M41T80数据手册集成电路（IC）的实时时钟规格书PDF

描述 Description

The M41T80 is a low power serial RTC with a built-in 32.768 kHz oscillator (external crystal controlled). Eight registers are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. An additional 12 registers provide status/control of alarm, 32 KHz output, and square wave 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.

Functions available to the user include a time-of-day clock/calendar, alarm interrupts, 32 KHz output, and programmable square wave output. The eight clock address locations contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28, 29 (leap year - valid until year 2100), 30 and 31 day months are made automatically.

The M41T80 is supplied in an 8-pin SOIC.

特性 Features

• Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century
• 32 KHz crystal oscillator integrating load capacitance (12.5 pF) providing exceptional oscillator stability and high crystal series resistance operation
• Serial interface supports I2C bus (400 kHz)
• 2.0 to 5.5 V clock operating voltage
• 32 KHz square wave on power-up to drive a microcontroller in low-power mode
• Programmable (1 Hz to 32 KHz) square wave
• Programmable alarm and interrupt function
• Low operating current of 200 μA
• Operating temperature of –40 to 85 °C
• ECOPACK®package available

简介

M41T80属于集成电路（IC）的实时时钟。由制造生产的M41T80实时时钟实时时钟 (RTC) 为几乎所有需要保持精确时间的电子设备提供时间和/或日期信息。时钟类型有二进制计数器、时钟/日历/监控器、历时计时器、幻时钟芯片、便携式系统控制器、温度记录器、时间事件记录器和计时器时钟外设。其包含 2 B 至 2 MB 不等的存储器，接口选项有 I2C、并行、串行、SPI、1 线式、2 线式、3 线式和 4 线式。