M48T86SH View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M48T86SH

5V PC REAL TIME CLOCK

STMicroelectronics 

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

SNAPHAT (SH)

Battery/Crystal

28

1

SOH28 (MH)

24

1

PCDIP24 (PC)

Battery/Crystal

CAPHAT

Figure 1. Logic Diagram

VCC

8

AD0-AD7

E

R/W

DS

AS

RST

RCL

MOT

M48T86

SQW

IRQ

VSS

AI01640

May 2000

1/23

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