Buy EPROM K-Bit 32K x 8 ns Pin DIP. 27C 27C 27C 27C 27C M27CBF1. M27CBF1. The Microchip Technology Inc. 27C is a CMOS K bit electrically Programmable Read Only Memory (EPROM). The device is organized as 32K words by. I believe the 29Cxxx series is now mostly flash memory. Digi-Key appears to have several thousand of the 32Kx8 AT28C EEPROM’s, which.

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Ellen Spertus 2 9 I believe the 29Cxxx series is now mostly flash memory. Robustness to student wiring mistakes would be great.

Lot 10X eprom 27C256 or 27256 + Flash programmation included

I don’t have experience with FPGAs. Eprpm didn’t say which package you are using, I assuming it is a pin DIP. I find the hands-on work, including the debugging, to really get this information across to all levels of students. I also don’t care about speed. The goal of my course, which is the introductory and only architecture course at a liberal arts college, is for students to understand all the way down to the gate level how computers work, not to directly prepare them for industry.

Perhaps the limited available time could be used more productively with modern hardware. Not an ‘answer’ per se, just an opinion: I like the Nexys2, personally, and the books by Haskell and Hanna look pretty good for bringing newbies up to speed.


I’ve never used the 28C family. JohnMiles, could you elaborate? I’ve been using the pin DIP package.

It’ll put the students in touch with the hardware in a way that an 72c256 microprocessor or FPGA chip can’t match. I don’t think you’re doing your students any favors by getting them to build stuff out of series TTL in this day and age. I hope to inspire some to grad school.

What’s a good EEPROM replacement for a 27C/29C? – Electrical Engineering Stack Exchange

Could you let me know why you think a FPGA approach would be better and point me to any educational material? You could also try Jameco. There are still a few parallel flash chips available in DIP, e. One more comment in the form of an actual answer: There is also a 8Kx8 version of the same chip with 27c526 compatible pinout unused address lines are no connects.

It is a little cheaper in price, and also in stock. Can you tell me anything about it? By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

John Miles 3 5. Would the 28C family be a good place to look? However, it struck me that you must be spending a lot of time getting them to the point where they understand what they’re hooking up, and why. They tend to be higher capacity than eeprom devices, so more address lines to tie but otherwise equivalent to eeprom for your purposes.


Broke into two comments since the edit 27f256 doesn’t seem to work Have you checked out some of the boards available at www. I’d be happy with as few as 8 address bits we use two LSs for the PCalthough I doubt anyone makes something that small. Specifically, it should be reasonably priced, reliable, easily available and likely to remain so.

Home Questions Tags Users Unanswered. The instructions are read by a low-speed TTL computer they build. The users who voted to close gave this specific reason: This question appears to be off-topic. It doesn’t need to be pin-compatible, although that would be nice. Instead, describe your situation and the specific problem you’re trying to solve.