14” and the correct output thresholds will match the downstream PMIC or MCU input requirements. Interface logic will vary by manufacturer and we recommend that you review the input voltage requirements for the input interface. 

For DC-biased NanoDrive output configuration, the minimum VOL is limited to 350mV and the maximum allowable swing (VOH – VOL) is 750 mV. For example, 1.1V VOH  and 400 mV VOL is acceptable, but 1.2V VOH and 400 mV VOL is not acceptable. 

When the output is interfacing to an XTAL input that is internally AC-coupled, the SiT1532 output can be factory programmed to match the input swing requirements. For example, if a PMIC or MCU input is internally AC-coupled and requires an 800 mV swing, then simply choose the SiT1532 NanoDrive programming code “AA8” in the part number. It is important to note that the SiT1532 does not include internal AC-coupling capacitors. Please see the Part Number Ordering section at the end of the datasheet for more information about the part number ordering scheme. 

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## **Power-up** 

The SiT1532 starts-up to a valid output frequency within 300 ms (180 ms typ). To ensure the device starts-up within the specified limit, make sure the power-supply ramps-up in approximately 10 – 20 ms (to within 90% of Vdd). Start-up time is measured from the time Vdd reaches 1.5V. For applications that operate between 1.2V and 1.5V, the start-up time will be typically 50 ms longer over temperature. 

## **SiT1532 NanoDrive™** 

## **SiT1532 Full Swing LVCMOS Output** 

The SiT1532 can be factory programmed to generate full-swing LVCMOS levels. Figure 5 shows the typical waveform (Vdd = 1.8V) at room temperature into a 15 pF load. 

## **Example:** 

- LVCMOS output part number coding is always **DCC** 

- Example part number: SiT1532AI-J4- **DCC** -32.768 

Figure 4 shows a typical output waveform of the SiT1532 (into a 10 pF load) when factory programmed for a 0.70V swing and DC bias (VOH/VOL) for 1.8V logic: 

## **Example:** 

- NanoDrive™ part number coding: D14. Example part number: SiT1532AI-J4-D14-32.768 

- VOH = 1.1V, VOL = 0.4V (V_sw = 0.70V) 

**Figure 5.  LVCMOS Waveform (Vdd = 1.8V) into 15 pF Load** 

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**Figure 4.  SiT1532AI-J4-D14-32.768 Output Waveform (10 pF load)** 

Table 4 shows the supported NanoDrive™ VOH, VOL factory programming options. 

**Table 4. Acceptable VOH/VOL NanoDrive™ Levels** 

|**NanoDrive**|**VOH(V)**|**VOL(V)**|**Swing (mV)**|**Comments**|
|---|---|---|---|---|
|D26|1.2|0.6|600 ±55|1.8V logic compatible|
|D14|1.1|0.4|700 ±55|1.8V logic compatible|
|D74|0.7|0.4|300 ±55|XTAL compatible|
|AA3|n/a|n/a|300 ±55|XTAL compatible|



The values listed in Table 4 are nominal values at 25°C and will exhibit a tolerance of ±55 mV across Vdd and -40°C to 85°C operating temperature range. 

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**SiT1532** Smallest Footprint (1.2mm[2] ) CSP, 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

## **Calculating Load Current** 

## **No Load Supply Current** 

When calculating no-load power for the SiT1532, the core and output driver components need to be added. Since the output voltage swing can be programmed for reduced swing between 250 mV and 800 mV for ultra-low power applications, the output driver current is variable. Therefore, no-load operating supply current is broken into two sections; core and output driver. The equation is as follows: 

Total Supply Current (no load) = Idd Core + (65nA/V)(Voutpp 

## **Example 1: Full-swing LVCMOS** 

- Vdd = 1.8V 

- Idd Core = 900nA (typ) 

- Voutpp = 1.8V 

## **Total Supply Current with Load** 

To calculate the total supply current, including the load, follow the equation listed below. Note the 30% reduction in power with NanoDrive™. 

Total Current = Idd Core + Idd Output Driver (65nA/V*Voutpp) + Load Current (C*V*F) 

## **Example 1: Full-swing LVCMOS** 

- Vdd = 1.8V 

- Idd Core = 900nA 

- Load Capacitance = 10pF 

- Idd Output Driver: (65nA/V)(1.8V) = 117nA 

- Load Current: (10pF)(1.8V)(32.768kHz) = 590nA 

- Total Current = 900nA + 117nA + 590nA = 1.6µA 

Supply Current = 900nA + (65nA/V)(1.8V) = 1017nA 

## **Example 2: NanoDrive™ Reduced Swing** 

## **Example 2: NanoDrive™ Reduced Swing** 

   - Vdd = 1.8V 

   - Idd Core = 900nA (typ) 

- Voutpp (D14) = VOH – VOL = 1.1V - 0.4V = 700mV 

- Supply Current = 900nA + (65nA/V)(0.7V) = 946nA 

- Vdd = 1.8V 

- Idd Core = 900nA 

- Load Capacitance = 10pF 

- Voutpp (D14): VOH – VOL = 1.1V - 0.4V = 700mV 

- Idd Output Driver: (65nA/V)(0.7V) = 46nA 

- Load Current: (10pF)(0.7V)(32.768kHz) = 229nA 

- Total Current = 900nA + 46nA + 229nA = 1.175µA 

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**SiT1532** Smallest Footprint (1.2mm[2] ) CSP, 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

