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X28HC64
AC Electrical Specifications
Read Cycle Limits
Over the recommended operating conditions unless otherwise specified. Parameters with MIN and/or MAX limits are
100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not
production tested.
X28HC64-70
-55°C TO +125°C
X28HC64-90
-55°C TO +125°C
X28HC64-12
-55°C TO +125°C
PARAMETER
SYMBOL
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
Read Cycle Time
Chip Enable Access Time
Address Access Time
Output Enable Access Time
CE LOW to Active Output (Note 6)
OE LOW to Active Output (Note 6)
CE HIGH to High Z Output (Note 6)
OE HIGH to High Z Output (Note 6)
Output Hold from Address Change
t RC
t CE
t AA
t OE
t LZ
t OLZ
t HZ
t OHZ
t OH
70
0
0
0
70
70
35
30
30
90
0
0
0
90
90
40
30
30
120
0
0
0
120
120
50
30
30
ns
ns
ns
ns
ns
ns
ns
ns
ns
NOTE:
6. t LZ min., t HZ , t OLZ min., and t OHZ are periodically sampled and not 100% tested. t HZ max. and t OHZ max. are measured from the point when CE
or OE return HIGH (whichever occurs first) to the time when the outputs are no longer driven.
Read Cycle
t RC
ADDRESS
t CE
CE
t OE
OE
V IH
WE
t LZ
t OLZ
t OH
t HZ
t OHZ
DATA I/O
HIGH Z
DATA VALID
DATA VALID
t AA
11
FN8109.2
August 28, 2009
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