M28W640FCT STMICROELECTRONICS [STMicroelectronics], M28W640FCT Datasheet - Page 28

• Manufacturer Part Number: M28W640FCT
• Description: 64 Mbit (4Mb x16, Boot Block) 3V Supply Flash Memory
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

M28W640FCT, M28W640FCB
Table 18. Write AC Characteristics, Chip Enable Controlled
Note: 1. Sampled only, not 100% tested.
28/55
t
QVVPL
t
VPHEH
Symbol
t
t
t
WPHEH
QVWPL
t
t
t
t
t
t
t
t
t
t
EHWH
DVEH
EHDX
AVEH
EHAX
EHEL
EHGL
ELEH
ELQV
WLEL
AVAV
2. Applicable if V
(1,2)
(1)
t
t
t
t
t
t
t
CPH
t
t
Alt
t
VPS
WC
WH
AS
DS
AH
DH
CP
CS
PP
Write Cycle Time
Address Valid to Chip Enable High
Data Valid to Chip Enable High
Chip Enable High to Address
Transition
Chip Enable High to Data Transition
Chip Enable High to Chip Enable Low
Chip Enable High to Output Enable
Low
Chip Enable High to Write Enable High
Chip Enable Low to Chip Enable High
Chip Enable Low to Output Valid
Output Valid to V
Data Valid to Write Protect Low
V
Write Enable Low to Chip Enable Low
Write Protect High to Chip Enable High
is seen as a logic input (V
PP
High to Chip Enable High
PP
Parameter
Low
PP
< 3.6V).
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
200
70
70
45
45
25
25
45
70
45
M28W640FCT, M28W640FCB
0
0
0
0
0
0
200
85
85
45
45
25
25
45
85
45
0
0
0
0
0
0
200
90
90
50
50
30
30
50
90
50
0
0
0
0
0
0
100
100
200
10
50
50
30
30
50
50
0
0
0
0
0
0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns