Where have those companies gone?
When working with modern electronics - particularly digital ICs such as the '51 microcontrollers are - I often search for information on parts in various older devices. Companies that produce these chips have the unfortunate habit of buying, selling, merging, spinning-off and renaming themselves regularly, so it is sometimes a real pain to find relevant information on an older part.
The presented diagram depicts the fate of following "disappeared" companies, or their semiconductor branch, or their particular line of products (in no particular order and far from being complete or even accurate):
Hewlett-Packard (HP), Agilent, Hyundai, Signetics, MHS (Matra), Telefunken, Temic, Burr-Brown, Motorola, Intel, Chips and Technologies, Unitrode, Benchmarq, Chipcon, Tesla, Lumileds, Siemens, MMI, Vantis, Crystal Semiconductor, Brooktree, Rockwell, Waferscale Integration (WSI), Thomson SA, Triscend, Mitel, Cygnal, Cyrix, IDT, Sprague, Harris, Philips, ISD, NextFlash, TDK Semiconductor, NetMos, Scenix, Ambient Technologies, ATI, Alliance Semiconductor, Infineon, Xicor, Winbond, Simtek, Catalyst, AMIS, NanoAmp, Atmel, Sipex, Luminary, Numonyx, NEC, Teridian, Oxford Semiconductor, SST, Qimonda, Asiliant, Actel, Zarlink, National Semiconductor (NS), SMSC, Elpida, MosChip, Fujitsu, Supertex, Micronas, Trident, Epcos, PLX, IRF, Sigmatel, Sanyo, Freescale, Fairchild, Synergy Semiconductor, Kendin, Micrel, Altera, Energy Micro, Wolfson, International Rectifier, ZMD(ZMDI), Spansion, NXP, OKI, Zilog, IXYS, Avago, TAOS, Conexant, Intersil, Linear, CSR, Ubicom, EXAR.
NEW Now also in searchable pdf.
Last changed: 26/Sep/2017 - wek at efton dot sk