## **Typical Operating Curves** 

## **(TA  = 25** ° **C, Vdd = 1.8V, unless otherwise stated)** 

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30<br>25<br>Min/Max Limit<br>20<br>15<br>10<br>5<br>-15 -10 -5 0 5 10 15<br>Initial Tolerance (ppm)<br>TA = 25°C Post Reflow, No underfill<br>Number of Devices<br>**----- End of picture text -----**<br>


**Figure 6. Initial Tolerance Histogram** 

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Temperature (°C)<br>**----- End of picture text -----**<br>


**Figure 7. Frequency Stability Over Temperature** 

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80 Vdd =.= 3.63V<br>z \<br>€ _ eee<br>i)2 00 IN<br>o Vdd =1.5 -— 1.8V<br>oa 40<br>6=a 20<br>°40 20 0 20 40 £460 °+# 80<br>Temperature (°C)<br>**----- End of picture text -----**<br>


**Figure 8. Core Current Over Temperature** 

**Figure 9. Output Stage Current Over Temperature** 

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2+] (tstart when Vdd = 1.5V) glock<br>15) x<br>1<br>0.5)<br>Device Star t- up Time<br>i<br>08) 0.05 0.1 0.15 02<br>Time (sec)<br>Voltage (V)<br>**----- End of picture text -----**<br>


**Figure 10. Start-up Time** 

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g °<br>s=;<br>ep ao a as<br>3<br>c<br>(1)<br>S® 5<br>Wwe<br>-10<br>1k 10k 100k<br>Noise Injection Frequency (Hz)<br>**----- End of picture text -----**<br>


**Figure 11. Power Supply Noise Rejection** (±150mV Noise) 

**Figure 12. NanoDrive™ Output Waveform** (VOH = 1.1V, VOL = 0.4V; SiT1532AI-J4-D14-32.768) 

**Figure 13. LVCMOS Output Waveform** (Vswing = 1.8V, SiT1532AI-J4-DCC-32.768) 

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**SiT1532** Smallest Footprint (1.2mm[2] ) CSP, 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

## **Dimensions and Patterns** 

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Package Size – Dimensions (Unit: mm) Recommended Land Pattern (Unit: mm)<br>1.55 x 0.85 mm CSP<br>1.54 ±0.02<br>#4 #3 #3 #4 #4 #3<br>0.315 ±0.015<br>#2<br>#1 #2 #2 #1 #1<br>(soldermask openings shown with<br>dashed line around NSMD pad)<br>Recommend 4-mil (0.1mm) stencil thickness<br>0.84 ±0.02<br>**----- End of picture text -----**<br>


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**SiT1532** Smallest Footprint (1.2mm[2] ) CSP, 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

## **Manufacturing Guidelines** 

- 1) No Ultrasonic Cleaning: Do not subject the SiT1532 to an ultrasonic cleaning environment. Permanent damage or long term reliability issues to the MEMS structure may occur. 

- 2) Applying board-level underfill (BLUF) to the device is acceptable, but will cause a shift in the frequency tolerance, as specified in the datasheet electrical table. Tested with UF3810, UF3808, and FP4530 underfill. 

- 3) Reflow profile, per JESD22-A113D. 

- 4) For additional manufacturing guidelines and marking/tape-reel instructions, refer to SiTime Manufacturing Notes. 

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**SiT1532** Smallest Footprint (1.2mm[2] ) CSP, 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

## **Ordering Information** 

Part number characters in blue represent the customer specific options. The other characters in the part number are fixed. 

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**----- Start of picture text -----**<br>
- - -<br>SiT1532AI J4 D14 32.768S<br>Packaging<br>Part Family “S”: 8 mm Tape & Reel, 10ku reel<br>“SiT1532” “D”: 8 mm Tape & Reel, 3ku reel<br>“E”: 8 mm Tape & Reel, 1ku reel<br>Samples in cut Tape & Reel strips<br>Revision Letter<br>“A”: is the revision<br>Output Clock Frequency<br>Temperature Range 32.768 kHz<br>“C”: Commercial, -10 to 70ºC<br>“I”:   Industrial, -40 to 85ºC<br>Output Voltage Setting<br>DCC: LVCMOS Output<br>Package Size NanoDrive™ Reduced Swing Output<br>1.5 mm x 0.8 mm CSP Refer to Table 2 for output setting options<br>“A”: AC-coupled signal path<br>“D”: DC-coupled signal path<br>Frequency Stability<br>“5”: 75 ppm (-10 to 70ºC)<br>“4”: 100 ppm (-40 to 85ºC)<br>**----- End of picture text -----**<br>


The following examples illustrate how to select the appropriate temp range and output voltage requirements: 

## **Example 1: SiT1532AI-J4-D14-32.768** 

- 1) Industrial temp & corresponding 100 ppm frequency stability. Note, 100 ppm is only available for the industrial temp range, and 75 ppm is only available for the commercial temp range. 

