Product Summary

The M48T86PC1 is an industry standard real time clock (RTC).The M48T86PC1 is composed of a lithium energy source, quartz crystal, write-protection circuitry, and a 128 byte RAM array. The M48T86PC1 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.

Parametrics

M48T86PC1 absolute maximum ratings: (1)TA, Ambient Operating Temperature: 0 to 70 ℃; (2)TSTG, Storage Temperature: –40 to 85 ℃; (3)TSLD, Lead Solder Temperature for 10 seconds: 260 ℃; (4)VIO, Input or Output Voltages: –0.3 to 7.0 V; (5)VCC, Supply Voltage: –0.3 to 7.0 V; (6)P, Power Dissipation: 1 W.

Features

M48T86PC1 features: (1)drop-in replacement for pc computer clock/calendar; (2)counts seconds, minutes, hours, days, day of the week, date, month and year with leap year compensation; (3)interfaced with software as 128 ram locations, 14 bytes of clock and control registers, 114 bytes of general purpose ram; (4)selectable bus timing (intel/motorola); (5)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; (6)programmable square wave output; (7)self-contained battery and crystal in the caphat dip package; (8)packaging includes a 28-lead soic and snaphat top (to be ordered separately); (9)soic package provides direct connection for a snaphat top contains the battery and crystal; (10)pin and function compatible with bq3285/7a and ds128887.

Diagrams

M48T86PC1 block diagram 

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