74LS21N from Texas Instruments High-Performance Analog. Find the PDF Datasheet, Specifications and Distributor Information. SN54/74LS DUAL 4-INPUT AND GATE. LOW POWER SCHOTTKY. J SUFFIX. CERAMIC. CASE N SUFFIX. PLASTIC. CASE 1. 1. Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise .

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Order Information Free shipping. The notes below mostly apply to both microcontrollers even if the description of the document only satasheet one of them.

Some functions may be missing or not functioning. Mega R3 Arduin None of these sites are particulary easy to use if you don’t know what part you are looking for. Implements a 3-bit up-down Gray code counter with binary outputs and the seven-segment display outputs the message “EE L”. However they are still present in the our stock of parts so if you want to use them you can.

Arduino Pro Mini They are all copyrighted by someone but we’re not going to worry about that. Many figures didn’t survive the translation too well or are missing entirely.

These will be fixed someday, maybe. You can place your order any day and time. These were originally written for the ATmegaA and should run unchanged on that processor.


Many of their files are scans of pages from their printed databooks and the images come out looking pretty bad. How to Make Learning More Fun? They have a large inventory, the prices are reasonable, and we usually get the order pretty quickly.

Datasheets for the newer parts were mostly obtained from the manufacturers or from Jameco and Digi-Key where we order most of our parts. These sample schematics for devices unrelated to the class projects are similar to the types of schematics that should be produced for your project. These parts are not normally used in current EELx projects. If you can’t find a non-scanned copy somewhere else, get it from here.

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74LS21 Dual 4-Input Positive and Gates IC

Their prices on some stuff is very good, provided you can find what you need. Parts in stock – This is a list of most of the parts that the EE class has in stock for project construction.

The administrators are still migrating contents to our new home. It will also get you on their mailing list for future catalogs. We have no experience using the program at this time but it’s probably worth checking out.


IC Datasheet: 74LS21 : Free Download, Borrow, and Streaming : Internet Archive

You can also call us dataheet or send us a message through our Facebook page. Newark and Mouser Electronics – These two are major suppliers to the electronics industry with very large inventories.

Create new account Request new password. For all your product inquiries, send us a message on our Contact Page with the Product Inquiry subject.

Using the serial communications interface on the ATmegaP and MCJL16 microcontrollers – An explanation of the serial port and and how to use it to exchange data with other devices, along with examples of sending and receiving data over the ATmegaP and MCJL16 serial ports.

All Electronics – This is basically a surplus store with both new and used components. This document discusses programming the ATmegaP but much of the information also applies to other ATmega or ATtiny microcontrollers used in the class. Texas Instruments – TI has a large collection of datasheets online, both for current chips and for many obsolete ones.

Some of the following documents are in PDF format. Skip to main content.