Philips 80C51/87C51/80C52/87C52 80C51 8-bit microcontroller family 4 K/8 K OTP/ROM low voltage (2.7 V–5.5 V), low power, high speed (33 MHz), 128/256 B RAM Product specification
The 80C51/87C51/80C52/87C52 family is a high‑performance static 8051‑compatible microcontroller fabricated in Philips high‑density CMOS technology. It operates from 2.7 V to 5.5 V and offers low‑power modes, including idle and power‑down, with a maximum clock speed of 33 MHz.
The devices provide 4 KB or 8 KB OTP/ROM, 128 B or 256 B RAM, four 8‑bit I/O ports, three 16‑bit counter/timers, six interrupt sources, and a full‑duplex UART. Detailed pin descriptions, package options, and ordering information are included.
| Operating voltage | 2.7 V to 5.5 V |
|---|---|
| Maximum clock frequency | 33 MHz |
| ROM size | 4 KB (80C51) or 8 KB (80C52) |
| RAM size | 128 B (80C51) or 256 B (80C52) |
| I/O ports | Four 8‑bit ports |
| Counter/Timers | Three 16‑bit counters/timers |
| Interrupt sources | Six |
| UART | Full‑duplex |
| Power‑saving modes | Idle mode, Power‑down mode |
It operates from 2.7 V to 5.5 V.
The devices can run up to 33 MHz.
There are four 8‑bit I/O ports.
The microcontroller offers idle mode and power‑down mode.