M48T128Y-85PM1 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M48T128Y-85PM1

5.0 or 3.3V, 1 Mbit (128 Kb x 8) TIMEKEEPER ®SRAM

STMicroelectronics 

M48T128Y

M48T128V*

5.0 or 3.3V, 1 Mbit (128 Kb x 8) TIMEKEEPER® SRAM

FEATURES SUMMARY

■ INTEGRATED, ULTRA LOW POWER SRAM,

REAL TIME CLOCK, POWER-FAIL

CONTROL CIRCUIT, BATTERY, AND

CRYSTAL

■ BCD CODED YEAR, MONTH, DAY, DATE,

HOURS, MINUTES, AND SECONDS

■ AUTOMATIC POWER-FAIL CHIP

DESELECT AND WRITE PROTECTION

■ WRITE PROTECT VOLTAGES

(VPFD = Power-fail Deselect Voltage):

– M48T128Y: VCC = 4.5 to 5.5V

4.1V ≤ VPFD ≤ 4.5V

– M48T128V*: VCC = 3.0 to 3.6V

2.7V ≤ VPFD ≤ 3.0V

■ CONVENTIONAL SRAM OPERATION;

UNLIMITED WRITE CYCLES

■ SOFTWARE CONTROLLED CLOCK

CALIBRATION FOR HIGH ACCURACY

APPLICATIONS

■ 10 YEARS OF DATA RETENTION AND

CLOCK OPERATION IN THE ABSENCE OF

POWER

■ SELF-CONTAINED BATTERY AND

CRYSTAL IN THE DIP PACKAGE

■ PIN AND FUNCTION COMPATIBLE WITH

JEDEC STANDARD 128K x 8 SRAMs

Figure 1. 32-pin PMDIP Module

32

1

PMDIP32 (PM)

Module

* Contact local ST sales office for availability of 3.3V version.

February 2005

1/22

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