MSM6242B
(4) READ mode (With use of ALE)
¡ Semiconductor
(V
DD
= 5V ± 10%, Ta = -40 to +85°C)
Parameter
CS
1
Set up Time
Address Set up Time
Address Hold Time
ALE Pulse Width
ALE before READ
ALE after READ
RD to Data
DATA Hold
CS
1
Hold Time
RD
/
WR
Recovery Time
Symbol
t
C1S
t
AS
t
AH
t
AW
t
ALR
t
RAL
t
RD
t
DR
t
C1H
t
RCV
Condition
—
—
—
—
—
—
C
L
= 150pF
—
—
—
Min.
1000
25
25
40
10
10
—
0
1000
60
Max.
—
—
—
—
—
—
120
—
—
—
ns
Unit
CS
1
A
0
~ A
3
CS
0
ALE
RD
D
0
~ D
3
(OUTPUT)
V
IH2
–
V
IH1
–
V
IL1
–
V
IH1
–
,
V
IL1
,
–
V
IH1
–
V
IL1
–
V
OH
–
V
OL
–
t
C1S
,,
t
AS
,,
,,
,,
,,
,
t
AH
,,
,,
t
C1H
V
IH1
= 2.2V
V
IL1
= 0.8V
V
IH2
= 4/5V
DD
V
IL2
= 1/5V
DD
V
OH
= 2.2V
V
OL
= 0.8V
,,
,
t
AW
,,
,
,,
,,
t
ALR
,,
,
,,
,,
,,
,
,,
,
t
RAL
t
RCV
,,
,,
,,
t
DR
,,,,
,,
,
t
RD
,,
,,
,,
,,
,,
"Z"
Figure 7. Read Cycle — (With Use of ALE)
30
OKI [ OKI ELECTRONIC COMPONETS ]
