[ARTSCHIP]

SUMMARY DESCRIPTION
The M48T86 is an industry standard Real Time Clock (RTC). The M48T86 is composed of a lithium energy source, quartz crystal, write protection circuitry, and a 128-byte RAM array. This provides the user with a complete subsystem packaged in either a 24-pin DIP CAPHAT™ or 28-pin SNAPHAT® SOIC. Functions available to the user include a non-volatile time-of-day clock, alarm interrupts, a one-hundred-year clock with programmable interrupts, square wave output, and 128 bytes of non-volatile static RAM.

FEATURES SUMMARY
■ DROP-IN REPLACEMENT FOR PC COMPUTER CLOCK/CALENDAR
■ COUNTS SECONDS, MINUTES, HOURS, DAYS, DAY OF THE WEEK, DATE, MONTH, and YEAR WITH LEAP YEAR COMPENSATION
■ INTERFACED WITH SOFTWARE AS 128 RAM LOCATIONS:
   – 14 Bytes of Clock and Control Registers
   – 114 Bytes of General Purpose RAM
■ SELECTABLE BUS TIMING (Intel/Motorola)
■ THREE INTERRUPTS ARE SEPARATELY SOFTWARE-MASKABLE and TESTABLE
   – Time-of-Day Alarm (Once/Second to Once/Day)
   – Periodic Rates from 122µs to 500ms
   – End-of-Clock Update Cycle
■ PROGRAMMABLE SQUARE WAVE OUTPUT
■ 10 YEARS OF DATA RETENTION AND CLOCK OPERATION IN THE ABSENCE OF POWER
■ SELF-CONTAINED BATTERY AND CRYSTAL IN THE CAPHAT DIP PACKAGE
■ PACKAGING INCLUDES A 28-LEAD SOIC and SNAPHAT® TOP (to be ordered separately)
■ SOIC PACKAGE PROVIDES DIRECT CONNECTION FOR A SNAPHAT TOP CONTAINS THE BATTERY AND CRYSTAL
■ PIN AND FUNCTION COMPATIBLE WITH bq3285/7A and DS12887