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DS12887

DS12887
型号:DS12887
品牌:DALLAS DALLAS
批号:13+
封装:Standard
原价:25
数量:56654
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订购电话:86755-83294757
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详细描述

DS12887 - Real Time Clock

FEATURES

ß Drop–in replacement for IBM AT computer

clock/calendar

ß Pin-compatible with the MC146818B and

DS1287

ß Totally nonvolatile with over 10 years of

operation in the absence of power

ß Self–contained subsystem includes lithium,

quartz, and support circuitry

ß Counts seconds, minutes, hours, days, day of

the week, date, month, and year with leap

year compensation valid up to 2100

ß Binary or BCD representation of time,

calendar, and alarm

ß 12– or 24–hour clock with AM and PM in

12–hour mode

ß Daylight Savings Time option

ß Selectable between Motorola and Intel bus

timing

ß Multiplex bus for pin efficiency

ß Interfaced with software as 128 RAM

locations

– 14 bytes of clock and control registers

– 114 bytes of general purpose RAM

ß Programmable square wave output signal

ß Bus–compatible interrupt signals ( IRQ )

ß Three interrupts are separately software–

maskable and testable

– Time–of–day alarm once/second to

once/day

– Periodic rates from 122 ms to 500 ms

– End of clock update cycle

DESCRIPTION

The DS12887 Real Time Clock plus RAM is designed to be a direct replacement for the DS1287. The

DS12887 is identical in form, fit, and function to the DS1287, and has an 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. A lithium energy source, quartz crystal, and write–

protection circuitry are contained within a 24–pin dual in-line package. As such, the DS12887 is a

complete subsystem replacing 16 components in a typical application. The functions include a nonvolatile

time–of–day clock, an alarm, a one-hundred–year calendar, programmable interrupt, square wave

generator, and 114 bytes of nonvolatile static RAM. The real time clock is distinctive in that time–of–day

and memory are maintained even in the absence of power. 

由于客户采购批量与样品的价格不同,网上无法统一注明,请您把采购型号通过邮件或客服QQ:2850151585 发给我们,也可以拨打明佳达国内销售部电话:0755-83957301,由客服人员为您报价;有时元件厂商价格稍许变动,本公司未能及时调整,如您觉得售价稍高,请与我们说明并适当议价,感谢支持!

 

 

 

MJD is a corporation which engaged in agency electronic components. MJD Through seventeen years unrimitting efforts,  aspire to provide our customers with world-leading products and service. Now already became a one of the most famous electronic components distributor in China.

 

 

 

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 PAYMENTS:

We support the following payment methods:

 1. Paypal

 2. Western Union 

 3. Bank Wire (TT)

 4. MoneyGram

Shipping:

1. MJD needs about 3 BUSINESS DAY to handle the order after received payment. after receiving your payment. Otherwise, we will state it in the invoice in advance.

2. MJD can Ship via your shipping account (DHL / FEDEX / UPS / TNT or others) as your instruction. Or Ship via our shipping account (We have a very good relationship with DHL and FEDEX with very special freight).

 

 

3. Regarding the declared value on the package for customs clearance, we are pleased to follow

 

 

 

your wishes, just feel free to inform us when ordering.

4. Any import fees or charges are the buyer's responsibility.

REFUNDS & RETURN:

We offer a warranty on all items that we sold. Item will be tested before ship,it will be in good condition,if there are some problems with the item,feel free to contact us.Please Email us to notify a defective item. Unless otherwise specified, this item comes with 30 days warranty from the shipment date.

 

 

You must contact us before returning any product. All returns must be made within 30 days from this shipment date.Return must be in new condition(the SAME CONDITION as it was sent to you)

 

 

 

Because of wholesale price is different from sample price, our website can not state. Please send your required part number via email Sales@hkmjd.com or skype id mjdccm898 to us.  As well as welcome you call us : 0755-83957301  We will send offer for you;  Sometimes manufacturer's price is unstable, so we don't adjust price in time. if you feel price is a little high for you, just feel free to contact us for consultation. Thank you for your support !

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