The SC91F72BD20U is a 4kB 128 Byte FLASH 18 51Series DIP-20 Microcontroller Unit (MCU, MPU or SOC) ROHS manufactured by SinOne. It is a single-chip controller optimized for applications that have to be controlled by a low-cost low-power microcontroller. It supports various on-chip modules such as EEPROM, A/D converter, powermanagement unit, integrated oscillator and clock circuit, and CMOS interrupts to support a wide range of applications. It also has an enhanced CPU core and instructions for improved code execution speed. It is suitable for energy control and management, instrumentation control, consumer electronics, and smart health/care products.