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DS12887A 데이터 시트보기 (PDF) - Maxim Integrated
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DS12887A
(DS12xxx) Real Time Clock
Maxim Integrated
DS12887A Datasheet PDF : 22 Pages
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(V
CC
= +5.0V, T
A
= +25°C, unless otherwise noted.)
I
BAT1
vs. V
BAT
vs. TEMPERATURE
V
CC
= 0V
300
+85
°
C
250
+70
°
C
200
+25
°
C
0
°
C
+40
°
C
-40
°
C
150
2.5 2.8 3.0 3.3 3.5 3.8 4.0
V
BAT
(V)
Real-Time Clocks
Typical Operating Characteristics
OSCILLATOR FREQUENCY
vs. V
CC
32768.70
32768.60
32768.50
32768.40
32768.30
32768.20
32768.10
32768.00
4.5
4.8
5.0
5.3
5.5
V
CC
(V)
X1
X2
V
CC
GND
V
BAT
CS
R/W
DS
AS
MOT
RESET
AD0–AD7
RLCR
OSC
POWER
CONTROL
BUS
INTERFACE
Functional Diagram
DIVIDE
BY 8
DIVIDE
BY 64
16:1 MUX
DS12885
DIVIDE
BY 64
SQUARE-
SQW
WAVE
GENERATOR
IRQ
IRQ
GENERATOR
CLOCK/CALENDAR
UPDATE LOGIC
REGISTERS A, B, C, D
CLOCK/CALENDAR AND
ALARM REGISTERS
BUFFERED CLOCK/
CALENDAR AND ALARM
REGISTERS
USER RAM
114 BYTES
_____________________________________________________________________
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