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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