M48Z08_05 Datasheet, PDF (3/16 Pages) STMicroelectronics – 5V, 64 Kbit (8Kb x 8) ZEROPOWER® SRAM

M48Z08, M48Z18
SUMMARY DESCRIPTION
The M48Z08/18 ZEROPOWER^® RAM is a 8K x 8
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.
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.
Figure 2. Logic Diagram
VCC
13
A0-A12
W
E
G
M48Z08
M48Z18
8
DQ0-DQ7
Table 1. Signal Names
A0-A12
Address Inputs
DQ0-DQ7 Data Inputs / Outputs
E
Chip Enable
G
Output Enable
W
WRITE Enable
V_CC
Supply Voltage
V_SS
Ground
NC
Not Connected Internally
VSS
AI01022
Figure 3. DIP Connections
NC 1
A12 2
28 VCC
27 W
A7 3
26 NC
A6 4
25 A8
A5 5
24 A9
A4 6
23 A11
A3 7 _M48Z08 22 G
A2 8 M48Z18 21 A10
A1 9
20 E
A0 10
19 DQ7
DQ0 11
18 DQ6
DQ1 12
17 DQ5
DQ2 13
16 DQ4
VSS 14
15 DQ3
AI01183
3/16