AS7C256 ETC, AS7C256 Datasheet - Page 4

• Manufacturer Part Number: AS7C256
• Description: High Performance 32Kx8 CMOS SRAM
• Manufacturer: ETC

AS7C256
AS7C256L
Parameter
Read Cycle Time
Address Access Time
Chip Enable (CE) Access Time
Output Enable (OE) Access Time
Output Hold from Address Change
CE LOW to Output in Low Z
CE HIGH to Output in High Z
OE LOW to Output in Low Z
OE HIGH to Output in High Z
Power Up Time
Power Down Time
Address
READ CYCLE
TIMING WAVEFORM OF READ CYCLE 1
TIMING WAVEFORM OF READ CYCLE 2
Current
Supply
D
D
CE
OE
out
out
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
3, 9
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
t
t
PU
AAAA
AAAA
AAAA
AAAA
AAAA
CLZ
A
A A
A A
t
ACE
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
RC
AA
ACE
OE
OH
CLZ
CHZ
OLZ
OHZ
PU
PD
OE
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
t
50%
AA
t
OLZ
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
t
RC
t
1
Min Max Min Max Min Max Min Max Min Max Min Max
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
RC
10
3, 6, 7, 9
3, 6, 8, 9
–
–
–
2
3
–
0
–
0
–
-10
AAAA
AAAA
AAAA
AAAA
10
10
10
–
3
–
–
3
–
3
–
AA AA
AA AA
12
–
–
–
3
3
–
0
–
0
–
Data Valid
-12
4
AAAA
AAAA
AAAA
AAAA
AAAA
12
12
12
–
3
–
–
3
–
3
–
Data Valid
AAAA
AAAA
AAAA
AAAA
AAAA
15
–
–
–
3
3
–
0
–
0
–
AAAA
AAAA
AAAA
AAAA
AAAA
-15
(V
15
15
15
t
–
4
–
–
4
–
4
–
AAAA
AAAA
AAAA
AAAA
AAAA
OH
CC
AAAA
AAAA
AAAA
AAAA
AAAA
t
= 5V 10%, GND = 0V, T
20
PD
–
–
–
3
3
–
0
–
0
–
50%
-20
t
t
AAAA
AAAA
AAAA
AAAA
AAAA
CHZ
OHZ
20
20
20
–
5
–
–
5
–
5
–
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
25
–
–
–
3
3
–
0
–
0
–
-25
AAAA
AAAA
AAAA
AAAA
AAAA
25
25
25
–
6
–
–
6
–
6
–
AAAA
AAAA
AAAA
AAAA
AAAA
35
–
–
–
3
3
–
0
–
0
–
AAAA
AAAA
AAAA
AAAA
AAAA
(Address Controlled)
-35
AAAA
AAAA
AAAA
AAAA
AAAA
a
35
35
35
(CE Controlled)
–
8
–
–
8
–
8
–
= 0°C to +70°C)
AAAA
AAAA
AAAA
AAAA
AAAA
Unit Notes
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
AAAA
AAAA
AAAA
AAAA
AAAA
AS7C256-04
AAAA
AAAA
AAAA
AAAA
AAAA
4, 5
4, 5
4, 5
4, 5
4, 5
4, 5
I
I
CC
SB
3
3
5
AA
AA AA
AA AA