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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Sign up using Facebook. Just look at the date of the OP You must log in or register to reply here. Datasheets, Manuals or Parts. Hero Banned Aug 29, Note that this is a very old chip. 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.

But you’re likely to never get a response with large bold messages. Forums New posts Search forums.

(PDF) Datasheet PDF Download – Bit RAM

Here’s the datasheet and the store page: Sign up using Email and Password. Notice also that the identical post has occurred on multiple forums. 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.


It’s neither elegant, nor efficient but it does perform the function. Articles Top Articles Search resources. The issue was the equipment I was using.

Thread starter earlbesario Start date Oct 2, Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, dam and gadgets. Notice eam again that the original poster seldom returns.

I’m usually pretty good at spotting such “revivals”, but this one escaped. Papabravo Well-Known Member Oct 774189, The only databook I have that has anything on it dates fromand byit was no longer listed in any of them. Papabravo Well-Known Member Oct 10, Replacement Transformer Started by ncag Today at 7: By continuing to use this site, you are consenting rak our use of cookies.

It’s not clear from the original post that the goal is to use a 74LS in a circuit. They’re SRAM, 32KB each, and while you’d never need it all you 71489 easily only use the first 3 address bits data is accessed 8 bits at a time and ignore the rest.

For a better experience, please enable JavaScript in your browser before proceeding. You need pullup resistors. Here is ran I imagine.

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(PDF) 74189 Datasheet download

Of course rak need it ASAP. If you’re after some memory pull some cache chips from an old Email Required, but never shown.


Note that the value given is positive 40 uAwhich means that the external circuit must source current in order 7419 drive the input high — i. Home Questions Tags Users Unanswered. In my 40 plus years in the business I don’t think I’ve ever seen that despite using the part on numerous occasions.

Where are the pullup resistors for your switches? The wires I had bought were faulty. Pioneer Elite vsxtx water damage no power Started by Watin 43 minutes ago Replies: Look at the datasheet again. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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

What actually happened is that they were renamed. Depending on how it was stored over the past 40 years, the chip you have may simply have expired from old age. Welcome to our site! Or rather, were never consistently named in the first place, and eventually everyone stopped using the 74xxx designations.

A value like 10K on each switch should work well. Media New media New rwm Search media. Are these guys all members of the same class, or worse, team in a class?