SiT1252 Embedded MEMS kHz Resonator


The SiT1252 is SiTime’s second-generation 524 kHz resonator with improved resistance to mechanical stressors such as overmold and underfill. The SiT1252 utilizes SiTime’s TempFlat™ technology that results in a MEMS resonator with ±100 ppm frequency stability over the -40°C to 85°C temperature range. Other features include a low sustaining amplifier and extremely small die size.


Smallest and thinnest resonator fully encapsulated within silicon die for easy integration into semiconductor package
Frequency 524 kHz
Frequency Stability (ppm) ±100 over temp
Operating Temperature Range (°C) -40 to +85, -40 to +125
Package Type (mm²) 0.42 x 0.42, KGD (known good die)
Availability Production

100% silicon die, can be easily integrated inside standard semiconductor packages

  • Eliminates external RTC clock to save board space

  • Simplifies design and BOM

Smallest and thinnest resonator for real-time clock and time-keeping applications

  • Enables the smallest embedded solution

± 5 PPM stability on real-time clock

  • Most cost-effective solution for ±5 ppm RTC reference

System current of less than 1 μA

  • Enables low power applications

50,000 g of shock and 70 g of vibration resistance, 10 times better than quartz

  • Suitable for high-reliability applications where quartz cannot be used

MEMS resonator integration benefits semiconductor devices

  • Microprocessors

  • Microcontrollers

  • Application Processors for Mobile

  • Real-Time Clock ICs

  • Low-Power Radios

  • Sensor Node ICs

  • Watch ICs


  • Embedded wearable SoC sleep timing
  • Biometric sensing
  • Wireless charging
  • Metering SoC
  • RTC reference clock
  • Portable medical devices

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Document Name Type
SiTime Conflict Minerals Policy Other Quality Documents
ISO9001:2015 Certificate of Registration Other Quality Documents
SiT1252 Die Resonator Qualification Report Reliability Reports

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