M41T82(2008) 查看數據表（PDF） - STMicroelectronics

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M41T82
(Rev.:2008)

Serial I2C bus RTC with battery switchover

STMicroelectronics 

Description

M41T82 M41T83

Table 1. Signal names

Symbol

Description

XI(1)

XO(1)

32KHz oscillator input

32KHz oscillator output

IRQ1/OUT/FT

SQW(2)

Interrupt 1/output driver/frequency test output (open drain)

32KHz programmable square wave output

RST

Power-on reset output (open drain)

FT/RST

IRQ2(3)

Frequency test output/power-on reset (open drain - M41T82 only)

Interrupt for alarm 2 (open drain)

SDA

Serial data address input/output

SCL

Serial clock input

VBAT

DU(4)

Battery supply voltage (tie VBAT to VSS if no battery is connected.)

Do not use

VCC

Supply voltage

VSS

Ground

1. For SO8 and QFN16 packages only.

2. Defaults to 32 KHz on power-up.

3. For SOX18 and QFN16 packages only.

4. DU pin must be tied to VCC.

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