Features: `Provides Battery Backup Power for Non-Volatile TIMEKEEPERs and Controllers in the SNAPHAT SOIC Package` Removable Battery Avoids Heat Associated with Surface Mount Process` Snaps Directly onto Surface-Mounted SNAPHAT SOIC` Choice of Battery Capacities M4T28-BR12SH = 48 mAh M4T32-BR12...
M4TXX-BR12SH: Features: `Provides Battery Backup Power for Non-Volatile TIMEKEEPERs and Controllers in the SNAPHAT SOIC Package` Removable Battery Avoids Heat Associated with Surface Mount Process` Snaps Directly...
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The M4Txx-BR12SH SNAPHAT top is a detachable lithium power source for ST's non-volatile TIMEKEEPER surface mount SOIC (MH) 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 the PC board. Thus the two piece solution avoids the battery and crystal from having to be exposed to the high temperatures of the surface mount process.