Alldatasheet - Free datasheet archive and search for electronic components and semiconductors.
Allegro Technical Publications - Technical publications and application notes on step motor drive technology, power conversion and semiconductors.
AllPinouts - A Wiki-based archive of connectors and cables pinouts.
Analog Applications Journal - Analog application journal by Texas Instruments. Articles on data acquisition, power management, amplifiers.
Application Notes - Application notes from Maxim: A/D and D/A, audio, measurement and other circuits.
Application Notes from Rohde and Schwarz - Alphabetical and search lookup for application notes on radiocommunications, broadcasting, test, measurements, and more.
Avtech Applications Information - Application notes and technical briefs on pulse generators, laser diode drivers, function generators, and amplifiers.
Cable Basics - Short-form guides on various cable types.
Data Sheet Pdf Search Engine - Data sheet search engine. Searches pdf data sheet files and also lists the component images.
Datasheet123 - Free vertical datasheet search engine for electronic components and semiconductors.
Datasheet Archive - Provides searchable database of electronic component datasheets and data books. Allows browsing and includes photographs.
Datasheet Directory - Free database and search for electronic and semiconductor component data sheets. Includes pinouts and application circuits.
DataSheetPro.com - Free database and search for electronic and semiconductor component data sheets.
Electronic Engineers Master - An online edition of EEM- catalog of electronic components, equipment and services with links to the manufacturers as well as reference designs and application materials. Requires registration.
Electronics-OEM - A listing of electronics companies, semiconductors, chips, discretes, passives and actice componenets.
Embedded Cookbook - A community for electronic developers and the tools to share information about electronic parts. A list of available datasheets and a forum.
Fairchild Semiconductor Application Notes - Application notes and other documents on analog, mixed signal, interface, logic and other ICs, as well as discrete semiconductors.
Fluke Application Notes - Application Notes from Fluke on electronic, electrical, predictive maintenance and biomedical measurements.
Free Datasheets - Text based datasheet searches. Files are saved as their part numbers.
Global Electronic Components Datasheet Locator - A free electronic engineering tool that will enable the user to locate product datasheets from hundreds of electronic component manufacturers worldwide.
GlobalSpec Datasheet Directory - Directory and search of data sheets on electronics components and other technical products; index of component manufacturers.
IC Master - Electronic components search, datasheets, inventory levels of distributors and side-by-side part comparisons. Requires registration (free).
Intel MCS 51-251 Microcontrollers - Intel's 8-bit MCS® 51 family of microcontrollers development site. Technical documents, support, FAQ.
Jaycar Electronics Primers - Data, information pages and application notes on using batteries and other electronic components.
Manufacturers of Support Components - A list of manufacturers of various types of electronics components compiled by Maxim. Manufacturers will sell in small quantities to experimenters.