X28C256D Xicor, X28C256D Datasheet - Page 12

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X28C256D

Manufacturer Part Number
X28C256D
Description
5 Volt/ Byte Alterable E2PROM
Manufacturer
Xicor
Datasheet

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X28C256
A.C. CHARACTERISTICS (over recommended operating conditions, unless otherwise specified)
Read Cycle Limits
Read Cycle
Note: (5) t
ADDRESS
Symbol
t
t
t
t
t
t
t
t
t
DATA I/O
RC
CE
AA
OE
LZ
OLZ (5)
HZ (5)
OHZ
OH
(5)
(5)
WE
OE
CE
LZ
the point when CE or OE return HIGH (whichever occurs first) to the time when the outputs are no longer driven.
min., t
HIGH Z
V IH
Read Cycle Time
Chip Enable Access Time
Address Access Time
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
HZ
, t
OLZ
min., and t
Parameter
OHZ
t LZ
are peridocally sampled and not 100% tested. t
t OLZ
t CE
t OE
t RC
DATA VALID
12
X28C256-20 X28C256-25
Min.
200
0
0
0
Max.
200
200
80
50
50
t OH
t AA
HZ
and t
Min.
250
0
0
0
OHZ
Max.
are measured, with C
250
250
100
50
50
DATA VALID
Min.
300
X28C256
0
0
0
Max.
t HZ
300
300
100
50
50
L
= 5pF, from
3855 FHD F05
3855 PGM T10.1
t OHZ
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns

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