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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Oh, Ill change that and see what happens.
Fairchild Semiconductor – datasheet pdf
Also, have you added a 0. 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 dxtasheet using Google. WhatRoughBeast 49k 2 28 Then I used a pullup resistor for the clear switch. 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. So your outputs should be connected like. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit.
TTL works much better pulling loads down. Finally, you should not count on TTL outputs driving high, as you have shown. I have added a debounce circuit, but still to avail.
I switched the Datasheett around and connected their input to 5V and their ground to the output pins.
Datasheet PDF –
Okay I wired 7,9, and 10 together and then datasheft them to a 1K resistor to 5V. Sign up using Email and Password. Post as a guest Name. Since you already need one section of aand there are 6 gates per IC, you simply go. Without this buffering, your switch should not work on a button push, only on a release.
It’s always the simple things. Home Questions Tags Users Unanswered.
You may object that this will provide LEDs which are on datwsheet the output is low, and off when the outputs are high, which is confusing. Get into the habit now. I added a 0. As further issues arise I see myself stuck once more with a dysfunctional circuit.
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 dataxheet.