DS1287 ,Real Time ClockFEATURES PIN ASSIGNMENT• Drop-in replacement for IBM AT computer clock/ca-lendarMOT 1 24 VCCNC 2 23 ..
DS1287. ,Real Time ClockFEATURES PIN ASSIGNMENT• Drop-in replacement for IBM AT computer clock/ca-lendarMOT 1 24 VCCNC 2 23 ..
DS1287.. ,Real Time ClockFEATURES PIN ASSIGNMENT• Drop-in replacement for IBM AT computer clock/ca-lendarMOT 1 24 VCCNC 2 23 ..
DS1287A ,Real Time ClockPIN DESCRIPTION• Selectable between Motorola and Intel bus timingAD0–AD7 - Multiplexed address/data ..
DS12885 ,Real Time Clockpin descriptions other than X1, X2, V , and RCLR , see the DS12887 data sheet. BAT TYPICAL OPERATIN ..
DS12885N ,Real-time clock, 14 bytes of clock and control registers, 114 bytes of general purpose RAMFEATURES PIN ASSIGNMENT (Top View) § Drop-in replacement for IBM AT computer clock/calendar § Pin ..
DTC114TM , NPN 100mA 50V Digital Transistors (Bias Resistor Built-in Transistors)
DTC114TM , NPN 100mA 50V Digital Transistors (Bias Resistor Built-in Transistors)
DTC114TS , DTA/DTC SERIES
DTC114TS , DTA/DTC SERIES
DTC114WCA ,Conductor Holdings Limited - Digital Transistor
DTC114WE , 100mA / 50V Digital transistors (with built-in resistors)
DS1287-DS1287.-DS1287..
Real Time Clock
DS1287Real Time Clock
DS1287
050898 1/1
FEATURESDrop-in replacement for IBM AT computer clock/ca-
lendarPin compatible with the MC146818ATotally nonvolatile with over 10 years of operation in
the absence of powerSelf-contained subsystem includes lithium, quartz,
and support circuitryCounts seconds, minutes, hours, day of the week,
date, month, and year with leap year compensationBinary or BCD representation of time, calendar, and
alarm12- or 24-hour clock with AM and PM in 12-hour modeDaylight Savings Time optionSelectable between Motorola and Intel bus timingMultiplex bus for pin efficiencyInterfaced with software as 64 RAM locations14 bytes of clock and control registers50 bytes of general purpose RAMProgrammable square wave output signalBus-compatible interrupt signals (IRQ)Three interrupts are separately software-maskable
and testableTime-of-day alarm once/second to once/dayPeriodic rates from 122 μs to 500 msEnd of clock update cycle
PIN ASSIGNMENT24 PIN ENCAPSULATED PACKAGE
MOT
AD0
AD1
AD2
AD3
AD4
AD5
AD7
GND
PIN DESCRIPTIONAD0–AD7-Multiplexed address/data bus-No connection
MOT-Bus type selection-Chip select-Address strobe
R/W-Read/write input-Data strobe
RESET-Reset input
IRQ-Interrupt request output (open
drain)
SQW-Square wave output
VCC-+5 volt supply
GND-Ground
DESCRIPTIONThe DS1287 Real Time Clock is designed to be a direct
replacement for the MC146818A. For a complete
description of operating conditions, electrical and
mechanical characteristics, bus timing, and pin descrip-
tions see the DS12887 data sheet.
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
