IC 74161 DATASHEET PDF


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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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You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. WhatRoughBeast 49k 2 28 I have added a debounce circuit, but still to avail.

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

I’m still getting the same effect. So your outputs should be connected like. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Whenever I press the clock button I get all of the leds on except maybe one or two, with some flashing during the button press. 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 datashset use of the website is subject to these policies.

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It’s always the simple things. Get into the habit now. Finally, you should not count on TTL outputs driving high, as you have shown.

Without this buffering, your switch should not work on a button 741611, only on a release. So your outputs should be connected like 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.

Sign up using Facebook. I added a 0. Post as a guest Name. Sign up using Email and Password. Oh, Ill change that and see what happens. For breadboards, use a cap for each IC.

4-bit Synchronous Counter with Asynchronous Clear

Sign up or log in Sign up using Google. That’s probably causing as much trouble as no debounce was. You may object that this will provide LEDs which are on when the output is low, and off when the outputs are high, datasheey is confusing. In that case, invert the signals going to your LEDs. Then I used a pullup resistor for the clear switch.

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74LS Synchronous 4-Bit Counter Buy Online in India – Robomart

Okay I wired 7,9, and 10 together and then connected them to dataxheet 1K resistor to 5V. Also, have you added a 0. Email Required, but never 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.

As further issues arise I see myself stuck once more with a dysfunctional circuit. Home Questions Tags Users Unanswered. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit.

74LS161 Synchronous 4-Bit Counter

TTL works much better pulling loads down. I’d reduce that down to something in the nF to 1uF range. Since you already need datasjeet section of aand there are 6 gates per IC, you simply go. I switched the LEDs around and connected their input to 5V and their ground to the output pins.