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5. AC Characteristics
Description
CLK clock cycle
CLK H Pulse Width
CLK L Pulse Width
CE setup time
CE hold time
CE recovery time
CLK hold time
Write DATA in setup time
Write DATA in hold time
Read DATA in delay time
Output disable delay time
rise and fall time
FOUT duty ratio
( 32.768kHz output )
CLK
C E
50%
Write Mode
CLK
50
%
DATA
50
%
C E
50
%
V
DD
Symbol
MIN.
t
1200
CLK
t
600
WH
t
600
WL
t
300
CS
t
400
CH
t
600
CR
t
100
CKH
t
50
DS
t
50
DH
t
0
RD
t
-
RZ
t
-
RF
Duty
35
t
t
WL
CS
50%
t
t
DS
DH
t
CS
=3.0V±10%
TYP.
MAX.
MIN.
600
-
-
300
-
-
300
-
-
150
-
-
200
-
-
300
-
-
50
-
-
50
-
-
50
-
400
0
-
200
-
-
40
-
-
65
40
t
WH
ReadMode
t
RF
CLK
50
%
DATA
50
C E
Page-4
( CL=50pF,Ta=-40 to 85
V
=5.0V±10%
DD
TYP.
MAX.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
200
-
100
-
20
-
60
t
t
CH
CKH
t
CR
t
RF
90
%
10
%
t
RD
%
t
RZ
50
%
°C
)
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
90
%
Hi-Z
10
%
Aug.1998
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