74161 COUNTER DATA SHEET PDF
74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counters. These synchronous, presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs. The DM74LSA and. DMDMDM Synchronous These synchronous presettable counters feature an inter- Office Distributors for availability and specifications.
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Since you already need one section of aand there are 6 gates per IC, you simply go. Finally, you should not count on TTL outputs driving high, as you have shown. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs.
Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. I’m still getting the same effect.
4-bit Synchronous Counter with Asynchronous Clear
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.
(PDF) 74161 Datasheet download
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. Oh, Ill change that and see shwet happens.
You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.
WhatRoughBeast 49k 2 28 I’d reduce that down to something in the nF to 1uF range. I added a 0. I switched the LEDs around and connected their input to 5V and their ground to the output pins. Whenever I press the clock button I get all of the leds on except 7461 one or two, with some flashing during the button press. That’s probably causing as much trouble as no debounce was.
Sign up using Email and Password. Get into the habit now. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. Post as a guest Name. Email Required, but never shown.
74LS Datasheet pdf – Synchronous 4-Bit Binary Counters – Fairchild Semiconductor
So your outputs should be connected like. For breadboards, use a cap for each IC. Then I used a pullup resistor for the clear switch. TTL works much better pulling loads down. Sign up using Facebook.