M41T56M6F 512 bit (64 bit x8) Serial Access TIMEKEEPER SRAM complex integrated circuits

M41T56M6F 512 bit (64 bit x8) Serial Access TIMEKEEPER SRAM complex integrated circuits

FEATURES SUMMARY

■ 5V ±10% SUPPLY VOLTAGE

■ COUNTERS FOR SECONDS, MINUTES, HOURS, DAY, DATE, MONTH, YEARS, AND CENTURY

■ YEAR 2000 COMPLIANT

■ SOFTWARE CLOCK CALIBRATION

■ AUTOMATIC POWER-FAIL DETECT AND SWITCH CIRCUITRY

■ I 2C BUS COMPATIBLE

■ 56 BYTES OF GENERAL PURPOSE RAM

■ ULTRA-LOW BATTERY SUPPLY CURRENT OF 450nA

■ LOW OPERATING CURRENT OF 300µA

■ OPERATING TEMPERATURE OF –40 to 85°C

■ AUTOMATIC LEAP YEAR COMPENSATION

■ SPECIAL SOFTWARE PROGRAMMABLE OUTPUT

■ PACKAGING OPTIONS INCLUDE: – 28-lead SOIC and SNAPHAT® TOP (to be ordered separately) – SO8

SUMMARY DESCRIPTION

The M41T56 TIMEKEEPER® is a low power, 512- bit static CMOS RAM organized as 64 words by 8 bits. A built-in 32,768Hz oscillator (external crystal controlled) and the first 8 bytes of the RAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via a twoline, bi-directional bus. The built-in address register is incremented automatically after each WRITE or READ data byte.

STOCK LIST