M4T28-BR12SH1TR datasheet(3/12 Pages) STMICROELECTRONICS

Nome de Peças	M4T28-BR12SH1TR

Descrição Electrónicos	TIMEKEEPER SNAPHAT (BATTERY & CRYSTAL)

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Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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M4T28-BR12SH, M4T32-BR12SH

SUMMARY 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 prevents the battery

and crystal from being exposed to the high tem-

peratures of the surface mount process.

Figure 2. Logic Diagram

Table 1. Signal Names

AI02528

SNAPHAT

VBAT–

VBAT+

X1

X2

X1

Crystal Input

X2

Crystal Output

VBAT–

Negative Voltage

VBAT+

Positive Voltage

Nº de peça semelhante - M4T28-BR12SH1TR

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
STMicroelectronics	M4T28-BR12SH1TR	139Kb / 16P	TIMEKEEPER짰 SNAPHAT짰 (battery and crystal)
STMicroelectronics	M4T28-BR12SH1TR	135Kb / 16P	TIMEKEEPER SNAPHAT (battery and crystal)

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
STMicroelectronics	M4TXX-BR12SH	51Kb / 7P	TIMEKEEPER SNAPHAT Battery & Crystal November 1999
STMicroelectronics	M4T28-BR12SH1	135Kb / 16P	TIMEKEEPER SNAPHAT (battery and crystal)
Texas Instruments	BQ48SH-28X6	96Kb / 6P	[Old version datasheet] SNAPHAT WITH INTEGRATED BATTERY AND CRYSTAL
STMicroelectronics	M4ZXX-BR00SH	49Kb / 7P	ZEROPOWER SNAPHAT Battery November 1999
STMicroelectronics	M4Z28-BR00SH	163Kb / 12P	ZEROPOWER SNAPHAT (BATTERY)
Texas Instruments	BQ48SH	126Kb / 7P	[Old version datasheet] SNAPHAT??WITH INTEGRATED BATTERT AND CRYSTAL
Dallas Semiconductor	DS1286	234Kb / 13P	Watchdog Timekeeper
Holtek Semiconductor In...	HT1380	183Kb / 10P	Serial Timekeeper Chip
Holtek Semiconductor In...	HT1381-8SOPLF	172Kb / 10P	Serial Timekeeper Chip
STMicroelectronics	M48T212V	312Kb / 35P	3.3V TIMEKEEPER supervisor