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PDF M4T28-BR12SH6 Data sheet ( Hoja de datos )

Número de pieza M4T28-BR12SH6
Descripción TIMEKEEPER SNAPHAT Battery & Crystal
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo



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M4TXX-BR12SH
TIMEKEEPER SNAPHAT (Battery & Crystal)
s Provides Battery Backup Power for Non-Volatile
TIMEKEEPERs and Controllers in the
SNAPHAT SOIC Package
s Removable Battery Avoids Heat Associated
with Surface Mount Process
s Snaps Directly onto Surface-Mounted
SNAPHAT SOIC
s Choice of Battery Capacities
– M4T28-BR12SH = 48 mAh
– M4T32-BR12SH = 120 mAh
s Keyed Insertion to Insure Proper Assembly
s Removable for Replacement and Proper
Disposal
s Available in Tubes or Tape & Reel
s For Use with the 28 and 44 pin SOIC Versions
of the TIMEKEEPER Product Families
SNAPHAT (SH)
Battery & Crystal
Figure 1. Logic Diagram
DESCRIPTION
The M4Txx-BR12SH SNAPHAT top is a detach-
able lithium power source for ST’s non-volatile
TIMEKEEPER surface mount SOIC (MH) pack-
age (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 tem-
peratures of the surface mount process.
X1 X2
SNAPHAT
VBAT– VBAT+
AI02528
November 1999
1/7

1 page




M4T28-BR12SH6 pdf
M4TXX-BR12SH
Table 3. M4T28-BR12SH - TIMEKEEPER 4-pin SNAPHAT Housing for 48 mAh Battery & Crystal,
Package Mechanical Data
mm inches
Symb
Typ Min Max Typ Min Max
A
9.78
0.385
A1
6.73
7.24
0.265
0.285
A2
6.48
6.99
0.255
0.275
A3
0.38
0.015
B
0.46
0.56
0.018
0.022
D
21.21
21.84
0.835
0.860
E
14.22
14.99
0.560
0.590
eA
15.55
15.95
0.612
0.628
eB
3.20
3.61
0.126
0.142
L
2.03
2.29
0.080
0.090
Figure 5. M4T28-BR12SH - TIMEKEEPER 4-pin SNAPHAT Housing for 48 mAh Battery & Crystal,
Package Outline
A1 A
A2
A3
eA B L
D eB
Drawing is not to scale.
E
SHTK-A
5/7

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