M48T128V datasheet(1/22 Pages) STMICROELECTRONICS

Part #	M48T128V

Description	3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM

PDF	22 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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February 2005

M48T128Y

M48T128V*

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

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

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

PMDIP32 (PM)

Module

32

1

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M48T128V Datasheet(PDF) 1 Page - STMicroelectronics

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