ST M41T82ZM6F

时钟/日历警报器，闰年，SRAM，监视计时器7B

Overview

The M41T8x are low-power serial I2C real-time clocks (RTCs) with a built-in 32.768 kHz oscillator (external crystal-controlled for the QFN16 and SO8 packages, embedded crystal for the SOX18 package). Eight bytes of the register map (see Table 2 on page 23) are used for the clock/calendar function and are configured in binary-coded decimal (BCD) format. An additional 17 bytes of the register map provide status/control of the two alarms, watchdog, 8-bit counter, and square wave functions. An additional seven bytes are made available as user SRAM.

Addresses and data are transferred serially via a two-line, bidirectional I2C interface. The built-in address register is incremented automatically after each WRITE or READ data byte. The M41T8x has a built-in power sense circuit which detects power failures and automatically switches to the battery supply when a power failure occurs. The energy needed to sustain the clock operations can be supplied by a small lithium button battery when a power failure occurs. Functions available to the user include a non-volatile, time-of-day clock/calendar, two alarm interrupts, watchdog timer, programmable 8-bit counter, and square wave outputs. 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), 30, and 31 day months are made automatically. The M41T83 is supplied in either a QFN16 or an SOX18, 300 mil SOIC which includes an embedded 32 KHz crystal. The SOX18 package requires only a user-supplied battery to provide non-volatile operation. The M41T82ZM6F is available only in an SO8 package.

Features

Tape & Reel (TR) Package
8-SOIC (0.154, 3.90mm Width) package
8 terminations
8 pin count
3/5V power supplies
8 Bits

Surface Mount Mounting Type

Applications

There are a lot of STMicroelectronics
M41T82ZM6F Real Time Clocks applications.

• Electronic metering
• Battery powered products
• Automotive
• Industrial
• Digital still camera
• Digital video camera
• Printers
• Copy machines
• Mobile equipment
• Battery powered devices