M4T28-BR12SH_08 STMICROELECTRONICS [STMicroelectronics], M4T28-BR12SH_08 Datasheet - Page 5

• Manufacturer Part Number: M4T28-BR12SH_08
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M4T28-BR12SH, M4T32-BR12SH
1
Description
The M4TXX-BR12SH SNAPHAT
volatile TIMEKEEPER
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.
Table 1.
X1
X2
V
V
BAT–
BAT+
Logic diagram
Signal names
®
surface-mount SOIC (MH) package (28- and 44-pin).
Crystal input
Crystal output
Negative voltage
Positive voltage
®
top is a detachable lithium power source for ST’s non-
V BAT–
X1
SNAPHAT
V BAT+
X2
AI02528
Description
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