m41t81s STMicroelectronics, m41t81s Datasheet - Page 8

• Manufacturer Part Number: m41t81s
• Description: Serial Access Real-time Clock With Alarms
• Manufacturer: STMicroelectronics

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Figure 4.
1. Open drain output
2. Square Wave function has the highest priority on IRQ/FT/OUT/SQW output.
CRYSTAL
Block diagram
SDA
V
SCL
CC
V
BAT
V
V
PFD
SO
OSCILLATOR
INTERFACE
COMPARE
32KHz
I
2
C
PROTECT
WRITE
FREQUENCY TEST
REAL TIME CLOCK
OSCILLATOR FAIL
OUTPUT DRIVER
& CALIBRATION
SQUARE WAVE
RTC W/ALARM
WATCHDOG
CALENDAR
CIRCUIT
INTERNAL
POWER
OFIE
AFE
SQWE
FT
OUT
(2)
IRQ/FT/OUT/SQW
AI09163
(1)