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
"Specs" "Value"
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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