SN8F5721 is an 8-bit architecture microcontroller which compatible with MCS-51 instruction set. It runs at up to 12.1 times faster than the original 8051 at the same frequency. Meanwhile, its advanced semiconductor technology provides a wide range operation voltage, from 1.8 V to 5.5 V, and working temperature between -40°C and 85°C at 8 MHz CPU clock rate.

The microcontroller builds in a 4 KB flash memory (IROM) and 256 bytes internal RAM (IRAM). Furthermore, a 12 input channels/12-bit resolution ADC, 2-set PWM generators, interfaces (SPI, UART, I2C) and 16-bit timers were designed to fit in the vast majority of consumer electronics, home automation and capacitive touch applications.