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)

NXP Semiconductors.

80C51 8-bit microcontroller family with extended memory

Intel

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS

Philips Electronics

Low power, low price, low pin count (14 pin) microcontroller with 1 kbyte OTP

Philips Electronics

80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP, 512B/512B/512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz)

Intel

HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Intel

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLERS

Philips Electronics

80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP, 512B/512B/512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz)

Intel

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

Philips Electronics

Low power, low price, low pin count (16 pin) microcontroller with 2 kbyte OTP

Rochester Electronics

POWERFUL MICROCONTROLLER from the MCS® 51 controller family

Philips Electronics

80C51 8-bit microcontroller family 8KB/16KB/32KB/64KB OTP, 512B/512B/512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz)

Intel

HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Intel

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER