Intel 8031 microcontroller family

Intel 8031 and 80C31 are members of Intel MCS-51 family of 8-bit microcontrollers. 8031 / 80C31 have the same integrated peripherals as 8051 MCUs - 4 I/O ports, two 16-bit timers/counters, on-chip oscillator and a serial port. The MCUs have 128 bytes of internal RAM, and, in addition to that, can utilize up to 64 KB of external data memory. The microcontrollers don't have on-chip ROM, and must use external program memory.

Intel 80C31, CMOS version of the 8031 NMOS microcontroller, is fully pin- and object-code compatible with the 8031. The 80C31 offers lower power consumption than the 8031, and adds two low-power modes:

  • idle mode turns off CPU core, but keeps peripherals and RAM active
  • power-down mode turns off CPU core and peripherals, and keeps only RAM memory active.
Use the filter below to display manufacturers that have specific feature(s) incorporated:

List of 8031 manufacturers

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8-bit microcontroller
Frequency (MHz):
8 - 24