M48T37Y datasheet(4/29 Pages) STMICROELECTRONICS

No. de pieza	M48T37Y

Descripción Electrónicos	3.3V-5V 256 Kbit 32Kb x8 TIMEKEEPER SRAM

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Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

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M48T37Y, M48T37V

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SUMMARY DESCRIPTION

The M48T37Y/V TIMEKEEPER® RAM is a 32 Kb

x8 non-volatile static RAM and real time clock. The

monolithic chip is available in a special package

which provides a highly integrated battery backed-

up memory and real time clock solution.

The 44-lead, 330mil SOIC package provides sock-

ets with gold-plated contacts at both ends for di-

rect connection to a separate SNAPHAT housing

containing the battery and crystal. The unique de-

sign allows the SNAPHAT® battery/crystal pack-

age to be mounted on top of the SOIC package

after the completion of the surface mount process.

Insertion of the SNAPHAT housing after reflow

prevents potential battery and crystal damage due

to the high temperatures required for device sur-

face-mounting. The SNAPHAT housing is keyed

to prevent reverse insertion.

The SOIC and battery packages are shipped sep-

arately in plastic anti-static tubes or in Tape &Reel

form. For the 44-lead SOIC, the battery/crystal

package (e.g., SNAPHAT) part number is “M4T28-

BR12SH”

or

“M4T32-BR12SH”

(see

Table

18., page 27).

Caution: Do not place the SNAPHAT battery/crys-

tal top in conductive foam, as this will drain the lith-

ium button-cell battery.

Figure 2. Logic Diagram

Table 1. Signal Names

AI02172

8

DQ0-DQ7

W

VCC

M48T37Y

M48T37V

VSS

G

E

WDI

RST

IRQ/FT

15

A0-A14

Address Inputs

DQ0-DQ7

Data Inputs / Outputs

RST

Reset Output (Open Drain)

IRQ/FT

Interrupt / Frequency Test Output

(Open Drain)

WDI

Watchdog Input

E

Chip Enable

G

Output Enable

W

WRITE Enable

VCC

Supply Voltage

VSS

Ground

NC

Not connected Internally

Número de pieza similar - M48T37Y

Fabricante Electrónico	No. de pieza	Datasheet	Descripción Electrónicos
STMicroelectronics	M48T37Y	521Kb / 30P	5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER짰 SRAM
	M48T37Y-10MH1	521Kb / 30P	5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER짰 SRAM
	M48T37Y-10MH1E	521Kb / 30P	5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER짰 SRAM
	M48T37Y-10MH1F	521Kb / 30P	5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER짰 SRAM
	M48T37Y-10MH1TR	521Kb / 30P	5.0 or 3.3 V, 256 Kbit (32 Kbit x 8) TIMEKEEPER짰 SRAM

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Descripción similar - M48T37Y

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STMicroelectronics	M48T35	142Kb / 18P	256 Kbit 32Kb x8 TIMEKEEPER SRAM
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M48T37Y Datasheet(PDF) 4 Page - STMicroelectronics

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Número de pieza similar - M48T37Y

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