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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Worked like a charm and would like to thank you and I am very grateful I stumbled on your web site. So you have my thanks and gratitude for putting that idea on the web. I could not have gotten my Compaq DeskPro dallass back to clock life back without you! It works like a champ!

Dallas DS DIP Real Time Clock 3pcs | eBay

In fact, go print a copy of it right now. Almost immediately I found an article written by someone who had the same issue and had dallae a solution. Whatever you do, handle the pins on the module carefully. Show More Show Less.

Dallas DS1287 DIP Real Time Clock 3pcs

Originally Posted by DOS lives on!! Care for the polarity! The serrations in the jaws slowly dug deeper into the potting d1s287 and it wasn’t too long before I saw the first battery contact.


The 0V-reading tells you that you successfully disconnected the battery. In most machines this problem is easily rectified, simply requiring an over-the-counter 3 to 6v battery replacement on the motherboard. They have a tendency to bend when dqllas aren’t looking.

Save on Other Integrated Circuits Trending price is based on prices over last 90 days. For the second module I reworked, I did all of the work using a moderately sized side cutters.

Following the web article I hacked away the chip material with a small serrated knife. Incidentally, my computer is an Compaq N, which seems to date from about I went through five or six DS modules before deciding that this method wasn’t going to work for me. There exists no modern day replacement for these, so re-energizing them is the only option.

Every time I booted up the machine, I was greeted with the errors above. Rather neat perhaps, until the battery goes flat in which case the whole chip needs to be replaced! Ordinarily, there’s a lot to like about the Dallas clock modules.

The case is usually pretty much “solder-resistive” because of the anti-corrosion plating. My Dremel tool–while a nice piece of equipment–spins at a minimum of 5, RPM and was all too happy to open not only the potting compound, but also the IC and in some cases, even the battery. You did a great job! It won’t do it no good and may result in early death of that part due to excessive internal heating.


A couple weeks ago when I finally got around to hooking it up 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”.

All times are GMT I replaced my RTC chip in my Compaq Deskpro s with one of these sold by ericchungelectronic and it works perfectly.

Most likely you won’t get a wire soldered properly to it. For anyone who attempts this mod All power to the Internet and particular thanks to Peter.

Up for sale eallas one piece DS Should work like a charm. Then the battery and xtal are placed atop of the chip, connected to the pins and everything is covered with a pretty rigid protective compound.

Dallas DS, DS and Friends – Rework Advice

I know the DS is a newer replacement, but is it still in production? I needed to do something about it! Then circumstances kept me from working with it until now