M41T81 查看數據表（PDF） - STMicroelectronics
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M41T81 Datasheet PDF : 29 Pages
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Description
Figure 2. 8-pin SOIC (M) connections
XI
XO
VBAT
VSS
1
8
2
7
3 M41T81 6
4
5
VCC
IRQ/FT/OUT/SQW
SCL
SDA
Figure 3. Block diagram
CRYSTAL
32KHz
OSCILLATOR
SDA
SCL
I2C
INTERFACE
WRITE
PROTECT
VCC
VBAT
VSO(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. VSO = VBAT – 0.5 V (typ)
M41T81
AI04769
IRQ/FT/OUT/SQW(1,2)
AI04616
6/29
Doc ID 7529 Rev 10
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