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1. 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 nonvolatile static RAM.
2. Features
> 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
> 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 DS128887
https://www.utsource.net/ic-datasheet/M48T86PC1-833794.html
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