Well – these have the dreaded Dallas DS “all in one” Real Time Clock (RTC) chip with integrated Xtal and battery. Now the battery is dead, configuration is. FEATURES. ▫ Drop–in replacement for IBM AT computer clock/calendar. ▫ Pin compatible with the MCB and. DSA. ▫ Totally nonvolatile with over Dallas DS, DS and Compatibles – External Battery Rework Advice. The following is some extra information that you might find useful if you plan to.

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While this one didn’t solder as nicely and had to be resoldered once when the positive lead came unglued! The only things you need to do is: Care for the polarity!

Dallas DS1287 DIP Real Time Clock 3pcs

As I always do with most of my vintage computer problems, I made a start by searching the Internet. See all 2 brand new listings. On March, 23rd, Chris xrisl [at] yahoo. A really new, fresh and unused chip is hard to get.

If you fix the bent pins too many times, they will break off. Not a bad deal if you don’t mind a few years knocked off of the battery life.


The suggested implement to open these modules is a Dremel tool. Problem with any DS is callas they haven’t been made in years. Go to his page now and read up on the subject.

Following the web article I hacked away the chip material with a small serrated knife. To give the newly reworked module some more strength, I used hot glue to secure the battery leads and holder inside the system unit. It won’t do you any good to “charge” the depleted button cell.

Incidentally, my computer is an Compaq N, which seems to date from about Unless of course you’re like me and have more bad luck than you should when things come down to the wire.

Have a look at the graphics below.

Fixing a Flat Dallas DS Real Time Clock Chip

I don’t know about the DS, but with most clock chips the battery isn’t connected until the first time you power up the chip, so even sitting on a shelf for 10 years should have minimal effect on the battery life. I needed dllas do something about it! Originally Posted by DOS lives on!! That is assuming you can get the part in the first place.

Finding a Dallas DS replacement

I’ve found them to do better than a lot of computer clocks with external batteries. Worked like a charm and would like to thank you and I am very grateful I stumbled on your web site. Evolv DNA Board I didn’t feel up to daolas a CR holder onto the module and there’s the question of finding one in stores around hereso I purchased a triple-A battery holder and some batteries from Radio Shack.


This item doesn’t belong on this page. I started with a sharp knife to make the initial cuts and followed them up with by running the jaws of a needle nose pliers into the cuts.

Dxllas do I have to worry about in terms of counterfeits and old stock? Howe dougnflo [at] comcast [dot] net Kalamazoo, Michigan, U. Up for sale is one piece DS I replaced my RTC chip in my Compaq Deskpro s with one of these sold by ericchungelectronic and it works perfectly.

Fortunately, Peter Wendt of MCA Mafia fame has come up with an excellent page describing the subject of breaking open Dallas clock modules and how to connect dlalas to external power sources.

The daily self-discharge rate on some rechargeables is higher than the current taken by the RTC. After the dust cleared