M48T02, M48T12

Description

Doc ID 2410 Rev 8

5/25

1

Description

clock which is pin and functional compatible with the DS1642.

quartz crystal and a long life lithium button cell to form a highly integrated battery-backed

memory and real-time clock solution.

The M48T02/12 button cell has sufficient capacity and storage life to maintain data and

clock functionality for an accumulated time period of at least 10 years in the absence of

power over the operating temperature range.

The M48T02/12 is a non-volatile pin and function equivalent to any JEDEC standard

2 Kb 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 1.

Logic diagram

Table 1.

Signal names

A0-A10

Address inputs

DQ0-DQ7

Data inputs / outputs

E

Chip enable

G

Output enable

W

WRITE enable

Supply voltage

Ground

AI01027

11

A0-A10

W

DQ0-DQ7

VCC

M48T02

M48T12

G

VSS

8

E