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

CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

Philips Electronics

80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage 2.7 to 5.5 V/ low power/ high speed 30/33 MHz

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)

Philips Electronics

8-bit microcontrollers

Philips Electronics

80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless low voltage (2.7V–5.5V), low power, high speed (33 MHz)

Temic Semiconductors

CMOS 0 to 44 MHz Single Chip 8–bit Microntroller

Philips Electronics

CMOS single-chip 8-bit microcontrollers

Philips Electronics

CMOS single-chip 8-bit microcontrollers

Philips Electronics

CMOS single-chip 8-bit microcontroller with on-chip EEPROM

Philips Electronics

80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz)

Philips Electronics

CMOS single-chip 8-bit microcontrollers

NXP Semiconductors.

80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage (2.7 to 5.5 V), low power, high speed (30/33 MHz)

Philips Electronics

80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage 2.7 to 5.5 V/ low power/ high speed 30/33 MHz