X28C64
A.C. CHARACTERISTICS (Over recommended operating conditions, unless otherwise specified.)
Read Cycle Limits
X28C64-15
X28C64-20
X28C64-25
Symbol
Parameter
Read Cycle Time
Min. Max. Min. Max. Min. Max. Units
tRC
tCE
tAA
tOE
150
200
250
ns
ns
ns
ns
ns
ns
ns
ns
Chip Enable Access Time
Address Access Time
150
150
70
200
200
80
250
250
100
Output Enable Access Time
CE LOW to Active Output
OE LOW to Active Output
CE HIGH to High Z Output
OE HIGH to High Z Output
Output Hold from Address Change
(4)
tLZ
0
0
0
0
0
0
(4)
tOLZ
(4)
tHZ
50
50
50
50
50
50
(4)
tOHZ
tOH
0
0
0
ns
3856 PGM T10.1
Read Cycle
t
RC
ADDR.
CE
t
CE
t
OE
OE
V
IH
WE
t
t
OLZ
OHZ
t
t
t
LZ
OH
HZ
HIGH Z
DATA I/O
DATA VALID
DATA VALID
t
AA
3853 FHD F05
Notes: (4) t min.,t , t
LZ HZ OLZ
min., and t
are periodically sampled and not 100% tested. t max. and t max. are measured, with
HZ OHZ
OHZ
C
L
= 5pF, from the point when CE or OE return HIGH (whichever occurs first) to the time when the outputs are no longer driven.
12
XICOR [ XICOR INC. ]
