DS1287 PDF

11 Oct A classic computer article by Terry Stewart (Tezza). Fixing a Flat Dallas DS Real Time Clock Chip. 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. 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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It won’t do you any good to “charge” the depleted button cell. Attached the two wires to the exposed pins and put the new lithium cell in the holder.

Curiosity killed that cat. I just want to tell you that I succesfully used your DS rework How-to.

Reworking the DS / DS RTC chip

What’s the date code on yours? I used a medium sized flat file Howe dougnflo [at] comcast [dot] net Kalamazoo, Michigan, U. It doesn’t take too long to figure out that the DS and other, similar modules could be re-energized with a new battery. United States Postal Service: Login is required for subscription.

My hack job can be seen below. All in all, the repair took about a hour and was pretty straightforward. For anyone who attempts this mod Not easy when dealing with a computer over 20 years old. What application are you planning to use this part for?


In most machines this problem is easily rectified, simply requiring an over-the-counter 3 to 6v battery ds1827 on the motherboard.

It isn’t a soldering job to be proud of and it’s not too pretty but the connections are quite secure.

GW Repair Board for DS RTCs from The Glitch Works on Tindie

You will want it later if your work bench isn’t near a computer. You did a great job! Embedded Security Security Managers. As I always do with most of my vintage computer problems, I made a start by searching the Internet.

Soon I’d uncovered the two pins I needed to access photo 2. The usual reason for these errors is a flat CMOS battery.

Show More Show Less. Without that webpage, I would never have thought of repairing it like that! The failure rates are summarized by technology and mapped to the associated material part numbers.

Dallas DS1287 DIP Real Time Clock 3pcs

Save on Other Integrated Circuits Trending price is based on prices over last 90 days. Ds12877 device is accessed through a multiplexed byte-wide interface, which supports both Intel and Motorola modes.


This was quicker, although it made more of a mess and the module didn’t solder as nicely as the first.

The only serious drawback is the battery inside the module does eventually fail. Soldering was the ds2187 big thing. In fact, go print a copy of it right now.

Have a look at the graphics dz1287. This item doesn’t belong on this page. It involved hacking away parts of the chip, then rewiring an external battery onto it.

The serrations in the jaws slowly dug deeper into the potting resin and it wasn’t too long before I saw the first battery contact. Please provide as much detail as sd1287 in your answers. Incidentally, my computer is an Compaq N, which seems to date from about Add different End Customer. Bookmarks Bookmarks Digg del. William Walsh did the DS-Rework to get an external battery to it as well.

I’ll let you all know how it turns out. See details for additional description.