- AboutSemi - Free vertical datasheet search engine for electronic components and semiconductors.
- 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.
- Catalog of Electronic Components - Industry-wide database of electronic components, with datasheets, parameters and search capability.
- CR2032 Datasheet and Information - A collection of CR2032 battery datasheets from various manufacturers and design articles.
- Datasheet Archive - Provides searchable database of electronic component datasheets and data books. Allows browsing and includes photographs.
- DataSheet Catalog - Datasheet catalog for electronic components, ICs, and other semiconductors.
- Datasheet Directory - Free database and search for electronic and semiconductor component data sheets. Includes pinouts and application circuits.
- Datasheet Search Engine - Electronic component datasheet search engine. Provides parts datasheets, price, RoHS, cross reference.
- Datasheet Zone - Semiconductor datasheet, IC pinouts and application circuits.
- DataSheet4U - Free datasheet archive and search.
- DataSheetPro.com - Free database and search for electronic and semiconductor component data sheets.
- Datasheets and Projects - A catalog with datasheets, specifications, circuit schematics, and DIY projects.
- DataSheets.com - Electronic parts datasheets, Inventory and parametric information. Requires free registration.
- 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 Communication Devices - RS-485 communication application notes.
- Electronics-OEM - A listing of electronics companies, semiconductors, chips, discretes, passives and actice components.
- Embedded Cookbook - A community for electronic developers and the tools to share information about electronic parts. A list of available datasheets and a forum.
- Everything RF - A parametric search engine for RF and microwave components including amplifiers, antennas, filters, connectors, isolators, switches and transceivers.
- 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 - Notes on electronic, electrical, predictive maintenance and biomedical measurements.
- Free Datasheets - Text based datasheet searches. Files are saved as their part numbers.
- GE Digital Energy - Application and papers on digital power systems and communications.
- 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 Datasheet - Datasheets search and download: amplifiers, processors, transistors, integrated circuit and other semiconductor components.
- IC Master - Electronic components search, datasheets, inventory levels of distributors and side-by-side part comparisons. Requires registration (free).
- Intel Microcontrollers - Provides information on 8-bit MCS 51 and MCS 96 families of microcontrollers, now discontinued by Intel. Technical documents, support, FAQ.
- Jaycar Electronics Primers - Data, information pages and application notes on using batteries and other electronic components.
- JTAG Cables - Compact JTAG reference - Boundary scan, interfaces, cables, pinouts, programmers and software.
- LCD, IC and Component Datasheets - Datasheets of LCD, IC and other electronic components.
- Magnetics Datasheets - Datasheet of ferrites, powder cores and strip wpund cores.
- Micro Electronics Ltd- Datasheets - Transistors, displays, LEDs, Voltage regulators and other.
- Microcontroller Tutorials & Applications - Microcontroller interfacing tutorials and data sheets download.
- Microsemi Co - Mostly discrete semiconductors application notes.
- National Semiconductor Application Notes - National Semiconductor application notes: analog, mixed signal, power, and data converters.
- NTE - Semiconductor cross reference search. One of the most extensive cross reference guides on the net.
- okDatasheet - Electronic component and semiconductor datasheet search and download.
- Optima Precision Inc. - Laser Diode Application Notes
- Parallel Port Standard Information - A detailed technical introduction to the IEEE 1284 parallel port.
- Semiconductor Datasheets - An index of manufacturers and data sheets for chips, transistors, and diodes.
- Spread Spectrum Scene Online - A collection of RF related application notes and reference materials.
- SupplyFrame Datasheet and Sources Directory - Free electronic part search: datasheet, cross-references, compliance, sources and inventories.
- Technical Articles AVX Online - Technical articles and application notes on capacitors, ceramic resonators, and other passive components.
- TestMart - Application notes, product tutorials, buying guides, from many test and measurement manufacturers
- TI's Applications Active Matrix - Texas Instruments application notes, block diagrams, application software.
- USB 2.0 Documentation - The original and all subsequent specifications including errata sheets and class documents.
- Zilog - Application Sample Libraries.
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