NXP Semiconductors.
80C51 8-bit microcontroller family 8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V), low power, high speed (33 MHz)
Advanced Micro Devices
CMOS SINGLE CHIP MICROCONTROLLER
Philips Electronics
Low-voltage single-chip 8-bit microcontrollers
Intel
UNIVERSAL COMMUNICATION CONTROLLER 8-BIT MICROCONTROLLER
NXP Semiconductors.
80C51 8-bit microcontroller family 8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V), low power, high speed (33 MHz)
Intel
HIGH-PERFORMANCE CHMOS MICROCONTROLLER
Philips Electronics
Low-voltage single-chip 8-bit microcontrollers