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

Where are the pullup resistors for your switches? Arm on how it was stored over the past 40 years, the chip you have may simply have expired from old age.

Notice once again that the original poster seldom returns. What actually happened is that they were rzm. Are these guys all members of the same class, or worse, team in a class?

In my 40 plus years in the business I don’t think I’ve ever seen that despite using the part on numerous occasions. Of course you need it ASAP. Sign up using Email and Password. Media New media New comments Search media. You need pullup resistors.

Datasheets, Manuals or Parts. But you’re likely to never get a response with large bold messages. Or rather, were never consistently named in the first place, and eventually everyone stopped using the 74xxx designations. Thread starter earlbesario Start date Oct 2, To participate you need to register. Yes I know the LEDs are inverted but the chips sense outputs are inverted too. Here is what I imagine.


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74189 RAM 16 x 4 con salida de 3 estados

Here’s the datasheet and the store page: They were only made in the s. A value like 10K on each switch should work well. Yes I know the LEDs are inverted but the chips sense outputs are inverted too Here’s the datasheet and the store page: It’s neither elegant, nor efficient but it does perform the function. The only databook I have that has anything on it ra, fromand byit was no longer listed in any of them.

Email Required, but never shown. 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.


(PDF) 74189 Datasheet download

Papabravo Well-Known Member Rram 10, For a better experience, please enable JavaScript in your browser before proceeding. It’s not clear from the original post that the goal is to use a 74LS in a circuit. Articles Top Articles Search resources. The issue was the equipment I was using.

Click here to register now. Look at the datasheet again.

Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Sign up using Facebook. You must log in or register to reply here. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Just look at the date of the OP Post as a guest Name. 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.

(PDF) Datasheet PDF Download – Bit RAM

Welcome to our site! I thought pullup resistors were rsm necessary for CMOS. I’m usually pretty good at spotting such “revivals”, but this one escaped. Papabravo Well-Known Member Oct 2, Notice also that the identical post has occurred on multiple forums.