This datasheet introduces Philips Semiconductors' 8XC54/58 8XC51FA/FB/FC/80C51FA 8XC51RA+/RB+/RC+/RD+/80C51RA+ 80C51 8-bit microcontroller family 8K–64K/256–1K OTP/ROM/ROMless, low voltage (2.7V–5.5V), low power, high speed (33 MHz) features.
The 8XC54/58, 8XC51FA/FB/FC/80C51FA and 8XC51RA+/RB+/RC+/RD+/80C51RA+ families are low‑voltage (2.7 V‑5.5 V), low‑power, high‑speed (up to 33 MHz) 8‑bit microcontrollers built in an advanced CMOS process. They share the same 80C51 instruction set and add features such as PWM, high‑speed I/O, and enhanced UART for a wide range of control applications.
The datasheet provides detailed pin descriptions, package options (DIP, PLCC, QFP), memory configurations (8K‑64K ROM, 256‑byte OTP, 1K ROM‑less), and ordering information. It also lists functional blocks, security bits, and electrical characteristics needed for design and verification.
| Operating voltage range | 2.7 V to 5.5 V @ 16 MHz |
|---|---|
| Maximum clock speed | 33 MHz |
| Memory options | 8K‑64K ROM, 256‑byte OTP, 1K ROM‑less |
| I/O ports | Four 8‑bit bidirectional ports |
| Interrupt priority levels | Four‑level priority interrupt |
The devices operate from 2.7 V to 5.5 V (typical at 16 MHz).
Each device provides four 8‑bit bidirectional I/O ports.
The microcontrollers can run up to 33 MHz.
The devices include two ROM security bits and eight OTP‑EPROM security bits.