M28256 查看數據表（PDF） - STMicroelectronics
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M28256 Datasheet PDF : 20 Pages
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M28256
Table 9A. Write Mode AC Characteristics for M28256 (5V range)
(TA = 0 to 70 °C or -40 to 85 °C; VCC = 4.5 to 5.5 V)
Symbol Alt.
Parameter
Test Condit ion
tAVWL tAS Address Valid to Write Enable Low
tAVEL tAS Address Valid to Chip Enable Low
tELWL tCES Chip Enable Low to Write Enable Low
tGHWL tOES Output Enable High to Write Enable Low
tGHEL tOES Output Enable High to Chip Enable Low
tWLEL tWES Write Enable Low to Chip Enable Low
tWLAX tAH Write Enable Low to Address Transition
tELAX tAH Chip Enable Low to Address Transition
tWLDV tDV Write Enable Low to Input Valid
tELDV tDV Chip Enable Low to Input Valid
tELEH tWP Chip Enable Low to Chip Enable High
tWHEH tCEH Write Enable High to Chip Enable High
tWHGL tOEH Write Enable High to Output Enable Low
tEHGL tOEH Chip Enable High to Output Enable Low
tEHWH tWEH Chip Enable High to Write Enable High
tWHDX tDH Write Enable High to Input Transition
tEHDX tDH Chip Enable High to Input Transition
tWHWL tWPH Write Enable High to Write Enable Low
tWLWH tWP Write Enable Low to Write Enable High
tWLQ5H tBLC Time-out after last byte write
tQ5HQ5X tWC Write Cycle Time
tWL
Write Enable Input Filter Pulse Width
tEL
Chip Enable Input Filter Pulse Width
tDVWH tDS Data Valid before Write Enable High
tDVEH tDS Data Valid before Chip Enable High
Note: 1. Characterized only; not tested in production.
E = VIL, G = VIH
G = VIH, W = VIL
G = VIH
E = VIL
W = VIL
G = VIH
E = VIL, G = VIH
G = VIH, W = VIL
Note 1
Note 1
M28256
Min
Max
0
0
0
0
0
0
50
50
1
1
50
0
0
0
0
0
0
50
1000
50
150
5
10
10
50
50
Unit
ns
ns
ns
ns
ns
ns
ns
ns
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ms
ns
ns
ns
ns
10/20
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