74LS Synchronous 4-bit Binary Counters. These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed. 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.

Author: Faejas Yojar
Country: Jordan
Language: English (Spanish)
Genre: Travel
Published (Last): 23 September 2009
Pages: 267
PDF File Size: 2.15 Mb
ePub File Size: 5.22 Mb
ISBN: 689-1-19540-926-9
Downloads: 2203
Price: Free* [*Free Regsitration Required]
Uploader: Akinozahn

Fairchild Semiconductor – datasheet pdf

Then I used a pullup resistor for the clear switch. Since you already need one section of aand there are 6 gates per IC, you simply go simulate this circuit. Sign up or log in Sign up using Google. Oh, Ill change that cojnter see what happens. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Email Required, but never shown.

Sign up using Facebook. Whenever I press the clock button I get all of the dataheet on except maybe one or two, with some flashing during the button press.

  DVR BZ250 PDF

Okay I wired 7,9, and 10 together and then connected them to a 1K resistor to 5V. I’d reduce that down to something in the nF to 1uF range. For a circuit board with a ground plane, the usual guideline is at least one cap per 5 ICs.

Fairchild Semiconductor

Home Questions Tags Users Unanswered. As further issues arise Daatsheet see myself stuck once more with a dysfunctional circuit. WhatRoughBeast 49k 2 28 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. By using our site, you acknowledge that you have read and understand our Cookie Policy cointer, Privacy Policyand our Terms of Service.

4-bit Synchronous Counter with Asynchronous Clear

Get into the habit now. You ccounter often get away with less, but as you’ve just learned, insufficient decoupling can have weird symptoms. I added a 0. Also, have you added a 0. Without this buffering, your switch should not work on a button push, only on a release.

TTL works much better pulling loads down. I have added a debounce circuit, but still to avail. Sign up using Email and Password.

It’s always the simple things. So your outputs should be connected like. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your datazheet use of the website is subject to these policies.

  DAVID ALBAHARI MAMAC PDF

I switched the LEDs around and connected their input to 5V and their ground to the output pins.

I’m still getting the same effect. In that case, invert the signals going to your LEDs. Post as a guest Name. So your datasueet 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. For breadboards, use a cap for each IC.

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. That’s probably causing as much trouble as no debounce was.