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Replacement Transformer Started by ncag Dwtasheet at 7: Note that this is a very old chip. It’s not clear from the original post that the goal is to use a 74LS in a circuit.

In my 40 plus years in the business I don’t think I’ve ever seen that despite using the part on numerous occasions. Hero Banned Aug 29, Papabravo Well-Known Member Oct 2, Here’s the datasheet datassheet the store page: A value like 10K on each switch should work well. But you’re likely to never get a response with large bold messages.

Just look at the date of the OP Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. I’m usually pretty good at spotting such “revivals”, but this one escaped.


Datasheet, PDF – Alldatasheet

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Potentiometer Questions Started by norbss Yesterday at Post as a guest Name. Note that the value given is positive 40 uAwhich means that the external circuit must source current in order to drive the input high — i.

74189 Datasheet

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What actually happened is that they were renamed. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policy dataseet, and that your continued use of the website is subject to these policies.

Look at the datasheet again.

Media New media New comments Search media. Notice also that the identical post has occurred on multiple forums. Sign up using Email and Password. If you’re after some memory pull some cache chips from an old Home Questions Tags Users Unanswered.

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TTL-series SRAM demonstration

The wires I had bought were faulty. Papabravo Well-Known Member Oct 10, Yes I know the LEDs are inverted but the chips sense outputs are inverted too Here’s the datasheet and the store page: Email Required, but never shown. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policy datzsheet, and our Terms of Service.

Yes I know the LEDs are inverted but the chips sense outputs are inverted too.

electronic enthusiasts out there!!! internal circuirtry of 74LS189-64-bit RAM

To participate you need to register. The only databook I have that has anything on it dates fromand byit was no longer listed in any of them. Or rather, were never consistently named in the first place, and eventually everyone stopped using the 74xxx designations.