M41T81M6F View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

M41T81M6F

Serial access real-time clock with alarm

STMicroelectronics 

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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