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MSM6242B 데이터 시트보기 (PDF) - Oki Electric Industry
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MSM6242B
DIRECT BUS CONNECTED CMOS REAL TIME CLOCK/CALENDAR
Oki Electric Industry
MSM6242B Datasheet PDF : 18 Pages
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¡ Semiconductor
MSM6242B
CS
1
A
0
~ A
3
CS
0
ALE
WR
D
0
~ D
3
(INPUT)
V
IH2
–
V
IH1
–
V
IL1
–
V
IH1
–
V
IL1
–
V
IH1
–
V
IL1
–
V
IH1
–
V
IL1
–
t
C1S
,,,
,,,,
t
AS
,,,
,,
t
AH
,,,,
t
C1H
,,,,,,,
t
,
A
,
W
,,,,,,,
t
ALW
,,,
,,
,,,
,,,,
t
WW
,,,
t
DS
t
WAL
,,
t
,
D
,
H
,,,
t
R
,,
C
,
V
,,,,,
,,,,,,,
Figure 5. Write Cycle — (With Use of ALE)
V
IH1
= 2.2V
V
IL1
= 0.8V
V
IH2
= 4/5V
DD
V
IL2
= 1/5V
DD
(3) READ mode (ALE = V
DD
)
Parameter
CS
1
Set up Time
CS
1
Hold Time
Address Stable before
READ
Address Stable after
READ
RD
to Data
Data Hold
RD
/
WR
Recovery Time
Symbol
t
C1S
t
C1H
t
AR
t
RA
t
RD
t
DR
t
RCV
Condition
—
—
—
—
C
L
= 150pF
—
—
(V
DD
= 5V ± 10%, Ta = -40 to +85°C)
Min.
Max.
Unit
1000
—
1000
—
20
—
ns
0
—
—
120
0
—
60
—
CS
1
A
0
~ A
3
CS
0
RD
D
0
~ D
3
(OUTPUT)
V
IH2
–
V
IH1
–
V
IL1
–
t
C1S
,,,
V
IH1
–
V
IL1
–
V
OH
–
V
OL
–
,,,,,
t
AR
,,,,
t
RA
t
C1H
,,,,
,,,
,,,
t
RD
t
DR
,
t
,
R
,
C
,
V
,,,,,,,,
,,,,,,,,,,,,,,,,,,
"Z"
Figure 6. Read Cycle — (ALE = V
DD
)
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
29
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