M4T32BR12SH View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

M4T32BR12SH

TIMEKEEPER® SNAPHAT® (battery and crystal)

STMicroelectronics 

M4T28-BR12SH, M4T32-BR12SH

1

Description

Description

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 prevents

the battery and crystal from being exposed to the high temperatures of the surface mount

process.

Figure 1. Logic diagram

X1

X2

SNAPHAT

VBAT– VBAT+

Table 1.

X1

X2

VBAT–

VBAT+

Signal names

Crystal input

Crystal output

Negative voltage

Positive voltage

AI02528

5/16

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