AS7C256
AS7C256L
读周期
3, 9
-10
参数
读周期时间
地址访问时间
芯片使能( CE )访问时间
输出使能( OE )访问时间
从地址变更输出保持
CE低到低Z输出
CE高到输出高阻
OE低到低Z输出
OE高到高Z输出
电时间
关机时间
-12
(V
CC
= 5V ±10 % , GND = 0V ,T
a
= 0 ° C至+ 70 ° C)
-15
-20
-25
-35
笔记
符号最小值最大值最小值最大值最小值最大值最小值最大值最小值最大值最小值最大值单位
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
读周期1的时序波形
3, 6, 7, 9
t
RC
地址
t
AA
D
OUT
AAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAA
(地址控制)
t
OH
数据有效
读周期2时序波形
3, 6, 8, 9
t
RC1
CE
AAAAAAAAAAAAAAAAAAAAAAAAA
OE
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
( CE控制)
t
OE
t
OLZ
AAAAAAAAAAAA
AAAAAAAAAAAA
AAAAAAAAAAAA
AAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
t
ACE
D
OUT
t
CLZ
供应
当前
t
PU
t
OHZ
t
CHZ
数据有效
t
PD
I
CC
I
SB
AS7C256-04
50%
50%
4