DS1643-120 DALLAS [Dallas Semiconductor], DS1643-120 Datasheet - Page 9

• Manufacturer Part Number: DS1643-120
• Description: Nonvolatile Timekeeping RAM
• Manufacturer: DALLAS [Dallas Semiconductor]

DS1643 WRITE CYCLE TIMING
POWER–DOWN/POWER–UP TIMING
A0–A12
CE
OE
WE
DQ0–
DQ7
t
CEZ
V
CE
I
BATT
CC
VALID
OUT
V
PF
(MAX)
t
F
t
AS
t
PD
t
DS
WRITE
t
WC
V
t
t
WEW
PF
t
FB
CEW
t
AH2
(MIN)
VALID IN
V
SO
t
WR
t
WR
t
DH2
DATA RETENTION
WRITE
t
DR
t
WC
t
DS
VALID IN
t
DH1
V
SO
t
AH1
t
AA
V
t
RB
READ
PF
t
RC
t
REC
VALID OUT
t
OEA
t
t
WEZ
R
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DS1643