M48Z129YPM datasheet(1/13 Pages) STMICROELECTRONICS

Part #	M48Z129YPM

Description	3.3V/5V 1 Mbit 128Kb x8 ZEROPOWER SRAM

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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June 2000

M48Z129Y

M48Z129V

3.3V/5V 1 Mbit (128Kb x8) ZEROPOWER® SRAM

s

INTEGRATED ULTRA LOW POWER SRAM,

POWER-FAIL CONTROL CIRCUIT, and

BATTERY

s

AUTOMATIC POWER-FAIL CHIP DESELECT

AND WRITE PROTECTION

s

MICROPROCESSOR POWER-ON RESET

(RESET VALID EVEN DURING BATTERY

BACK-UP MODE)

s

BATTERY LOW PIN - PROVIDES WARNING

OF BATTERY END-OF-LIFE

s

WRITE PROTECT VOLTAGES

(VPFD = Power-fail Deselect Voltage):

– M48Z129Y: 4.2V

≤ VPFD ≤ 4.5V

– M48Z129V: 2.7V

≤ VPFD ≤ 3.0V

s

CONVENTIONAL SRAM OPERATION;

UNLIMITED WRITE CYCLES

s

10 YEARS OF DATA RETENTION IN THE

ABSENCE OF POWER

s

PIN AND FUNCTION COMPATIBLE WITH

JEDEC STANDARD 128Kb x 8 SRAMS

s

SELF CONTAINED BATTERY IN DIP

PACKAGE

Figure 1. Logic Diagram

AI02309

17

A0-A16

DQ0-DQ7

VCC

M48Z129Y

M48Z129V

G

VSS

8

E

W

RST

BL

Table 1. Signal Names

A0-A16

Address Inputs

DQ0-DQ7

Data Inputs / Outputs

E

Chip Enable

G

Output Enable

W

Write Enable

RST

Reset Output (Open Drain)

BL

Battery Low Output (Open

Drain)

VCC

Supply Voltage

VSS

Ground

32

1

PMDIP32 (PM)

Module

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