M48T58 Datasheet, PDF (7/17 Pages) STMicroelectronics – 64 Kbit 8Kb x8 TIMEKEEPER SRAM

M48T58, M48T58Y
Table 10. Write Mode AC Characteristics
(TA = 0 to 70°C; VCC = 4.75V to 5.5V or 4.5V to 5.5V)
Symbol
Parameter
M48T58 / M48T58Y
-70
Min
Max
t_AVAV
Write Cycle Time
70
tAVWL
Address Valid to Write Enable Low
0
t_AVE1L
Address Valid to Chip Enable 1 Low
0
t_AVE2H
Address Valid to Chip Enable 2 High
0
t_WLWH
Write Enable Pulse Width
50
tE1LE1H
Chip Enable 1 Low to Chip Enable 1 High
55
t_E2HE2L
Chip Enable 2 High to Chip Enable 2 Low
55
t_WHAX
Write Enable High to Address Transition
0
t_E1HAX
Chip Enable 1 High to Address Transition
0
tE2LAX
Chip Enable 2 Low to Address Transition
0
t_DVWH
Input Valid to Write Enable High
30
t_DVE1H
Input Valid to Chip Enable 1 High
30
t_DVE2L
Input Valid to Chip Enable 2 Low
30
tWHDX
Write Enable High to Input Transition
5
t_E1HDX
Chip Enable 1 High to Input Transition
5
tE2LDX
t_WLQZ ^{(1, 2)}
Chip Enable 2 Low to Input Transition
Write Enable Low to Output Hi-Z
5
25
tAVWH
Address Valid to Write Enable High
60
t_AVE1H
Address Valid to Chip Enable 1 High
60
tAVE2L
Address Valid to Chip Enable 2 Low
60
t_WHQX ^{(1, 2)}
Write Enable High to Output Transition
5
Notes: 1. CL = 5pF (see Figure 4).
2. If E1 goes low or E2 high simultaneously with W going low, the outputs remain in the high impedance state.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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