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Part Name
Description
DS1644L-120 View Datasheet(PDF) - Dallas Semiconductor -> Maxim Integrated
Part Name
Description
Manufacturer
DS1644L-120
Nonvolatile Timekeeping RAM
Dallas Semiconductor -> Maxim Integrated
DS1644L-120 Datasheet PDF : 11 Pages
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DS1644LPM
DS1644L WRITE CYCLE TIMING
WRITE
t
WC
A0–A14
CE
t
AS
t
AH2
t
WR
t
CEW
WRITE
t
WC
READ
t
RC
t
AA
t
AH1
OE
WE
t
CEZ
DQ0– VALID
DQ7 OUT
t
WR
t
WEW
t
DH2
t
DS
VALID IN
t
DH1
t
DS
VALID IN
t
OEA
t
WEZ
VALID OUT
POWER–DOWN/POWER–UP TIMING
V
CC
V
PF
(MAX)
V
PF
V
PF
(MIN)
t
F
PFO
t
FB
V
SO
V
PF
(MIN)
V
PF
(MAX)
V
PF
t
R
V
SO
t
RB
PFO
t
PD
CE
I
BATT
DATA RETENTION
t
DR
t
REC
041697 9/11
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