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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Then I used a pullup resistor for the clear switch. Oh, Ill change that and see what happens. So your outputs should be connected dtasheet simulate this circuit — Schematic created 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.

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(PDF) 74161 Datasheet download

Email Required, but never shown. Since you already need one section of aand there are 6 gates per IC, you simply go. For breadboards, use a cap for each IC.

In that case, invert the signals going to your LEDs. I’d reduce that ratasheet to something in the nF to 1uF range. That’s probably causing as much trouble as no debounce was.

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Post as a guest Name. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. I’m still getting the same effect.

You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. Sign up or log in Sign up using Google. Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. Sign up using Facebook. TTL works satasheet better pulling loads down.

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. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. Also, have you added a 0. Whenever I press the clock button I get all of the leds on except datasyeet one or two, with some flashing during the button press. Sign up using Email and Password. So your outputs should be datasbeet like.

I added a 0.

4-bit Synchronous Counter with Asynchronous Clear

As further issues arise I see myself stuck once more with a dysfunctional circuit. WhatRoughBeast 49k 2 28 I have added a debounce circuit, but still to avail. Get into the habit now.

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It’s always the simple things. Finally, you should not count on TTL outputs driving high, datxsheet you have shown. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy oc and cookie policyand that your continued use of the website is subject to these policies.

Without this buffering, your switch should not work on a button push, only on a release.

I switched the LEDs around and connected their input to 5V and their ground to the output pins. 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.

For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs.