-sram/62256ala1
http://www.hea.com/hean2/sram/62256ala1.htm
AC CHARACTERISTICS
Vcc = 5V(±)10%, TA = 0°C to 70°C (Normal)/ -40°C to 85°C (E.T.) unless otherwise
specified.
-55
-70
-85
# Symbol
Parameter
Unit
Min. Max. Min. Max. Min. Max.
READ CYCLE
1 tRC
2 tAA
3 tACS
Read Cycle Time
55
-
-
70
-
-
85
-
-
ns
ns
ns
Address Access Time
55
55
70
70
85
85
Chip Select Access Time
-
-
-
Output Enable to Output
Valid
4 tOE
-
30
-
-
35
-
-
45
-
ns
ns
ns
ns
ns
ns
Chip Select to Output in
Low Z
5 tCLZ
6 tOLZ
7 tCHZ
8 tOHZ
9 tOH
5
5
0
0
5
5
5
0
0
5
5
5
0
0
5
Output Enable to Output in
Low Z
-
-
-
Chip Deselection to Output
in High Z
20
20
-
30
30
-
30
30
-
Out Disable to Output in
High Z
Output Hold from Address
Change
WRITE CYCLE
10 tWC
Write Cycle Time
55
50
-
-
70
65
-
-
85
75
-
-
ns
ns
Chip Selection to End of
Write
11 tCW
Address Valid to End of
Write
12 tAW
50
-
65
-
75
-
ns
13 tAS
14 tWP
15 tWR
Address Set-up Time
Write Pulse Width
0
-
0
-
0
-
ns
ns
ns
ns
ns
ns
40
0
-
50
0
-
55
0
-
Write Recovery Time
-
-
-
16 tWHZ Write to Output in High Z
0
20
-
0
30
-
0
30
-
17 tDW
18 tDH
Data to Write Time Overlap 25
Data Hold from Write Time 0
35
0
40
0
-
-
-
Output Active from End of
Write
19 tOW
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
Input Rise and Fall Time
0.8V to 2.4V
5ns
Input and Output Timing Reference Levels 1.5V
70/85/100ns
55ns
CL = 100pF + 1TTL Load
CL = 50pF + 1TTL Load
Output Load
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22/10/97 12:33