(STC Microcontroller).The STC 89C54RD+40I-DIP40 is a 16KB 1.25KB FLASH 35 51Series microcontroller unit (MCU/MPU/SOC) manufactured by STC(STC Microcontroller). It comes in a DIP-40 package and is compliant with the RoHS directive. It has a low power consumption, allowing it to run on very low voltages, making it suitable for battery and mobile applications. The STC 89C54RD+40I-DIP40 features a high speed 16-bit CPU Core, up to 8Kbytes of on-chip ROM, and extensive hardware resources such as eight general-purpose I/O lines, two 16-bit timers/counters, and an enhanced serialCOM port. The MCU is suitable for applications such as automotive, white goods, consumer, industrial, and embedded control systems.