DS1088LU-737+T

## **DS1088L** 

## **General Description** 

The DS1088L is a low-cost clock generator that produces a square-wave output without external timing components. The fixed-frequency oscillator is available in factory-calibrated frequencies from 312kHz to 133MHz. The device has a power-down pin for power-sensitive applications. 

## **Applications** 

- Printers 

- Copiers 

- Computer Peripherals 

## **Fixed-Frequency EconOscillator™** 

## **Features** 

   - Factory-Programmed Square-Wave Generator from 321kHz to 133MHz 

   - Single Output 

   - No External Timing Components Required 

   - 2.7V to 3.6V Supply 

   - Power-Down Mode 

   - 1% Frequency Tolerance Over Temperature and Voltage 

   - Wide Temperature Range (-20°C to +85°C) 

- POS Terminals 

- Cable Modems 

## _**Ordering Information appears at end of data sheet.**_ 

## **Typical Operating Circuit** 

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312kHz TO 133MHz<br>OUTPUT OUT DNC<br>DS1088L<br>VCC DNC<br>VCC VCC<br>VCC PDN<br>GND GND<br>DECOUPLING CAPACITORS<br>(0.1µF AND 0.01µF)<br>**----- End of picture text -----**<br>


_EconOscillator is a trademark of Maxim Integrated Products, Inc._ 

_For related parts and recommended products to use with this part, refer to_ _**www.maximintegrated.com/DS1088L.related** ._ 

**==> picture [125 x 31] intentionally omitted <==**

_19-6184; Rev 3; 4/15_ 

## DS1088L 

## Fixed-Frequency EconOscillator™ 

## **Absolute Maximum Ratings** 

(Voltages relative to ground.) 

Voltage Range on VCC .........................................-0.5V to +6.0V Voltage Range on PDN ...........................-0.5V to (VCC + 0.5V)* Operating Temperature Range ........................... -20°C to +85°C 

Storage Temperature Range ............................ -55°C to +125°C Lead Temperature (soldering, 10s) .................................+300°C Soldering Temperature (reflow) .......................................+260°C 

## * _Not to exceed +6.0V._ 

_Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability._ 

## **Recommended Operating Conditions** 

(TA = -20°C to +85°C, unless otherwise noted.) 

|**PARAMETER**|**SYMBOL**|**CONDITIONS**|**MIN**<br>**TYP**<br>**MAX**|**UNITS**|
|---|---|---|---|---|
|Supply Voltage|VCC|(Note 1)|2.7<br>3.6|V|
|High-Level Input Voltage (PDN)|VIH||0.7 x VCC<br>VCC+ 0.3|V|
|Low-Level Input Voltage (PDN)|VIL||-0.3<br>0.3 x VCC|V|



## **DC Electrical Characteristics** 

(VCC = 2.7V to 3.6V, TA = -20°C to +85°C, unless otherwise noted.) 

|**PARAMETER**|**SYMBOL**|**CONDITIONS**|**MIN**<br>**TYP**<br>**MAX**|**UNITS**|
|---|---|---|---|---|
|High-Level Output Voltage (OUT)|VOH|IOH= -4mA, VCC= MIN|VCC- 0.4|V|
|Low-Level Output Voltage (OUT)|VOL|IOL= 4mA|0.4|V|
|High-Level Input Current (PDN)|IIH|VCC= 3.6V|1|µA|
|Low-Level Input Current (PDN)|IIL|VIL= 0V|-1|µA|
|Supply Current (Active)|ICC|VCC= 3.6V, CL= 15pF, fO= 133MHz|15<br>24|mA|
|Standby Current (Power-Down)|ICCQ|Power-down mode|10|µA|



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## DS1088L 

## Fixed-Frequency EconOscillator™ 

## **Oscillator Characteristics** 

(VCC = 2.7V to 3.6V, TA = -20°C to +85°C, unless otherwise noted.) 

|**PARAMETER**|**SYMBOL**|**SYMBOL**|**CONDITIONS**|**CONDITIONS**|**MIN**<br>**TYP**<br>**MAX**|**UNITS**|
|---|---|---|---|---|---|---|
|Output Frequency Range<br>Available||fO|||0.3124<br>133.3|MHz|
|Output Frequency Tolerance||O<br>O<br>f<br>f<br>∆|VCC= 3.3V, TA= +25°C (Note 2)||-0.3<br>+0.3|%|
|Voltage Frequency Variation||V<br>O<br>f<br>f<br>∆|Over voltage range, TA= +25°C (Note 3)||-0.35<br>+0.35|%|
|Temperature Frequency Variation||T<br>O<br>f<br>f<br>∆|Over temperature<br>range, VCC= 3.3V<br>(Notes 4, 5)|-20°C to +25°C|-0.7<br>+0.7|%|
|||||+25°C to +85°C|-0.5<br>+0.5||
|Frequency Variation Over Voltage<br>and Temperature||V,T<br>O<br>f<br>f<br>∆|Over voltage and temperature range||-1.0<br>+1.0|%|



