M48T37 ST Microelectronics, M48T37 Datasheet - Page 9

• Manufacturer Part Number: M48T37
• Description: 3.3V-5V 256 Kbit 32Kb x8 TIMEKEEPER SRAM
• Manufacturer: ST Microelectronics

Table 10. Write Mode AC Characteristics
(T
Note: 1. C
A
t
t
WHQX
WLQZ
Symbol
= 0 to 70 C or –40 to 85 C)
t
t
t
t
t
t
t
t
t
t
t
t
t
WLWH
2. If E goes low simultaneously with W going low, the outputs remain in the high impedance state.
WHAX
DVWH
WHDX
AVWH
AVWL
EHAX
DVEH
EHDX
AVEL
ELEH
AVEH
AVAV
(1, 2)
(1, 2)
L
= 5pF.
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
V
CC
Min
70
50
55
30
30
60
60
0
0
0
0
5
5
5
M48T37Y
= 4.5V to 5.5V
-70
Max
25
V
CC
Min
100
80
80
10
10
50
50
80
80
10
0
0
5
5
M48T37V
= 3.0V to 3.6V
M48T37Y, M48T37V
-10
Max
50
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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