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DS12887+, DS12887A, DS12887A+

Table of contents:
Info of DS12887+
Info of DS12887A
Info of DS12887A+

DS12887+, DS12887A, DS12887A+ Selling Leads, Datasheet

MFG:Maxim Integrated Products Category:Integrated Circuits (ICs) Package Cooled:07+ D/C:DIP

DS12887+, DS12887A, DS12887A+ Datasheet download

Five Points

Part Number: DS12887+

Category: Integrated Circuits (ICs)

MFG: Maxim Integrated Products

Package Cooled: 07+

D/C: DIP

Description: IC RTC W/RAM 128 BYTE 24-EDIP

Price Break

1
25
50
100

Unit Price

8.96000
6.76000
5.19000
4.50000

Extended Price

8.96
169.00
259.50
450.00

(All prices are in USD) Prices for reference only

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DS12887+ Parameters

Technical/Catalog Information	DS12887+
Vendor	Maxim Integrated Products
Category	Integrated Circuits (ICs)
Date Format	YY-MM-DD-dd
Time Format	HH:MM:SS (12/24 hr)
Voltage - Supply	4.5 V ~ 5.5 V
Interface	Parallel
Memory Size	114B
Package / Case	24-DIP (600 mil) Module
Packaging	Tube
Type	Clock/Calendar/NVSRAM
Operating Temperature	0°C ~ 70°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	DS12887+ DS12887+

DS12887A Parameters

Technical/Catalog Information	DS12887A
Vendor	Dallas Semiconductor
Category	Integrated Circuits (ICs)
Date Format	YY-MM-DD-dd
Time Format	HH:MM:SS (12/24 hr)
Voltage - Supply	4.5 V ~ 5.5 V
Interface	Parallel
Memory Size	114 bytes
Package / Case	24-EDIP
Packaging	Tube
Type	Clock/Calendar/NVSRAM
Operating Temperature	0°C ~ 70°C
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	DS12887A DS12887A

DS12887A General Description

The DS12887A real-time clock plus RAM is designed to be a direct replacement for the DS1287A. The DS12887A is identical in form, fit, and function to the DS1287A, and includes additional 64 bytes of general-purpose RAM. Access to this additional RAM space is determined by the logic level presented on AD6 during the address portion of an access cycle. The RCLR pin is used to clear (set to logic 1) all 114 bytes of general purpose RAM but does not affect the RAM associated with the real-time clock. In order to clear the RAM, RCLR must be forced to an input logic 0 (-0.3V to +0.8V) during battery-backup modewhen V_CC is not applied. The RCLR function is designed to be used via human interface (shorting to ground manually or by switch) and not to be driven with external buffers.

For a complete description of operating conditions, electrical characteristics, bus timing and pin descriptions other than RCLR , see the DS12887 data sheet.

DS12887A Features

` Drop-in replacement for IBM AT computer clock/calendar
` Pin compatible with the MC146818B and DS1287A
` Totally nonvolatile with over 10 years of operation in the absence of power
` Self-contained subsystem includes lithium, quartz, and support circuitry
` Counts seconds, minutes, hours, days, day of the week, date, month, and year with leapyear compensation valid up to 2100
` Binary or BCD representation of time, calendar, and alarm
` 12- or 24-hour clock with AM and PM in 12- hour mode
` Daylight Savings Time option
` Selectable between Motorola and Intel bus timing
` Multiplex bus for pin efficiency
` Interfaced with software as 128 RAM locations
14 bytes of clock and control registers
114 bytes of general-purpose RAM
` Programmable square-wave output signal
` Bus-compatible interrupt signals ( IRQ )
` Three interrupts are separately softwaremaskable and testable
Time-of-day alarm once/second to once/day
Periodic rates from 122s to 500ms
End-of-clock update cycle

DS12887A Connection Diagram

DS12887A+ Parameters

Technical/Catalog Information	DS12887A+
Vendor	Maxim Integrated Products
Category	Integrated Circuits (ICs)
Date Format	YY-MM-DD-dd
Time Format	HH:MM:SS (12/24 hr)
Voltage - Supply	4.5 V ~ 5.5 V
Interface	Parallel
Memory Size	114B
Package / Case	24-DIP (600 mil) Module
Packaging	Tube
Type	Clock/Calendar/NVSRAM
Operating Temperature	0°C ~ 70°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	DS12887A+ DS12887A+

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