## **AC Electrical Characteristics** 

(VCC = 2.7V to 3.6V, TA = -20°C to +85°C, unless otherwise noted.) 

|**PARAMETER**|**SYMBOL**|**CONDITIONS**|**MIN**<br>**TYP**<br>**MAX**|**UNITS**|
|---|---|---|---|---|
|Power-Up Time|tPOR+<br>tSTAB|(Note 6)|100|µs|
|OUT Disabled After Entering<br>Power-Down Mode|tPDN|(Note 7)|7|µs|
|Load Capacitance|CL|(Note 8)|15<br>50|pF|
|Output Duty Cycle (OUT)||fO< 80MHz, fO≥ 80MHz|40<br>60|%|
|||fO< 80MHz|50||



**Note 1:** All voltages are referenced to ground. 

- **Note 2:** Typical frequency shift due to aging is within ±0.2%. Aging stressing includes level 1 moisture reflow preconditioning (24hr +125°C bake, 168hr +85°C/85%RH moisture soak, and three solder reflow passes +240°C +0°C/-5°C peak) followed by1000hr (max) VCC biased +125°C OP/L, 1000hr unbiased +150°C bake, 1000 temperature cycles at -55°C to +125°C, and 168hr +121°C/2 ATM steam/unbiased autoclave. 

- **Note 3:** This is the change in output frequency due to changes in voltage at TA = +25°C. 

**Note 4:** Guaranteed by design. 

- **Note 5:** This is the change in output frequency due to changes in temperature from the +25°C frequency at VCC = 3.3V. 

- **Note 6:** This indicates the time elapsed between power-up and the output becoming active. An on-chip delay is intentionally introduced to allow the oscillator to stabilize. tSTAB is equivalent to approximately 512 clock cycles and will depend on the programmed oscillator frequency. 

- **Note 7:** Output disabled in two cycles or less of the output frequency. 

- **Note 8:** Output voltage swings may be impaired at high frequencies combined with high-output loading. 

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## DS1088L 

## Fixed-Frequency EconOscillator™ 

## **Typical Operating Characteristics** 

(VCC = 3.3V, TA = +25°C, unless otherwise noted.) 

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ACTIVE SUPPLY CURRENT ACTIVE SUPPLY CURRENT ACTIVE SUPPLY CURRENT<br>vs. TEMPERATURE vs. SUPPLY VOLTAGE vs. SUPPLY VOLTAGE<br>10 10 15<br>VCC = 3.3V CL = 1.8pF TA = +25°C CL = 1.8pF 14 TA = +25°C CL = 15pF<br>9 9<br>13<br>8 8<br>12<br>7 133MHz 7 11<br>133MHz 133MHz<br>6 6 10<br>100MHz 100MHz 9<br>5 5 100MHz<br>8<br>4 4<br>80MHz 7<br>80MHz 80MHz<br>3 3 6<br>-20 5 30 55 80 2.7 2.9 3.1 3.3 3.5 2.7 2.9 3.1 3.3 3.5<br>TEMPERATURE (°C) SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V)<br>SHUTDOWN SUPPLY CURRENT FREQUENCY ERROR  FREQUENCY ERROR<br>vs. TEMPERATURE vs. SUPPLY VOLTAGE vs. TEMPERATURE<br>2.5 0.20 0.3<br>2.4 VCC = 3.3V VPDN = 0V 0.15 0.2 VCC = 3.3V<br>2.3 100MHz 100MHz<br>0.10<br>2.2 0.1<br>0.05<br>2.1 0 133MHz<br>2.0 0 133MHz 80MHz<br>-0.1<br>1.9<br>-0.05<br>1.8 80MHz -0.2 100MHz<br>-0.10<br>1.7 80MHz<br>1.6 -0.15 TA = +25°C -0.3 T A  = +25°C<br>CL [||]  RL = 1.8pF  [||]  500Ω CL [||]  RL = 1.8pF  [||]  500Ω<br>1.5 -0.20 -0.4<br>-20 5 30 55 80 2.7 2.9 3.1 3.3 3.5 -20 5 30 55 80<br>TEMPERATURE (°C) SUPPLY VOLTAGE (V) TEMPERATURE (°C)<br>DUTY CYCLE DUTY CYCLE<br> vs. SUPPLY VOLTAGE vs. TEMPERATURE<br>56 56<br>133MHz 133MHz VCC = 3.3V<br>55 55<br>54<br>54<br>53<br>53<br>100MHz<br>52<br>100MHz<br>52<br>51<br>51<br>50<br>80MHz 80MHz<br>50 T A  = +25°C 49 TA = +25°C<br>CL [||]  RL = 1.8pF  [||]  500Ω CL [||]  RL = 1.8pF  [||]  500W<br>49 48<br>2.7 2.9 3.1 3.3 3.5 -20 5 30 55 80<br>SUPPLY VOLTAGE (V) TEMPERATURE (°C)<br>DS1088L toc01 DS1088L toc02 DS1088L toc03<br>SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) SUPPLY CURRENT (mA)<br>DS1088L toc04 DS1088L toc05 DS1088L toc06<br>FREQUENCY ERROR (%) FREQUENCY ERROR (%)<br>SHUTDOWN CURRENT (µA)<br>DS1088L toc07 DS1088L toc08<br>DUTY CYCLE (%) DUTY CYCLE (%)<br>**----- End of picture text -----**<br>


