Programmable IC Chip DS1286+ - Dallas Semiconductor - Watchdog Timekeeper

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Description

Detailed Product Description

 

Quick Detail:

 

Watchdog Timekeeper

 

 

Description:

 

The DS1286 Watchdog Timekeeper is a self-contained real time clock, alarm, watchdog timer, and interval timer in a 28-pin JEDEC DIP package. The DS1286 contains an embedded lithium energy source and a quartz crystal which eliminates the need for any external circuitry. Data contained within 64 eightbit registers can be read or written in the same manner as bytewide static RAM. Data is maintained in the

Watchdog Timekeeper by intelligent control circuitry which detects the status of VCC and write protects memory when VCCis out of tolerance. The lithium energy source can maintain data and real time for over

10 years in the absence of VCC. Watchdog Timekeeper information includes hundredths of seconds, seconds, minutes, hours, day, date, month, and year. The date at the end of the month is automatically adjusted for months with less than 31 days, including correction for leap year. The Watchdog Timekeeper operates in either 24-hour or 12-hour format with an AM/PM indicator. The watchdog timer provides alarm windows and interval timing between 0.01 seconds and 99.99 seconds. The real time alarm provides for preset times of up to one week.

 

 

Applications:

 

 Keeps track of hundredths of seconds, seconds, minutes, hours, days, date of the month, months, and years; valid leap year compensation up to 2100

 Watchdog timer restarts an out-of-control processor

 Alarm function schedules real time-related activities

 Embedded lithium energy cell maintains time, watchdog, user RAM, and alarm information

 Programmable interrupts and square wave outputs maintain 28-pin JEDEC footprint

 All registers are individually addressable via the address and data bus

 Accuracy is better than ±1 minute/month at 25°C

 Greater than 10 years of timekeeping in the absence of VCC

 50 bytes of user NV RAM

 

 

Specifications:

 

Datasheets

DS1284,1286

Standard Package

12

Category

Integrated Circuits (ICs)

Family

Clock/Timing - Real Time Clocks

Series

-

Packaging

Tube

Type

Clock/Calendar

Features

Alarm, Leap Year, Square Wave Output, SRAM, Watchdog Timer

Memory Size

50B

Time Format

HH:MM:SS:hh (12/24 hr)

Date Format

YY-MM-DD-dd

Interface

Parallel

Voltage - Supply

4.5 V ~ 5.5 V

Voltage - Supply, Battery

2.4 V ~ 3.5 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Through Hole

Package / Case

28-DIP Module (0.61", 15.49mm) 23 leads

Supplier Device Package

28-EDIP

 

 

Competitive Advantage:

 

Warranty :180 days !
Free shipping: Order over $1000 win a free shipment fee
(goods weight below 3Kg) ,during 20130901-20130930 .


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