AC CHARACTERISTICS
Vcc = 5V(±)10%, TA = 0°C to 70°C (Normal)/ -40°C to 85°C (E.T.) unless otherwise
specified.
#Symbol Parameter -55 -70 -85 Unit
Min. Max. Min. Max. Min. Max.
READ CYCLE
1tRC Read Cycle Time 55 -70 -85 -ns
2tAA Address Access Time -55 -70 -85 ns
3tACS Chip Select Access Time -55 -70 -85 ns
4tOE Output Enable to Output
Valid -30 -35 -45 ns
5tCLZ Chip Select to Output in
Low Z 5-5-5-ns
6tOLZ Output Enable to Output in
Low Z 5-5-5-ns
7tCHZ Chip Deselection to Output
in High Z 0 20 0 30 0 30 ns
8tOHZ Out Disable to Output in
High Z 0 20 0 30 0 30 ns
9tOH Output Hold from Address
Change 5-5-5-ns
WRITE CYCLE
10 tWC Write Cycle Time 55 -70 -85 -ns
11 tCW Chip Selection to End of
Write 50 -65 -75 -ns
12 tAW Address Valid to End of
Write 50 -65 -75 -ns
13 tAS Address Set-up Time 0-0-0-ns
14 tWP Write Pulse Width 40 -50 -55 -ns
15 tWR Write Recovery Time 0-0-0-ns
16 tWHZ Write to Output in High Z 0 20 0 30 0 30 ns
17 tDW Data to Write Time Overlap 25 -35 -40 -ns
18 tDH Data Hold from Write Time 0-0-0-ns
19 tOW Output Active from End of
Write 5-5-5-ns
AC TEST CONDITIONS
TA = 0°C to 70°C (Normal) / -40°C to 85°C (E.T.) unless otherwise specified.
PARAMETER VALUE
Input Pulse Level 0.8V to 2.4V
Input Rise and Fall Time 5ns
Input and Output Timing Reference Levels 1.5V
Output Load 70/85/100ns CL = 100pF + 1TTL Load
55ns CL = 50pF + 1TTL Load
3 of 4 22/10/97 12:33
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