M41T83(2008) 데이터 시트보기 (PDF) - STMicroelectronics

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M41T83
(Rev.:2008)

Serial I2C bus RTC with battery switchover

STMicroelectronics 

Description

Figure 8. M41T83 block diagram

CRYSTAL

SDA

SCL

XI

32KHz

OSCILLATOR

XO

I2C

INTERFACE

WRITE

PROTECT

VCC < VRST

VCC

REAL TIME CLOCK

CALENDAR

OSCILLATOR FAIL

CIRCUIT

ALARM1

ALARM2

OFIE

A1IE

A2IE

WATCHDOG

FT

FREQUENCY TEST

OUTPUT DRIVER

8-BIT COUNTER

SQUARE WAVE

OUT

TIE

SQWE

8 BITS OF OTP

USER SRAM (7 Bytes)

INTERNAL

POWER

VBAT

VRST/VSO(2) COMPARE

trec

TIMER

1. Open drain output

2. VRST = VSO = 2.93 V (S), 2.63 V (R), and 2.32 V (Z).

M41T82 M41T83

IRQ2(1)

IRQ1/FT/OUT(1)

SQW

RST(1)

AI11800

12/58

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