- 2) Output swing requirements: 

   - a) “D” = DC-coupled receiver 

   - b) “1” = VOH = 1.1V 

   - c) “4” = VOL = 400mV 

## **Example 2: SiT1532AC-J5-AA3-32.768** 

- 1) Commercial temp & corresponding 75 ppm frequency stability. Note, 100 ppm is only available for the industrial temp range, and 75 ppm is only available for the commercial temp range. 

- 2) Output swing requirements: 

   - a) “A” = AC-coupled receiver 

   - b) “A” = AC-coupled receiver 

   - c) “3” = 300mV swing 

**Table 5. Acceptable VOH/VOL NanoDrive™ Levels[[5]]** 

|**NanoDrive**|**VOH(V)**|**VOL(V)**|**Swing (mV)**|**Comments**|
|---|---|---|---|---|
|D26|1.2|0.6|600 ±55|1.8V logic compatible|
|D14|1.1|0.4|700 ±55|1.8V logic compatible|
|D74|0.7|0.4|300 ±55|XTAL compatible|
|AA3|n/a|n/a|300 ±55|XTAL compatible|



## **Note:** 

5. If these available options do not accommodate your application, contact Factory for other NanoDrive options. 

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**SiT1532** Smallest Footprint (1.2mm[2] ) CSP, 10 ppm Ultra-Low Power 32.768 kHz XTAL Replacement 

**Table 6. Revision History** 

|**Version**|**Release Date**|**Change Summary**|
|---|---|---|
|1.0|09/02/2014|Rev 0.9 Preliminary to Rev 1.0 Production Release<br>Updated start-up time specification<br>Added typical operating plots<br>Separated initial tolerance spec for condition with and without underfill<br>Added Manufacturing Guidelines section|
|1.1|10/14/2014|Improved Start-up Time at Power-up spec<br>Added 5pF LVCMOS rise/fall time spec|
|1.2|11/07/2014|Updated 5pF LVCMOS rise/fall time spec|
|1.25|06/03/2016|Updated NanoDrive section<br>Updated test conditions in the absolute maximum table|
|1.26|01/16/2018|Updated SPL, page layout changes|



## **SiTime Corporation** , 5451 Patrick Henry Drive, Santa Clara, CA 95054, USA | **Phone:** +1-408-328-4400 | **Fax:** +1-408-328-4439 

> © SiTime Corporation 2014-2018. The information contained herein is subject to change at any time without notice. SiTime assumes no responsibility or liability for any loss, damage or defect of a Product which is caused in whole or in part by (i) use of any circuitry other than circuitry embodied in a SiTime product, (ii) misuse or abuse including static discharge, neglect or accident, (iii) unauthorized modification or repairs which have been soldered or altered during assembly and are not capable of being tested by SiTime under its normal test conditions, or (iv) improper installation, storage, handling, warehousing or transportation, or (v) being subjected to unusual physical, thermal, or electrical stress. 

**Disclaimer:** SiTime makes no warranty of any kind, express or implied, with regard to this material, and specifically disclaims any and all express or implied warranties, either in fact or by operation of law, statutory or otherwise, including the implied warranties of merchantability and fitness for use or a particular purpose, and any implied warranty arising from course of dealing or usage of trade, as well as any common-law duties relating to accuracy or lack of negligence, with respect to this material, any SiTime product and any product documentation. Products sold by SiTime are not suitable or intended to be used in a life support application or component, to operate nuclear facilities, or in other mission critical applications where human life may be involved or at stake. All sales are made conditioned upon compliance with the critical uses policy set forth below. 

## CRITICAL USE EXCLUSION POLICY 

BUYER AGREES NOT TO USE SITIME'S PRODUCTS FOR ANY APPLICATION OR IN ANY COMPONENTS USED IN LIFE SUPPORT DEVICES OR TO OPERATE NUCLEAR FACILITIES OR FOR USE IN OTHER MISSION-CRITICAL APPLICATIONS OR COMPONENTS WHERE HUMAN LIFE OR PROPERTY MAY BE AT STAKE. 

SiTime owns all rights, title and interest to the intellectual property related to SiTime's products, including any software, firmware, copyright, patent, or trademark. The sale of SiTime products does not convey or imply any license under patent or other rights. SiTime retains the copyright and trademark rights in all documents, catalogs and plans supplied pursuant to or ancillary to the sale of products or services by SiTime. Unless otherwise agreed to in writing by SiTime, any reproduction, modification, translation, compilation, or representation of this material shall be strictly prohibited. 

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## Links

- [View this product on Novapart](https://novapart.co/products/SIT1532AC-J5-DCC-32.768E/mems-oscillator-32768-khz-smd-15mm-x-08mm-75-ppm)
- [Request a quote for this part](https://novapart.co/quote/)
- [Supplier page](https://es.farnell.com/en-ES/sitime/sit1532ac-j5-dcc-32-768e/osc-32-7khz-1-5-x-0-8mm-lvcmos/dp/2850209RL)
---

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