80C51FA is a single-chip 8-bit microcontroller manufactured by Philips Semiconductors. It features 8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V), low power, high speed (33 MHz) and other features.
The Philips 8XC51/8XC52/8XC54/8XC58/80C32 series are single‑chip 8‑bit microcontrollers built in an advanced CMOS process. They operate at low voltage (2.7 V – 5.5 V), provide high speed up to 33 MHz, and offer a range of memory options from 8 KB to 64 KB ROM/EPROM, 1 KB OTP/ROMless and up to 1 KB RAM.
Key features include four 8‑bit I/O ports, three 16‑bit timer/counter units, a four‑level priority interrupt system, a full‑duplex enhanced UART, and optional power‑saving modes such as idle and power‑down. Pin‑out diagrams, pin descriptions and package information for DIP, LCC and QFP variants are provided.
The datasheet also lists electrical characteristics, security bits, and application notes, and it contains legal and disclaimer statements from Philips Semiconductors.
| Operating voltage range | 2.7 V – 5.5 V |
|---|---|
| Maximum clock speed | 33 MHz |
| ROM/EPROM size | 8 KB – 64 KB |
| OTP/ROMless option | Available |
| Internal RAM size | Up to 1 KB |
| Number of I/O ports | Four 8‑bit ports |
| Timer/Counter units | Three 16‑bit |
| Interrupt priority levels | Four |
| UART type | Full‑duplex enhanced UART |
They operate from 2.7 V to 5.5 V.
The devices can run up to 33 MHz.
Each microcontroller provides four 8‑bit bidirectional I/O ports.
ROM/EPROM options range from 8 KB to 64 KB, with additional 1 KB OTP/ROMless variants.