M48T02-150PC1TR STMICROELECTRONICS [STMicroelectronics], M48T02-150PC1TR Datasheet - Page 3

• Manufacturer Part Number: M48T02-150PC1TR
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

SUMMARY DESCRIPTION
The M48T02/12 TIMEKEEPER
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-
Figure 2. Logic Diagram
Figure 3. DIP Connections
A0-A10
W
G
E
11
V CC
V SS
M48T02
M48T12
®
RAM is a 2Kb x 8
8
DQ0-DQ7
DQ0
DQ1
DQ2
V SS
AI01027
A7
A6
A5
A4
A3
A2
A1
A0
1
2
3
4
5
6
7
8
9
10
11
12
M48T02
M48T12
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.
Table 1. Signal Names
A0-A10
DQ0-DQ7
E
G
W
V
V
CC
SS
AI01028
24
23
22
21
20
19
18
17
16
15
14
13
V CC
A8
A9
W
G
A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
Address Inputs
Data Inputs / Outputs
Chip Enable
Output Enable
WRITE Enable
Supply Voltage
Ground
M48T02, M48T12
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