CAT28C64B
A.C. CHARACTERISTICS, Write Cycle
V
CC
= 5V
±10%,
unless otherwise specified.
28C64B-12
Symbol
t
WC
t
AS
t
AH
t
CS
t
CH
t
CW(2)
t
OES
t
OEH
t
WP(2)
t
DS
t
DH
t
INIT(1)
t
BLC(1)(3)
Parameter
Write Cycle Time
Address Setup Time
Address Hold Time
CE Setup Time
CE Hold Time
CE Pulse Time
OE Setup Time
OE Hold Time
WE Pulse Width
Data Setup Time
Data Hold Time
Write Inhibit Period After Power-up
Byte Load Cycle Time
0
100
0
0
110
0
0
110
60
0
5
.05
10
100
Min.
Max.
5
0
100
0
0
110
0
0
110
60
0
5
.05
10
100
28C64B-15
Min.
Max.
5
Units
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
µs
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
BLC
max. begins with every LOW to HIGH transition of WE. If allowed to time out, a page or byte write will begin;
however a transition from HIGH to LOW within t
BLC
max. stops the timer.
Doc. No. 25006-0A 2/98 P-1
6
CATALYST [ CATALYST SEMICONDUCTOR ]
