W24257A 데이터 시트보기 (PDF) - Winbond
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W24257A Datasheet PDF : 11 Pages
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W24257A
AC CHARACTERISTICS
(VDD = 5V ±10%, VSS = 0V, TA = 0 to 70° C)
Read Cycle
PARAMETER
Read Cycle Time
Address Access Time
Chip Select Access Time
Output Enable to Output Valid
Chip Selection to Output in Low Z
Output Enable to Output in Low Z
Chip Deselection to Output in High Z
Output Disable to Output in High Z
Output Hold from Address Change
SYM.
TRC
TAA
TACS
TAOE
TCLZ∗
TOLZ∗
TCHZ∗
TOHZ∗
TOH
W24257A-10
MIN. MAX.
10
-
-
10
-
10
-
5
3
-
W24257A-12
MIN. MAX.
12
-
-
12
-
12
-
6
3
-
W24257A-15
MIN. MAX.
15
-
-
15
-
15
-
7
3
-
W24257A-20
MIN. MAX.
20
-
-
20
-
20
-
10
3
-
UNIT
nS
nS
nS
nS
nS
0
-
0
-
0
-
0
-
nS
-
5
-
6
-
7
-
10
nS
-
5
-
6
-
7
-
10
nS
3
-
3
-
3
-
3
-
nS
∗ These parameters are sampled but not 100% tested.
Write Cycle
PARAMETER
SYM.
W24257A-10
MIN. MAX.
Write Cycle Time
TWC
10
-
Chip Selection to End of Write
TCW
9
-
Address Valid to End of Write
TAW
9
-
Address Setup Time
TAS
0
-
Write Pulse Width
TWP
9
-
Write Recovery Time
CS , WE TWR
0
-
Data Valid to End of Write
TDW
6
-
Data Hold from End of Write
TDH
0
-
Write to Output in High Z
TWHZ∗
-
6
Output Disable to Output in High Z
TOHZ∗
-
6
Output Active from End of Write
TOW
0
-
∗ These parameters are sampled but not 100% tested.
W24257A-12
MIN. MAX.
12
-
10
-
10
-
0
-
10
-
0
-
7
-
0
-
-
7
-
7
0
-
W24257A-15
MIN. MAX.
15
-
13
-
13
-
0
-
10
-
0
-
9
-
0
-
-
8
-
8
0
-
W24257A-20
MIN. MAX.
20
-
17
-
17
-
0
-
12
-
0
-
10
-
0
-
-
10
-
10
0
-
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
Publication Release Date: May 1997
-5-
Revision A14
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