IC 74161 DATASHEET PDF

These synchronous, presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs. The DM74LSA and. µç×ÓÆ÷¼þ²É¹º½Ì¨£ IC×ÊÁϲéѯÍøÕ¾£º µç×Ó¹ ¤³Ì¼ÊõÂÛ£º / 4 位二进制同步计数器(异步. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counters.

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TTL works much better pulling loads down. That’s probably causing as much trouble as no debounce was. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. I’d reduce that down to something in the nF to 1uF range. Oh, Ill change that and see what happens. Then I used a pullup resistor for the clear switch. Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V.

Since you already need one section of aand there are 6 gates per IC, you simply go. 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.

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For a circuit board with darasheet ground plane, the usual guideline is at least one cap per 5 ICs. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. Whenever I press the clock ddatasheet I get all of the leds on except maybe one or two, with some flashing during the button press.

(PDF) 74161 Datasheet download

I switched the LEDs around and connected their input iic 5V and their ground to the output pins. Post as a guest Name. In that case, invert the signals going to your LEDs. Home Questions Tags Users Unanswered. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Without this buffering, your switch should not work on a button push, only on a release. Sign up using Email and Password. I’m still getting the same effect. For breadboards, use a cap for each IC.

As further issues arise I see myself stuck once more with a dysfunctional circuit. Finally, you should not count on TTL outputs driving high, as you have shown. 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.

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74LS161 Synchronous 4-Bit Counter

Email Required, but never shown. You may object that this will provide LEDs which are on when datasheeh output is low, and off when the outputs are high, which is confusing. I added a 0. Get into the habit now.

4-bit Synchronous Counter with Asynchronous Clear

Sign up using Facebook. So your outputs should be connected like.

So your outputs should be connected like simulate this circuit — Schematic datsheet using CircuitLab You may object that this will provide LEDs which are on when the output is low, and off when the outputs are high, which is confusing. I have added a debounce circuit, but still to avail. Also, have you added a 0.

Sign up or log in Sign up using Google. It’s always the simple things.

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