These synchronous, presettable counters feature an inter- nal carry look-ahead for application in high-speed counting designs. The DM74LSA and. 74LS datasheet, 74LS pdf, 74LS data sheet, datasheet, data sheet, pdf, Fairchild Semiconductor, Synchronous 4-Bit Binary Counters. The LSA/A/A/A are high-speed 4-bit synchronous count- ers. They are edge-triggered, synchronously presettable, and cascadable. MSI building.
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I’m still getting the same effect. Since you already need one section of adatashet there are 6 gates per IC, you simply go simulate this circuit. Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V.
74LS Datasheet pdf – Synchronous 4-Bit Binary Counters – Fairchild Semiconductor
Email Required, but never shown. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs. I’d reduce that down to something in the nF to 1uF range.
Since you already need one section of aand there are dwtasheet gates per IC, you simply go. Without this buffering, your switch should not work on a button push, datasgeet on a release. 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. So your outputs should be connected like.
74161 Datasheet PDF
As further issues arise I see myself stuck once more with a dysfunctional circuit. TTL works much better pulling loads down. WhatRoughBeast 49k 2 28 I added a 0. For breadboards, use a cap for each IC.
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 datashest high, which is confusing.
You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.
I switched the LEDs around and connected their input to 5V and their ground to the output pins. Sign up using Email and Password.
Oh, Ill change that and see what happens.
Datwsheet I press the clock button I get all of the leds on except maybe one or two, with some flashing during the button press.