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M41T81 データシートの表示(PDF) - STMicroelectronics
部品番号
コンポーネント説明
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M41T81
Serial access real-time clock with alarm
STMicroelectronics
M41T81 Datasheet PDF : 29 Pages
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Description
Figure 2. 8-pin SOIC (M) connections
XI
XO
V
BAT
V
SS
1
8
2
7
3
M41T81
6
4
5
V
CC
IRQ/FT/OUT/SQW
SCL
SDA
Figure 3. Block diagram
CRYSTAL
32KHz
OSCILLATOR
SDA
SCL
I
2
C
INTERFACE
WRITE
PROTECT
V
CC
V
BAT
V
SO(3)
COMPARE
REAL TIME CLOCK
CALENDAR
RTC W/ALARM
AFE
& CALIBRATION
WATCHDOG
SQWE
SQUARE WAVE
FREQUENCY TEST
FT
OUTPUT DRIVER
OUT
INTERNAL
POWER
1. Open drain output
2. Square wave function has the highest priority on IRQ/FT/OUT/SQW output.
3. V
SO
= V
BAT
– 0.5 V (typ)
M41T81
AI04769
IRQ/FT/OUT/SQW
(1,2)
AI04616
6/29
Doc ID 7529 Rev 10
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