m48z18 STMicroelectronics, m48z18 Datasheet - Page 3

• Manufacturer Part Number: m48z18
• Description: 5v, 64 Kbit 8kb X 8 Zeropower Sram
• Manufacturer: STMicroelectronics

SUMMARY DESCRIPTION
The M48Z08/18 ZEROPOWER
non-volatile static RAM which is pin and functional
compatible with the DS1225.
The monolithic chip is available in two special
packages to provide a highly integrated battery
backed-up memory solution.
The M48Z08/18 is a non-volatile pin and function
equivalent to any JEDEC standard 8K x 8 SRAM.
Figure 2. Logic Diagram
Figure 3. DIP Connections
A0-A12
W
G
E
DQ0
DQ1
DQ2
V SS
A12
NC
A7
A6
A5
A4
A3
A2
A1
A0
13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
V CC
V SS
M48Z08
M48Z18
M48Z08
M48Z18
AI01183
28
27
26
25
24
23
22
21
20
19
18
17
16
15
®
RAM is a 8K x 8
8
V CC
W
NC
A8
A9
A11
G
A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
DQ0-DQ7
AI01022
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.
The 28-pin, 600mil DIP CAPHAT™ houses the
M48Z08/18 silicon with a long life lithium button
cell in a single package.
Table 1. Signal Names
A0-A12
DQ0-DQ7
E
G
W
V
V
NC
CC
SS
Address Inputs
Data Inputs / Outputs
Chip Enable
Output Enable
WRITE Enable
Supply Voltage
Ground
Not Connected Internally
M48Z08, M48Z18
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