The SM51F20TD1 is a 20-pin DIP RoHS-compliant MCU made by SINOMICON. It is an 8-bit low voltage single-chip microcontroller, built with high-performance underlying architecture. This device is made with high precision technology that delivers excellent performance and system compatibility. The system offers 74486 instructions, fast startup time, low power consumption, and pulse width modulation circuitry. The flash memory has embedded protection, by supporting both hexadecimal and ascii formats. It also features two LCD contrast control pins, four port configurations, five channels of 10-bit A/D converter, and three PWM outputs. It also supports three-level interrupt structure, three user windows, and external interrupt pin. The SM51F20TD1 can be used for applications such as data logging, instrument metering, process control, etc.