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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Curiosity killed that cat. Soldering was the next big thing.

Finding a Dallas DS replacement

I went through five or six DS modules before deciding that this method wasn’t going to work for me. Skip to main content. What do I have to worry about in terms of counterfeits and old stock? Ratings and Reviews Write a review. Whatever you do, handle the pins on the module carefully.

Dallas DS1287 DIP Real Time Clock 3pcs

It won’t do you any good to “charge” the depleted button cell. I replaced my RTC chip in my Compaq Deskpro s with one of these sold by ericchungelectronic and it works perfectly. A couple weeks ago when I finally got around to hooking it up There are lots of old threads here on DS replacement. To this day, it’s still chugging along. My old computer has been out of action for months, but this week I got it going again by following the instructions on your webpage “Reworking the DS RTC chip”.


It involved hacking away parts of the chip, then rewiring an external battery onto it. Best rework chip, save lots of diy effort.

Their lifetime is also quite long. Ordinarily, there’s a lot to like about the Dallas clock modules. Up for sale is one piece DS On January, 7th, Emmanuel Da Piedade emmanuel. Any Condition Any Condition.

However d1287 process is not always quite so hassle-free.

The usual reason for these errors is a flat CMOS battery. 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 them to external power sources. Who’s a reliable source and who’s not? This was quicker, although it made more of a mess and the module didn’t solder as nicely as the first. I’m going to have to give the hack a try.

Go with the hot glue. I started with a sharp knife to make the initial cuts and followed them up with by running the jaws of a needle nose eallas into the cuts.

Dallas DS, DS and Friends – Rework Advice

On March, 23rd, Chris xrisl [at] yahoo. Most likely you won’t get a wire soldered properly to it. I appreciate it greatly. These are intended for short-term use with strong charge and discharge intervals – not for long-term storage with a comparatively small discharge rate. Originally Posted by DOS lives on!! You did a great job!

I soldered a 22 solid wire to each of the battery holder pins, then glued the holder to the DS case using model airplane plastic cement.


If you fix the bent pins too many times, they will break off. Dqllas that webpage, I would never have thought of repairing it like that! Save on Other Integrated Circuits Trending price is based on prices over last 90 days. After these pins were exposed, breaking es1287 connection to the internal battery was easy.

Not a bad deal if you don’t mind a few years knocked off of the battery life.

I’ll let you all know how it turns out. I could not have gotten my Compaq DeskPro e back to clock life back without you!

The suggested implement to open these modules is a Dremel tool. Great remanufactured chip I replaced my RTC chip in my Compaq Deskpro s with one of these sold by ericchungelectronic and it works perfectly. I didn’t feel up to soldering 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.

Unless of course you’re like me and have more bad luck than you should when things come down to the wire. This picture shows the second module I reworked in a Model