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 ..
DS12885Q ,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 ..
DS12885S ,Real-time clock, 14 bytes of clock and control registers, 114 bytes of general purpose RAMpin descriptions other than X1, X2, V , and RCLR , see the DS12887 data sheet. BAT TYPICAL OPERATIN ..
DS12887 ,Real Time ClockFEATURES Drop-in replacement for IBM AT computerclock/calendar Pin-compatible with the MC146818B ..
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)
DS1287A
Real Time Clock
DS1287AReal Time Clock
DS1287A
022798 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 s to 500 msEnd of clock update cycle
PIN ASSIGNMENT24 PIN ENCAPSULATED PACKAGE
VCC
SQW
RCLR
IRQ
RESET
R/W
MOT
AD0
AD1
AD2
AD3
AD4
AD5
AD6
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
RCLR-RAM clear
DESCRIPTIONThe DS1287A is identical to the DS1287 with the addi-
tion of the RAM clear pin. For a complete description of
operating conditions, electrical and mechanical charac-
teristics, bus timing, and pin descriptions see the
DS12887A data sheet.
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
