M48T86 データシートの表示（PDF） - Unspecified

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M48T86

5.0V PC Real-Time Clock

Unspecified 

ARTSCHIP

M48T86

5.0V PC Real-Time Clock

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

Figure 1. 24-pin PCDIP, CAPHAT™ Package

24

1

PCDIP24 (PC)

Battery/Crystal

CAPHAT

Figure 2. 28-pin SOIC Package

SNAPHAT (SH)

Battery/Crystal

28

1

SOH28 (MH)

April 2004

1/29

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