List of figures M48Z08, M48Z18
4/20 Doc ID 2424 Rev 8
List of figures
Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. DIP connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. READ mode AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 5. WRITE enable controlled, WRITE mode AC waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 6. Chip enable controlled, WRITE mode AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 7. Supply voltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 8. AC testing load circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 9. Power down/up mode AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 10. PCDIP28 – 28-pin plastic DIP, battery CAPHAT™, package outline . . . . . . . . . . . . . . . . . 16
Figure 11. Recycling symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
M48Z08, M48Z18 Description
Doc ID 2424 Rev 8 5/20
1 Description
The M48Z08/18 ZEROPOWER
®
RAM is an 8 K x 8 non-volatile static RAM which is pin and
function compatible with the DS1225.
The monolithic chip provides a highly integrated battery-backed memory solution.
The M48Z08/18 is a non-volatile pin and function equivalent to any JEDEC standard 8 K 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, 600 mil DIP CAPHAT
houses the M48Z08/18 silicon with a long-life lithium
button cell in a single package.
Figure 1. Logic diagram
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
AI01022
13
A0-A12
W
DQ0-DQ7
V
CC
M48Z08
M48Z18
G
V
SS
8
E
Description M48Z08, M48Z18
6/20 Doc ID 2424 Rev 8
Figure 2. DIP connections
Figure 3. Block diagram
A1
A0
DQ0
A7
A4
A3
A2
A6
A5
NC
A10
A8
A9
DQ7
W
A11
G
E
DQ5DQ1
DQ2
DQ3V
SS
DQ4
DQ6
A12
NC V
CC
AI01183
M48Z08
M48Z18
8
1
2
3
4
5
6
7
9
10
11
12
13
14
16
15
28
27
26
25
24
23
22
21
20
19
18
17
AI01394
LITHIUM
CELL
V
PFD
V
CC
V
SS
VOLTAGE SENSE
AND
SWITCHING
CIRCUITRY
8K x 8
SRAM ARRAY
A0-A12
DQ0-DQ7
E
W
G
POWER

M48Z08-100PC1

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
NVRAM 64K (8Kx8) 100ns
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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