
DS1248Y
032697 10/12
WRITE CYCLE TO PHANTOM CLOCK
DATA IN STABLE
t
WC
t
WP
t
WR
t
CW
t
WR
t
DS
t
DH
t
DH
WE
CE
D
OE
= V
IH
POWER–DOWN/POWER–UP CONDITION
DATA RETENTION TIME
t
DR
LEAKAGE CURRENT I
L
SUPPLIED FROM LITHIUM
CELL
t
R
t
REC
t
PD
t
F
V
CC
4.50V
3.2V
CE
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