M4T28-BR12SH 데이터 시트보기 (PDF) - STMicroelectronics
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M4T28-BR12SH Datasheet PDF : 16 Pages
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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
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