74189 RAM PDF

Part Number, Number of Items, 2. Brand Name, MAJOR BRANDS. Item Weight, Material, Aluminum. UNSPSC Code, IC RAM IC type is a 16 * 4 RAM. The internal logic is similar to the circuit shown in Fig. for a 4 * 4 RAM. The pin assignments to the inputs and outputs . The random access memory (RAM) stores the program the computer is executing 74LS 4-bit D register · bit RAM · 74LS 8-bit bus transceiver.

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Welcome to our site! For a better experience, please enable JavaScript in your browser before ran. Depending on how it was stored over the past 40 years, the chip you have may simply have expired from old age. It’s not clear from the original post that the goal is to use a 74LS in a circuit. They were only made in the s.

TTL-series SRAM demonstration

Of course you need it ASAP. Media New media New comments Search media. Note that this is a very old chip. By using our site, you acknowledge eam you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. A value like 10K on each ra should work well. If you’re after some memory pull some cache chips from an old Post as a guest Name.


The wires I had bought were faulty. Sign up using Email and Password. Yes I know the LEDs are inverted but the chips sense outputs are inverted too. Click here to register now. Pioneer Elite vsxtx water damage no power Started by Watin 43 minutes ago Replies: Articles Top Articles Search resources. Here 774189 what I imagine.

digital logic – TTL tri-state 16×4 RAM chip not working – Electrical Engineering Stack Exchange

Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Post Your Answer Discard By clicking 7418 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.

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(PDF) 74189 Datasheet download

The only databook I have that has anything on it dates fromand byit was no longer listed in any of them. Just look at the date of the OP I’m usually pretty good at spotting such “revivals”, but this one escaped.

What actually happened is that they were renamed.


Sign up or log in Sign up using Google. Hero Banned Aug 29, Look at the datasheet again. I thought pullup resistors were only necessary for CMOS. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.

By continuing to use this site, you are consenting to our use of cookies. Datasheets, Manuals or Parts. Replacement Transformer Started by ncag Today at 7: Notice also that the identical post has occurred on multiple forums. But you’re likely to never get a response with large bold messages. The issue was the equipment I was using. Papabravo Well-Known Member Oct 10, Papabravo Well-Known Member Oct 2, In my 40 plus years in the business I don’t think I’ve ever seen that despite using the part on numerous occasions.

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Electro Tech 7489 an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Thread starter earlbesario Start date Oct 2, Sign up using Facebook.