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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Datasheets, Manuals or Parts. Hero Banned Aug 29, Here’s the datasheet and the store page: Of course you need it ASAP.

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

Email Required, but rzm shown. I thought pullup resistors were only necessary for CMOS. Depending on how it was stored over the past 40 years, the chip you have may simply have expired from old age. Here is what I imagine. The wires I had bought were faulty. Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.

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Look at the datasheet again. Articles Top Articles Search resources. By continuing to use this 741889, you are consenting to our use of cookies.

74189 RAM 16 x 4 con salida de 3 estados

Thread starter earlbesario Start date Oct 2, 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.

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Or rather, were never ramm named in the first place, and eventually everyone stopped using the 74xxx designations. You need pullup resistors. Papabravo Well-Known Member Oct 10, Sign up using Email and Password.

(PDF) 74189 Datasheet download

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I’m usually pretty good at spotting such “revivals”, but this one escaped. A value like 10K on each switch should work well.


Replacement Transformer Started by ncag Today at 7: For a better experience, please enable JavaScript in your browser before proceeding.

Pioneer Elite vsxtx water damage no power Started by Watin 43 minutes ago Replies: Papabravo Well-Known Member Oct 2, 74198 Just look at the date of the OP The issue was the equipment I was using. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at If you’re after some memory pull some cache chips from an old By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

But you’re likely to never get a response with large bold messages. To participate you need to register. What actually happened is that they were renamed.