U
- Ubicom - formerly Scenix
- 635 Clyde Avenue, Mountain View, CA 94043 - 650/210-1500 - FAX 650/210-8715
- UDT Sensors Inc.
- 12525 Chadron Avenue, Hawthorne, CA 90250 - 310/978-0516 - FAX 310/644-1427
- UICC
- No. 8, Li-Hsin Road 3, Science-Based Industrial Park, Hsin-Chu, Taiwan, R.O.C. - 886-3-4797966 - FAX 886-3-5797967
- Ulm Photonics GmbH
- Lise-Meitner Strasse 13, D-89081 Ulm, Gemany - +49(0)731-550194-014 - FAX +49(0)731-550194-026
- UltraChip Inc.
- 1600 Wyatt Drive, Suite 1, Santa Clara, CA 95054 - FAX 408/855-8887
- 3F, No. 70, ChowTze Street, Nwi Hu, Taipei, Taiwan, R.O.C. - +8797-8947 - FAX +8797-8910
- UltraRF
- 160 Gibraltar Court, Sunnyvale, CA 94089 - 877/206-5657 - FAX 408/541-0139
- Ultra Technology
- 2512 Tenth Street, Berkeley, CA 94710 - 510/848-2149
- UMC
(United Microelectronics Company)
- 13 Innovation First Road, Science Based Industrial Park, Hsinchu, Taiwan, R.O.C. - +886-3-578-2258 - FAX +886-3-577-4767
- Uniphase - see JDS Uniphase
- Unisem Semiconductors
- 34A Mauchly, Irvine, CA 92618 - 949/453-1008 - FAX 949/453-8748
- United Monolithic Semiconductors
S.A.S. (UMS)
- Route Départementale 128-BP 46, 91401 Orsay Cedex, France - +33 1 69 33 03 08 - FAX +33 1 69 33 03 09
- United Semiconductor Corp.
- No. 3, Li-Hsin Road 2, Scence Based Industrail Park, Hsin-Chu, Taiwan, R.O.C. - 886-3-5795158 - FAX 886-3-5795168
- Unitrode - acquired by Texas Instruments
- 7 Continental Blvd., Merrimack, NH 03054 - 603/424-2410 - FAX 603/424-3460
- USAR Systems
- 568 Broadway, New York, NY 10012 - 212/226-2042 - FAX 212/226-3215
- US Digital Corporation
- 11100 NE 34th Street, Vancouver, WA 98682 - 360/260-2468 - FAX 360/260-2469
- US Microwaves
- 2966 Scott Blvd., Santa Clara, CA 95054 - 408/986-8026 - FAX 408/986-8027
- USMikroChips, Inc.
15 Sutton Road, Webster, MA 01570 - 978/943-9430 - FAX 978/943-0487
- UTMC Microelectronics Center a division of Aeroflex
- 4350 Centennial Blvd., Colorado Springs, CO 80907 - 719/594-8000
- Utron Technology, Inc.
- 1F, No. 11, R&D 2nd Road, Science-Based Industrial Park, Hsin-Chu, Taiwan R.O.C. - 886-3-5777882 - FAX 886-3-5777919