Category. Description, 16K 2K x 8 Parallel Eeprom with Software DATA Protection. Company, ST Microelectronics, Inc. Datasheet, Download 28C16 datasheet. It is offered only with the TSOP28 package. The reader should refer to the M28C17 datasheet for more information about the Ready/Busy func- tion. OPERATION. FAST ACCESS TIME: 90ns. SINGLE 5V ± 10% SUPPLY VOLTAGE. LOW POWER CONSUMPTION. FAST WRITE CYCLE: – 64 Bytes Page Write Operation.

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I have one of those, it works great.

Anyone familiar with these parts? If the user put the ratasheet on wrong, the 74LS would turn into a 74LS mount st helens. Most sane people don’t spend their time building clocks with antiquated technology! Search Only Within This Topic. What do I need to do, in order to write data to the or 28C16? This situation was usually handled by either running the whole memory space for the slowest device, or for the fastest memory, and then adding ‘wait-states’ for the slower devices.

Reminds me of the Old Apple ][ Disk ][ Drives. It’s easy to find info on the 28C Again, read the data sheet carefully and make sure it’s for the exact same device and manufacturer.

First hit on google: Egg on my face. Number one rule of experimenting is to alway be sure to identify off spec parts to avaoiod re-using them as good ones.


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28C16 EEPROM used in Commodore and Amiga equipment

Most new ones withwrite cycles, before data transfers get iffy. So, I decided to do a little experiment: Back in the late ‘s I had an S based programmer that did ‘s and ‘s. It reads just fine, but it won’t take any new data. A needed a write pulse longer than uS ,nSbut shorter than 1mS 1,nS.

28C16 Datasheet(PDF) – STMicroelectronics

Their site has forums that may point you in the right direction. That’s why several types of memory had similar pinouts, though hardwire jumpers also had to be set, due to the differences.

CPU and memory cards where made to accommodate this situation. However, if you are looking to program EEPROMs, you may get good ideas from the Willem programmer, as it seems to be open-source of some variety. Got away without needing a pulse.

I’ve never used the Willem Programmer, I don’t sell it, etc. Some as low a 10, Two E’s instead of one Big difference. Sometimes 2 extra supplies.

28C16 Datasheet PDF

Back when I just got started in the electronics business, I was working as tech and general slave. If you write to the same address at one write per 10mS, you’d kill that byte in about 20 minutes.

Otherwise, you can write single bytes to it, by pausing after each datawheet. Mine did arrive with a construction error though, a resistor was the wrong value and caused datasjeet programming voltage to be too low and writing would fail most of the time after the first few uses. When I set up my shop a few years ago when I started grad school, I got a programmer from Conitec. Chuck Richards Chuck, The is an electrically-erasable version of the This cannot be undone.


Writing was a bit different. What am I missing here? At 10mS per byte, it would get quite tiresome. Subject of the 28v16 topic: A ZIF socket was inserted in one of those slots.

To go even more off-topic Hello, Forgive this slightly off-topic question: D to be more accurate: There are algorithms coded into the programmers to hit the EPROM with the appropropriate voltages for specific time periods.

They are not intended to hold actual program code, even though you could do this. One day A good customer came in the shop all upset that his drive was dead, I hald it to my nose and went to the back to get a screwdriver and a chip.

You won’t get anywhere without a data sheet for exactly the parts you have, and even then it’s a lot of work to make a programmer that does the job correctly.

Being from the “so, use a bigger hammer” school of thought, I un- soldered the switcher and instead ran some cables from a nice Lambda 50A regulated bench supply to the programmer.

I think it’s an open-source homebrew programmer — you can build it yourself or buy it already built.