NXP Semiconductors.

8-bit microcontroller with accelerated two-clock 80C51 core, 4 kB/8 kB wide-voltage byte-erasable flash with 10-bit ADC

Philips Electronics

Single-chip 8-bit microcontroller

Philips Electronics

8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM

Philips Electronics

8-bit microcontrollers with accelerated two-clock 80C51 core 4 kB/8 kB 3 V low-power Flash with 8-bit A/D converter

Philips Electronics

8-bit microcontroller with accelerated two-clock 80C51 core 4 kB/8 kB/16 kB 3 V byte-erasable flash with 8-bit ADCs

Philips Electronics

8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM

NXP Semiconductors.

8-bit 80C51 5 V low power 16/32/64 kB flash microcontroller with 1 kB RAM

Philips Electronics

80C51 8-bit microcontroller family with extended memory; 96 kB Flash with 2 kB RAM

Philips Electronics

8-bit microcontrollers with accelerated two-clock 80C51 core 2 kB 3 V Flash with 8-bit A/D converter

Philips Electronics

8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM

Philips Electronics

8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM

NXP Semiconductors.

8-bit microcontrollers with two-clock 80C51 core, 1 kB 3 V flash with 128-byte RAM

NXP Semiconductors.

8-bit microcontroller with accelerated two-clock 80C51 core 4 kB/8 kB/16 kB 3 V byte-erasable flash with 8-bit ADCs

Philips Electronics

8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM