M48T02 datasheet(3/19 Pages) STMICROELECTRONICS

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M48T02, M48T12

SUMMARY DESCRIPTION

The M48T02/12 TIMEKEEPER® RAM is a 2Kb x 8

non-volatile static RAM and real time clock which

is pin and functional compatible with the DS1642.

A special 24-pin, 600mil DIP CAPHAT™ package

houses the M48T02/12 silicon with a quartz crystal

and a long life lithium button cell to form a highly

integrated battery backed-up memory and real

time clock solution.

The M48T02/12 button cell has sufficient capacity

and storage life to maintain data and clock func-

tionality for an accumulated time period of at least

10 years in the absence of power over the operat-

ing temperature range.

The M48T02/12 is a non-volatile pin and function

equivalent to any JEDEC standard 2Kb x 8 SRAM.

It also easily fits into many ROM, EPROM, and

EEPROM sockets, providing the non-volatility of

PROMs without any requirement for special

WRITE timing or limitations on the number of

WRITEs that can be performed.

Figure 2. Logic Diagram

Table 1. Signal Names

Figure 3. DIP Connections

AI01027

A0-A10

DQ0-DQ7

VCC

M48T02

M48T12

VSS

A0-A10

Address Inputs

DQ0-DQ7

Data Inputs / Outputs

Chip Enable

Output Enable

WRITE Enable

VCC

Supply Voltage

VSS

Ground

DQ0

A10

DQ7

DQ5

DQ1

DQ2

DQ3

VSS

DQ4

DQ6

VCC

AI01028

M48T02

M48T12

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