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M48T86PC1F Datasheet(PDF) 1 Page - STMicroelectronics |
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M48T86PC1F Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 36 page  February 2007 Rev 5 1/36 1 M48T86 5.0 V PC real-time clock 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 ■ Clock accuracy better than ±1 minute per month ■ 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 24 1 PCDIP24 (PC) Battery/Crystal CAPHAT 28 1 SNAPHAT (SH) Battery/Crystal SOH28 (MH) www.st.com |
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