AS7C256
AS7C256L
READ CYCLE
3, 9
-10
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
-12
(V
CC
= 5V±10%, GND = 0V, T
a
= 0°C to +70°C)
-15
-20
-25
-35
Notes
Symbol Min Max Min Max Min Max Min Max Min Max Min Max Unit
t
RC
t
AA
t
ACE
t
OE
t
OH
t
CLZ
t
CHZ
t
OLZ
t
OHZ
t
PU
t
PD
10
–
–
–
2
3
–
0
–
0
–
–
10
10
3
–
–
3
–
3
–
10
12
–
–
–
3
3
–
0
–
0
–
–
12
12
3
–
–
3
–
3
–
12
15
–
–
–
3
3
–
0
–
0
–
–
15
15
4
–
–
4
–
4
–
15
20
–
–
–
3
3
–
0
–
0
–
–
20
20
5
–
–
5
–
5
–
20
25
–
–
–
3
3
–
0
–
0
–
–
25
25
6
–
–
6
–
6
–
25
35
–
–
–
3
3
–
0
–
0
–
–
35
35
8
–
–
8
–
8
–
35
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3
3
5
4, 5
4, 5
4, 5
4, 5
4, 5
4, 5
TIMING WAVEFORM OF READ CYCLE 1
3, 6, 7, 9
t
RC
Address
t
AA
D
out
AAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAA
(Address Controlled)
t
OH
Data Valid
TIMING WAVEFORM OF READ CYCLE 2
3, 6, 8, 9
t
RC1
CE
AAAAAAAAAAAAAAAAAAAAAAAAA
OE
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
(CE Controlled)
t
OE
t
OLZ
AAAAAAAAAAAA
AAAAAAAAAAAA
AAAAAAAAAAAA
AAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
t
ACE
D
out
t
CLZ
Supply
Current
t
PU
t
OHZ
t
CHZ
Data Valid
t
PD
I
CC
I
SB
AS7C256-04
50%
50%
4
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
