M4T28-BR12SH, M4T32-BR12SH Datasheet - STMicroelectronics

M4T28-BR12SH Real-time clock and TIMEKEEPER SNAPHAT battery

The M4Txx-BR12SH SNAPHAT® top is a detachable lithium power source for ST’s serial real-time clock and non-volatile TIMEKEEPER® surface-mount SOIC package (28- and 44-pin). The SNAPHAT top contains both the battery and crystal and is designed to be “snapped on” after the SOIC is surface mounted on t.

M4T28-BR12SH Features

* Provides battery backup power for serial realtime clock, non-volatile TIMEKEEPER® and supervisor devices in the 28- or 44-pin SNAPHAT® SOIC package

* Removable battery avoids heat associated with surface-mount process

* Snaps directly onto surface-mounted SNAPHAT SOIC

M4T32-BR12SH_STMicroelectronics.pdf