HY62256A Datasheet, PDF (7/14 Pages) Hynix Semiconductor – 32Kx8bit CMOS SRAM

-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.
# Symbol
Parameter
-55
-70
-85
Unit
Min. Max. Min. Max. Min. Max.
READ CYCLE
1 tRC Read Cycle Time
55 - 70 - 85 - ns
2 tAA Address Access Time
- 55 - 70 - 85 ns
3 tACS Chip Select Access Time - 55 - 70 - 85 ns
4 tOE
Output Enable to Output
Valid
- 30 -
35 -
45 ns
5 tCLZ
Chip Select to Output in
Low Z
5-
5-
5-
ns
6 tOLZ
Output Enable to Output in
Low Z
5
-
5-
5-
ns
7 tCHZ
Chip Deselection to Output
in High Z
0
20 0
30 0
30 ns
8 tOHZ
Out Disable to Output in
High Z
0 20 0 30 0 30 ns
9 tOH
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
70/85/100ns
CL = 100pF + 1TTL Load
Output Load
55ns
CL = 50pF + 1TTL Load
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22/10/97 12:33