M28W640 データシートの表示（PDF） - STMicroelectronics
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M28W640 Datasheet PDF : 54 Pages
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M28W640CT, M28W640CB
Table 16. Write AC Characteristics, Write Enable Controlled
Symbol Alt
Parameter
tAVAV
tWC Write Cycle Time
Min
tAVWH
tAS Address Valid to Write Enable High
Min
tDVWH
tDS Data Valid to Write Enable High
Min
tELWL
tCS Chip Enable Low to Write Enable Low
Min
tELQV
Chip Enable Low to Output Valid
Min
tQVVPL (1,2)
Output Valid to VPP Low
Min
tQVWPL
Output Valid to Write Protect Low
Min
tVPHWH (1) tVPS VPP High to Write Enable High
Min
tWHAX
tAH Write Enable High to Address Transition Min
tWHDX
tDH Write Enable High to Data Transition
Min
tWHEH
tCH Write Enable High to Chip Enable High
Min
tWHEL
Write Enable High to Chip Enable Low
Min
tWHGL
Write Enable High to Output Enable Low Min
tWHWL tWPH Write Enable High to Write Enable Low
Min
tWLWH
tWP Write Enable Low to Write Enable High
Min
tWPHWH
Write Protect High to Write Enable High Min
Note: 1. Sampled only, not 100% tested.
2. Applicable if VPP is seen as a logic input (VPP < 3.6V).
M28W640C
80
90
80
90
45
50
45
50
0
0
80
90
0
0
0
0
200
200
0
0
0
0
0
0
25
30
20
30
25
30
45
50
45
50
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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