Fairchild Semiconductor
Texas Instruments
LSI Corporation
Altera
Atmel
Cypress Semiconductor
Intel
Maxim Integrated
Microchip Technology
Marvell Technology
onsemi
Cyrix
Zilog
Applied Materials
American company
nationalsemiconductor.com
National Semiconductor was an American semiconductor manufacturer which specialized in analog devices and subsystems, formerly with headquarters in Santa Clara, California. Wikipedia