SiTime, Silicon MEMS Oscillators and Clock Generators

SiT1542 Ultra-Small 32 kHz Oscillator for Unregulated Li+ Apps

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ace awards 2014The SiT1542 is the is the world's smallest, lowest power 32 kHz oscillator optimized for unregulated Li+ battery powered applications where the supply voltage must track the Li+ battery voltage from 4.5V down to 2.7V. SiTime's silicon MEMS technology enables the smallest footprint and chip-scale packaging. This device reduces the 32kHz footprint by as much as 85% compared to existing 2.0 x 1.2 mm SMD XTAL packages. Unlike XTALs, the SiT1542 NanoDrive™ reduced swing oscillator output directly interfaces to the MCU/PMIC/Chipset XTAL input while minimizing power and enabling greater component placement flexibility. In addition, the oscillator output is insensitive to load capacitance and eliminates external load capacitors.




Frequency (kHz) 32.768
Frequency Tolerance 20 PPM
Temp Range (°C) -10 to +70, -40 to +85
Supply Voltage (V) 2.7V – 4.5V
NanoDrive™ Reduced Swing Programmable Output Range 250mV to 1.15V
Package LxWxH (mm) 1.5 x 0.8 x 0.55
Status Contact Factory
  • Smartphones
  • Tablets
  • Health and Wellness Monitors
  • Fitness Watches
  • Sport Video Camcorders
  • Wireless Keypads
  • Ultra-Small Notebook PC 
  • RTC reference Clock
  • Medical Monitoring
  • Battery Management Timekeeping

Features Benefits
  • Smallest footprint in chip-scale (CSP): 1.5 x 0.8mm
  • Saves board space
  • Ultra-low power: 900nA (typ)
  • Extends battery life
  • 2.7V – 4.5V operating supply voltage range
  • Optimized to operate directly from an unregulated Li+ battery
  • NanoDrive™ reduced swing oscillator output
  • Directly interfaces to XTAL IN pin (Oscillator input)
  • Programmable ouput swing minimizes power
  • Osciilator output eliminates load capacitors
  • No load or Vdd filtering capacitors
  • Eliminates all external capacitors
  • Eliminates load dependent start-up issues common with quartz XTALs
  • <100 PPM frequency stability over -40°C to +85°C temp range
  • 2x better stability compared to quartz
  • Improves wireless connectivity and RTC accuracy

Coming Soon
Coming Soon 

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


If you do not know the output voltage requirements to define the proper NanoDrive settings, we recommend the default setting for initial evaluation.

DC-Coupled Receiver
VOH = 1.1V
VOL = 0.4V



Reliability Report
Coming soon