Rainbow Electronics W24257 User Manual
Page 4
W24257
- 4 -
AC Characteristics, continued
(V
DD
= 5V
±
10%, V
SS
= 0V, T
A
= 0 to 70
°
C)
Read Cycle
PARAMETER
SYM.
W24257-70
W24257-10
UNIT
MIN.
MAX.
MIN.
MAX.
Read Cycle Time
T
RC
70
-
100
-
nS
Address Access Time
T
AA
-
70
-
100
nS
Chip Select Access Time
T
ACS
-
70
-
100
nS
Output Enable to Output Valid
T
AOE
-
35
-
50
nS
Chip Selection to Output in Low Z
T
CLZ
*
10
-
10
-
nS
Output Enable to Output in Low Z
T
OLZ
*
5
-
5
-
nS
Chip Deselection to Output in High Z
T
CHZ
*
-
30
-
35
nS
Output Disable to Output in High Z
T
OHZ
*
-
30
-
35
nS
Output Hold from Address Change
T
OH
10
-
10
-
nS
∗
These parameters are sampled but not 100% tested
Write Cycle
PARAMETER
SYM.
W24257-70
W24257-10
UNIT
MIN.
MAX.
MIN.
MAX.
Write Cycle Time
T
WC
70
-
100
-
nS
Chip Selection to End of Write
T
CW
60
-
80
-
nS
Address Valid to End of Write
T
AW
60
-
80
-
nS
Address Setup Time
T
AS
0
-
0
-
nS
Write Pulse Width
T
WP
45
-
60
-
nS
Write Recovery Time
CS, WE
T
WR
0
-
0
-
nS
Data Valid to End of Write
T
DW
30
-
40
-
nS
Data Hold from End of Write
T
DH
0
-
0
-
nS
Write to Output in High Z
T
WHZ
*
-
30
-
30
nS
Output Disable to Output in High Z
T
OHZ
*
-
30
-
30
nS
Output Active from End of Write
T
OW
0
-
0
-
nS
∗
These parameters are sampled but not 100% tested