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×ÊÁÏ²éÑ¯ÍøÕ¾£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.
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.
74LS Synchronous 4-Bit Counter Buy Online in India – Robomart
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.