M41T63Q6F

串行访问实时时钟与闹钟 Serial Access Real-Time Clock with Alarms

Description

The M41T6x serial access TIMEKEEPER® is a low power serial RTC with a built-in 32.768 kHz oscillator. Eight registers are used for the clock/calendar function and are configured in binary coded decimal BCD format. An additional 8 registers provide status/control of alarm, 32 KHz output, calibration, and watchdog functions. Addresses and data are transferred serially via a two line, bi-directional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte.

Features

■ Serial RTC with alarm functions

– 400 kHz I2C serial interface

– Memory mapped registers for seconds, minutes, hours, day, date, month, year, and century

– Tenths/hundredths of seconds register

■ 350 nA timekeeping current at 3 V

■ Timekeeping down to 1.0 V

■ 1.3 V to 4.4 V I2C bus operating voltage

– 4.4 V max VCCsuitable for lithium-ion battery operation

■ Low operating current of 35 µA at 400 kHz

■ 32 KHz square wave output is on at power-up.

    Suitable for driving a microcontroller in lowpower mode. Can be disabled. M41T62/63/64

■ Programmable 1 Hz to 32 KHz square wave output M41T62/63/64

■ Programmable alarm with interrupt function M41T62/65

■ 32 KHz crystal oscillator integrates crystal load capacitors, works with high series resistance crystals

■ Oscillator stop detection monitors clock operation

■ Accurate programmable watchdog

– 62.5 ms to 31 min timeout

■ Software clock calibration. Can adjus timekeeping to within ±2 parts per million ±5 seconds per month

■ Automatic leap year compensation

■ –40 to +85 °C operation

■ Very small 3 mm x 3 mm, Lead-free 16-lead QFN