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.
|Country:||Sao Tome and Principe|
|Published (Last):||8 December 2015|
|PDF File Size:||18.63 Mb|
|ePub File Size:||20.82 Mb|
|Price:||Free* [*Free Regsitration Required]|
It’s always the simple things.
Fairchild Semiconductor – datasheet pdf
I switched the LEDs around and connected their input to 5V and their ground to the output pins.
N 4-bit counter not counting properly – Electrical Engineering Stack Exchange
Sign up using Facebook. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs.
Finally, you should not count on TTL outputs driving high, as you have shown. Sign up or log in Sign up using Google.
In that case, invert the signals going to your LEDs. So your outputs should be connected like.
(PDF) 74161 Datasheet download
Without this buffering, your switch should not work on a button push, only on a release. Also, have you added a 0. Since you already need one section of aand there are 6 gates per IC, you simply go.
WhatRoughBeast 49k 2 28 Post as a guest Name. Home Questions Tags Users Unanswered. TTL works much better pulling loads down. I’d reduce that down to something in the nF to 1uF range. So your outputs should be connected like sata 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.
Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. 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. You can often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms.