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Battery and crystal

ST’s Battery and Crystal products are detachable lithium power sources housed in a special top called SNAPHAT®, that are compatible with Serial interface RTC SOH28 package and ST’s nonvolatile TIMEKEEPER® SRAM and Supervisor surface-mount SOH44 (MH) package. The SNAPHAT top contains both the battery and crystal and is designed to be “snapped on” after the SOIC is surface mounted on the PC board. The battery is available in 48mAh or 120mAh capacity and the crystal is a high precision one with 32.768 kHz nominal frequency. This two-piece solution prevents the battery and crystal from being exposed to the high temperatures of the surface mount process.

SNAPHAT® lithium coin cell battery with crystal

To make designing with real-time clock ICs even easier, ST offers a battery life calculation simulator. It allows to evaluate the battery capacity consumption and lifetime of ST's real-time clock ICs.

The SNAPHAT® modules are compatible with SOH28 SMD Serial RTC devices (I2C or SPI Interface) and SOH28 and SOH44 Parallel RTC devices:

Parallel Interface Serial interface
M48T08Y-10MH1F M41ST85WMH6F
M48T201V-85MH1F M41T11MH6F
M48T201Y-70MH1F M41T94MH6F
M48T35AV-10MH1F  
M48T35Y-70MH1F  
M48T37V-10MH1F  
M48T37Y-70MH1F  
M48T58Y-70MH1F  

 

Product types:

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M4Txx-BR12SH SNAPHAT® portfolio, detachable lithium power source for ST’s serial real-time clock and nonvolatile TIMEKEEPER® surface-mount SOIC package

Benefits

  • Space saving
  • Spare part easy replacement
  • No soldering/de-soldering needed.