28C256 查看數據表（PDF） - Xicor -> Intersil
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28C256 Datasheet PDF : 24 Pages
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X28C256
A.C. CHARACTERISTICS (over recommended operating conditions, unless otherwise specified)
Read Cycle Limits
Symbol
Parameter
X28C256-20 X28C256-25 X28C256
Min. Max. Min. Max. Min. Max. Units
tRC
tCE
tAA
tOE
tLZ(5)
tOLZ(5)
tHZ(5)
tOHZ(5)
tOH
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
Read Cycle
200
250
300
ns
200
250
300 ns
200
250
300 ns
80
100
100 ns
0
0
0
ns
0
0
0
ns
50
50
50 ns
50
50
50 ns
0
0
0
ns
3855 PGM T10.1
ADDRESS
CE
OE
VIH
WE
DATA I/O
HIGH Z
tRC
tCE
tOE
tOLZ
tLZ
tOH
DATA VALID
tAA
tHZ
DATA VALID
tOHZ
3855 FHD F05
Note: (5) tLZ min., tHZ, tOLZ min., and tOHZ are peridocally sampled and not 100% tested. tHZ and tOHZ are measured, with CL = 5pF, from
the point when CE or OE return HIGH (whichever occurs first) to the time when the outputs are no longer driven.
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