Low Power Timers


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Silicon Labs low power timer family includes the industry’s first and only single-supply CMOS oscillator fully specified to operate at 1 V while consuming a 1μA supply current at an output frequency of 25 kHz (TS3001, TS3002). These oscillators are compact, easy-to-use and versatile. Optimized for ultra-long life, battery-powered applications, these low power timers can operate from single-supply voltages from 0.9 V to 1.8 V. The family also includes parts that operate from 1.55V to 5.5V supplies and consume less than 2μA.

Requiring only a resistor and a capacitor to set the output frequency, the TS3002 represents a 66% reduction in pcb area and a factor-of-10 reduction in power consumption over other CMOS-based integrated circuit oscillators. When compared against industry-standard 555-timer-based products, the TS3002 offers up to 93% reduction in pcb area and four orders of magnitude lower power consumption.The TS3002 is fully specified over the -40°C to +85°C temperature range and is available in a low-profile, 8-pin 2 x 2 mm TDFN package with an exposed back-side paddle.



  • Ultra Low Supply Current
  • Supply Voltage Operation
  • Programmable Frequency or Period Range
  • Single Resistor (and Capacitor) Set Output Frequency
  • PWMOUT Duty Cycle Range: 12% to 90%

Low Power Timer Product Matrix

Part Number Data Sheet Programming Vdd min (V) Vdd max ( V) Idd max (μA) Frequency Range Min (MHz) (MHz) Frequency Range Max (MHz) (MHz) Fout Period Temp Coef Initial Accuracy PWM Output Package Type
Resister Only 0.9 1.8 1 0.005 0.09 0.02% 3% Yes TDFN22EP-8
Resister and Capacitor 0.9 1.8 1 0.005 0.29 0.04% 3% Yes TDFN22EP-8
Resister Only 1.55 5.25 1.9 0.01 0.03 0.02% 3% Yes TDFN33EP-10
Resister Only 1.55 5.25 1.9 0.00000476 0.3 0.02% 3% Yes TDFN33EP-10
Resister Only 1.55 5.25 1.9 1.7 ms 33 hr 0.02% 3% Yes TDFN33EP-10
Resister Only 1.55 5.25 1.9 0.009 0.3 0.02% 3% No TDFN33EP-8
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