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M48T86PC Datasheet(PDF) 1 Page - STMicroelectronics |
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M48T86PC Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 23 page  1/23 May 2000 M48T86 5V PC REAL TIME CLOCK s DROP-IN REPLACEMENT for PC COMPUTER CLOCK/CALENDAR s COUNTS SECONDS, MINUTES, HOURS, DAYS, DAY of the WEEK, DATE, MONTH and YEAR with LEAP YEAR COMPENSATION s INTERFACED WITH SOFTWARE AS 128 RAM LOCATIONS: – 14 Bytes of Clock and Control Registers – 114 Bytes of General Purpose RAM s SELECTABLE BUS TIMING (Intel/Motorola) s 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 s PROGRAMMABLE SQUARE WAVE OUTPUT s SELF-CONTAINED BATTERY and CRYSTAL in the CAPHAT DIP PACKAGE s PACKAGING INCLUDES a 28-LEAD SOIC and SNAPHAT® TOP (to be Ordered Separately) s SOIC PACKAGE PROVIDES DIRECT CONNECTION for a SNAPHAT TOP CONTAINS the BATTERY and CRYSTAL s PIN and FUNCTION COMPATIBLE with bq3285/7A and DS128887 Figure 1. Logic Diagram AI01640 E VCC M48T86 RCL RST VSS 8 AD0-AD7 MOT R/W DS AS IRQ SQW 28 1 24 1 SOH28 (MH) SNAPHAT (SH) Battery/Crystal PCDIP24 (PC) Battery/Crystal CAPHAT |
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