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## DS1088L 

## Fixed-Frequency EconOscillator™ 

## **Pin Configuration** 

**==> picture [504 x 141] intentionally omitted <==**

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TOP VIEW<br>+<br>OUT 1 8 DNC<br>VCC 2 DS1088L 7 DNC<br>VCC 3 6 PDN<br>GND 4 5 GND<br>µSOP<br>**----- End of picture text -----**<br>


## **Pin Description** 

|**PIN**|**NAME**|**FUNCTION**|
|---|---|---|
|1|OUT|Oscillator Output|
|2, 3|VCC|Power Supply|
|4, 5|GND|Ground|
|6|PDN|Active-Low Power-Down. When the pin is high, the oscillator is enabled. When the pin is low, the<br>oscillator is disabled (power-down mode).|
|7|DNC|Do Not Connect. The DNC pins are internally connected to ground.|
|8|DNC|Do Not Connect|



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## DS1088L 

## **Detailed Description** 

The DS1088L is a low-cost clock generator that produces a square-wave output without external timing components. The fixed-frequency oscillator is available in factory-calibrated frequencies from 312kHz to 133MHz. The device has a power-down pin for power-sensitive applications. A block diagram is shown in Figure 1. 

## **Output Frequency** 

The internal oscillator frequency is divided by the factoryprogrammed prescaler to produce an output frequency of 312kHz to 133MHz. Contact the factory for custom frequencies. 

## Fixed-Frequency EconOscillator™ 

## **Applications Information** 

## **Power-Supply Decoupling** 

To achieve the best results when using the DS1088L, the power supply must be decoupled with 0.01μF and 0.1μF high-quality, ceramic, surface-mount capacitors. Surfacemount components minimize lead inductance, which improves performance, and tend to have adequate highfrequency response for decoupling applications. These capacitors should be placed as close as possible to the VCC and GND pins. 

## **Chip Information** 

SUBSTRATE CONNECTED TO GROUND 

## **Power-Down Mode** 

The PDN pin disables the internal oscillator and the oscillator output for power-sensitive applications. The powerdown pin must remain low for at least two output frequency cycles plus 10μs for deglitching purposes. On power-up, the output is disabled until power is stable and the voltagecontrolled oscillator has generated 512 clock cycles. 

**==> picture [242 x 142] intentionally omitted <==**

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VCC<br>VCC<br>VOLTAGE-<br>EEPROM CONTROLLED PRESCALER OUT<br>CONTROL OSCILLATOR ÷ BY 1, 2, 4...256<br>PDN 80MHz TO 160MHz (312kHz<br>TO 133MHz)<br>GND<br>DS1088L<br>**----- End of picture text -----**<br>


_Figure 1. Block Diagram_ 

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## DS1088L 

## Fixed-Frequency EconOscillator™ 

## **Ordering Information** 

|**PART**|**FREQUENCY(MHz)**|**TEMP RANGE**|**PIN-PACKAGE**|
|---|---|---|---|
|DS1088LU-02+|2.048|-20°C to +85°C|8µSOP|
|DS1088LU-10+|10.0|-20°C to +85°C|8µSOP|
|DS1088LU-16+|16.6|-20°C to +85°C|8µSOP|
|DS1088LU-66+|66.6|-20°C to +85°C|8µSOP|
|DS1088LU-100+|100.0|-20°C to +85°C|8µSOP|
|DS1088LU-yyy+|(see note)|-20°C to +85°C|8µSOP|



_**Note:** For more information about custom frequencies, email_ **Custom_EconOscillators_Info@maximintegrated.com** _. +Denotes a lead(Pb)-free/RoHS-compliant package._ 

_yyy = frequency_ 

## **Package Information** 

For the latest package outline information and land patterns (footprints), go to **www.maximintegrated.com/packages** . Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. 

|**PACKAGE TYPE**|**PACKAGE CODE**|**OUTLINE NO.**|**LAND PATTERN NO.**|
|---|---|---|---|
|8 µSOP|U8+1|**21-0036**|**90-0092**|



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## DS1088L 

## Fixed-Frequency EconOscillator™ 

## **Revision History** 

|**Revision**|**History**|||
|---|---|---|---|
|**REVISION**<br>**NUMBER**|**REVISION**<br>**DATE**|**DESCRIPTION**|**PAGES**<br>**CHANGED**|
|0|10/04|Initial release|—|
|1|5/05|Updated the_Oscillator Characteristics_table and added Note 8|3|
|2|1/12|Added lead(Pb)-free ordering option to the_Ordering Information_table; added the lead<br>and soldering temperature information to the_Absolute Maximum Ratings_section|1, 2|
|3|4/15|Removed automotive reference from data sheet|1|



For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. 

_Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance._ 

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