AT28C64 DATASHEET PDF

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After looking at the datasheets, I notice the difference in pin-out between the two chips is that on the AT28C64, A13 and A14 are replaced with NC no connects. Home Questions Tags Users Unanswered. For memory chips in particular, pins that get used as address pins in larger parts and are NC pins in smaller parts can usually be connected.

AT28C64 Datasheet PDF

Sign up using Email and Password. I created a circuit in which all the address inputs of an AT28C are connected to outputs of shift registers 74HC They can usually answer these types of questions.

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With that resistor in series with pin 1, datassheet in an 8K ROM instead of the 32K one should work just fine. There are “No Connect” NC pins, those are not connected in the chip so you can hook them up to a voltage. And if the datasheet is not absolutely clear, contact the vendor.

AT28C64 Datasheet PDF

Sign up or log in Sign up using Google. Well no connect could mean do not connect or does not connect.

The datasheet of the AT28C64 makes it pretty clear: Other times there may not even be a wire bond between the silicon and the pin, so you are free to do whatever you want with it. In the future I will do many of these datzsheet, however I haven’t yet decided if I need the full 32KB of memory.

That’s the obvious part. Post as a guest Name.

Sometimes no connect pins are special function pins and they don’t want you to connect to them. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. In general, except in cases where the manufacture is specifically supporting compatible footprints between different parts, you should not connect to the NC pins.

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This does exactly what you say, i.

AT28C64 Datasheet(PDF) – ATMEL Corporation

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Is it OK anyway to connect such pins to outputs of shift registers and be able to make a AT28C64 like a drop-in replacement for AT28C or are the NC pins internally connected to something?

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