CAT28C64B
A.C. CHARACTERISTICS, Write Cycle
VCC = 5V 10%, unless otherwise specified.
28C64B-90
28C64B-12
28C64B-15
Symbol
tWC
Parameter
Min. Max. Min. Max.
Min. Max. Units
Write Cycle Time
Address Setup Time
Address Hold Time
CE Setup Time
5
5
5
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
µs
tAS
0
100
0
0
100
0
0
100
0
tAH
tCS
tCH
CE Hold Time
0
0
0
(2)
tCW
CE Pulse Time
110
0
110
0
110
0
tOES
tOEH
OE Setup Time
OE Hold Time
0
0
0
(2)
tWP
WE Pulse Width
Data Setup Time
Data Hold Time
110
60
0
110
60
0
110
60
0
tDS
tDH
(1)
tINIT
Write Inhibit Period After Power-up
Byte Load Cycle Time
5
10
5
10
5
10
(1)(3)
tBLC
.05
100
.05
100
.05
100
Note:
(1) This parameter is tested initially and after a design or process change that affects the parameter.
(2) A write pulse of less than 20ns duration will not initiate a write cycle.
(3) A timer of duration t
max. begins with every LOW to HIGH transition of WE. If allowed to time out, a page or byte write will begin;
BLC
however a transition from HIGH to LOW within t
max. stops the timer.
BLC
Doc. No. 1011, Rev. F
6
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