SiTime, Silicon MEMS Oscillators and Clock Generators

SiT1552 Ultra-Small, Precision 32 kHz TCXO

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 EDN-2014-Hot-100-Logo-smSiTime's TempFlat MEMS technology enables the first 32 kHz TCXO in a 1.2mm2 chip-scale package, the world's smallest footprint. Typicalcore supply current is only 1μA.  And unlike standard oscillators, the SiT1552 features NanoDrive™, a factory programmable output that reduces voltage swing to minimize power. The SiT1552 is factory calibrated over multiple temperature points to guarantee extremely tight frequency stability from ±10 ppm to ±20 ppm (initial + over temperature).

Video Demo Watch dynamic frequency over temperature: The SiT1552 is placed in temperature chamber that increases temp from < -40 to +85°C at a fast ramp rate of 4 degrees per second.




Frequency (kHz) 32.768
Total Frequency Stability (PPM)
 ±10, ±13, ±22
Temp Range (°C) 0 to +70, -40 to +85
Supply Voltage (V) 1.5 to 3.63
NanoDrive™ Reduced Swing Programmable Output Range 200 mV to 800 mV or rail-to-rail LVCMOS
Package LxWxH (mm) 1.5 x 0.8 x 0.6
Status Production
  • Smart Meters (AMR)
  • Health & Wellness Monitors
  • Pulse-per-Second Timekeeping

Features Benefits
  • ±5 ppm frequency stability over temperature
  • Improved local timekeeping and improved system power with less dependency on network timekeeping updates with mobile and wearable devices
  • Smallest footprint in chip-scale (CSP): 1.5 x 0.8 mm
  • Saves board space
  • Ultra-low power: 990 nA (typ)
  • Maximizes battery life
  • NanoDrive™ reduced swing oscillator output
  • Programmable ouput swing minimizes power
  • Internal VDD supply filtering
  • Eliminates external VDD bypass capacitor to maintain ultra-small footprint



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