M48T128V(2010) Просмотр технического описания (PDF) - STMicroelectronics

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M48T128V
(Rev.:2010)

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

STMicroelectronics 

M48T128Y, M48T128V

1

Description

Description

The M48T128Y/V TIMEKEEPER® RAM is a 128 Kb x 8 non-volatile static RAM and real-

time clock. The special DIP package provides a fully integrated battery-backed memory and

real-time clock solution. The M48T128Y/V directly replaces industry standard 128 Kb x 8

SRAM.

It also provides the non-volatility of Flash without any requirement for special WRITE timing

or limitations on the number of WRITEs that can be performed. The 32-pin, 600 mil DIP

hybrid houses a controller chip, SRAM, quartz crystal, and a long-life lithium button cell in a

single package.

Figure 1. Logic diagram

VCC

17

A0-A16

W

E

G

M48T128Y

M48T128V

8

DQ0-DQ7

Table 1.

Signal names

A0-A16

DQ0-DQ7

E

G

W

VCC

VSS

NC

VSS

Address inputs

Data inputs / outputs

Chip enable

Output enable

WRITE enable

Supply voltage

Ground

Not connected internally

AI02244

Doc ID 5746 Rev 6

5/23

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