M48T12 查看數據表（PDF） - STMicroelectronics

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M48T12

5.0V, 16 Kbit (2Kb x 8) TIMEKEEPER® SRAM

STMicroelectronics 

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

VCC

11

A0-A10

8

DQ0-DQ7

W

M48T02

M48T12

E

G

Table 1. Signal Names

A0-A10

Address Inputs

DQ0-DQ7 Data Inputs / Outputs

E

Chip Enable

G

Output Enable

W

WRITE Enable

VCC

Supply Voltage

VSS

Ground

VSS

Figure 3. DIP Connections

AI01027

A7 1

A6 2

24 VCC

23 A8

A5 3

22 A9

A4 4

21 W

A3 5

20 G

A2 6 M48T02 19 A10

A1 7 M48T12 18 E

A0 8

17 DQ7

DQ0 9

16 DQ6

DQ1 10

15 DQ5

DQ2 11

14 DQ4

VSS 12

13 DQ3

AI01028

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