M48Z02 ST Microelectronics, M48Z02 Datasheet - Page 7

• Manufacturer Part Number: M48Z02
• Description: 16 Kbit 2Kb x 8 ZEROPOWER SRAM
• Manufacturer: ST Microelectronics

Table 10. Write Mode AC Characteristics
(T
WRITE MODE
The M48Z02/12 is in the Write Mode whenever W
and E are active. The start of a write is referenced
from the latter occurring falling edge of W or E. A
write is terminated by the earlier rising edge of W
or E. The addresses must be held valid throughout
the cycle. E or W must return high for a minimum
A
Symbol
= 0 to 70 C or –40 to 85 C; V
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
WHQX
WLWH
WHAX
DVWH
WHDX
WLQZ
AVWH
AVWL
EHAX
DVEH
EHDX
ELEH
AVEH
AVAV
AVEL
Write Cycle Time
Address Valid to Write Enable Low
Address Valid to Chip Enable Low
Write Enable Pulse Width
Chip Enable Low to Chip Enable High
Write Enable High to Address Transition
Chip Enable High to Address Transition
Input Valid to Write Enable High
Input Valid to Chip Enable High
Write Enable High to Input Transition
Chip Enable High to Input Transition
Write Enable Low to Output Hi-Z
Address Valid to Write Enable High
Address Valid to Chip Enable High
Write Enable High to Output Transition
Parameter
CC
= 4.75V to 5.5V or 4.5V to 5.5V)
Min
of t
Enable prior to the initiation of another read or write
cycle. Data-in must be valid t
of write and remain valid for t
should be kept high during write cycles to avoid bus
contention; although, if the output bus has been
activated by a low on E and G, a low on W will
disable the outputs t
70
50
55
30
30
60
60
0
5
0
0
0
5
5
EHAX
-70
Max
25
from Chip Enable or t
M48Z02 / M48Z12
Min
150
120
120
90
90
10
40
10
10
40
0
0
5
5
-150
WLQZ
Max
50
after W falls.
DVWH
Min
200
120
120
140
140
M48Z02, M48Z12
10
60
10
10
60
0
0
5
5
WHDX
WHAX
-200
prior to the end
Max
afterward. G
60
from Write
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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