The TSC80C31/80C51 is a high performance SCMOS version of the 8051 NMOS single chip 8 bit µC. It retains all the features of the 8051, and has two software-selectable modes of reduced activity for further reduction in power consumption. The TSC80C31/80C51 is manufactured using SCMOS process which allows them to run from 0 up to 44 MHz with VCC = 5 V. The TSC80C31/80C51 is also available at 20 MHz with 2.7 V < Vcc < 5.5 V.
The TSC80C31/80C51 is a CMOS 0‑44 MHz single‑chip 8‑bit microcontroller compatible with the classic 8051 architecture. It offers 4 KB ROM, 128 B RAM, 32 programmable I/O lines, two 16‑bit timers, and a full‑duplex serial port, with optional low‑power and security features.
The document provides pin configurations, functional block diagrams, power‑control modes (Idle and Power‑Down), oscillator details, and ordering information, including package types and temperature ranges for commercial, industrial, automotive, and military applications.
| ROM size | 4 KB |
|---|---|
| RAM size | 128 bytes |
| I/O lines | 32 programmable |
| Timers | Two 16‑bit timer/counter |
| Program memory space | 64 KB |
| Data memory space | 64 KB |
| Supply voltage | 2.7‑5.5 V |
| Frequency range | 0‑44 MHz |
| Temperature range | Commercial, industrial, automotive, military |
The low‑power L16 version operates at 2.7‑5.5 V with a frequency range of 0‑16 MHz, and the L20 version operates at the same voltage range with 0‑20 MHz.