SiTime, Silicon MEMS Oscillators and Clock Generators

SiT1568 Super-TCXO with Auto-Calibration

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 SiTime's TempFlat MEMS(TM) technology enables the first 32 kHz ±5 PPM Super-TCXO in a 1.2mm2 chip-scale package. The SiT1568 is factory calibrated over multiple temperature points to guarantee ±5 PPM all-inclusive frequency stability.  And unlike any other TCXO on the market, this ultra-samll TCXO includes a one-time, in-system auto-calibration feature that cancels out post-assembly board stressors such as overmold and underfill.  The result is a 32kHz TCXO that maintains ±5 PPM all-inclusive stability in a tiny 1.2mm2 footprint, ideal for wearables, modules, and tiny IoT applications.




Frequency (kHz) 32.768
Frequency Stability (PPM)
 ±5 all-inclusive, after overmold/underfill and in-system auto-calibration
Temp Range (°C) -20 to +70, -40 to +85
Supply Voltage (V) 1.8 ±10%

Package LxWxH (mm) 1.5 x 0.8 x 0.6
Status Sampling
  • Smart Utility water, Gas, and Electricity Meters (AMR)
  • Smart Watches
  • Health & Wellness Monitors
  • Connectivity Modules

Features Benefits
  • ±5 ppm all-inclusive stability after overmold/underfill
  • Maintains ±5 PPM stability after overmold/underfilll for improved local timekeeping and improved system power
  • Smallest footprint in chip-scale (CSP): 1.5 x 0.8 mm
  • Saves board space
  • In-system auto-calibration enables overmold
  • Eliminates (cancels) board related stressors after assembly
  • Drives multiple loads
  • Eliminates multiple discrete XTALs + load caps
  • Internal VDD supply filtering
  • Eliminates external VDD bypass capacitor to maintain ultra-small footprint
  • Low jitter 4 nsRMS max integrated phase jitter (IPJ)
  • Suitable for audio applications, eliminates discrete MHz XTAL



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



Reliability Report Composition Reports
Available May 2016
icon WLCSP Package Composition Report