The STC90C54RD+40I-LQFP44 is an integrated circuit manufactured by STC Semiconductor. It is a low power, single chip 8-bit microcontroller with 4k x 14 words of program memory, 256 bytes of RAM, 4K x 16 bytes of EEPROM, and 13 general purpose I/O lines. It also contains two 16 bit timer/counters, UART control, and two external interrupts. The IC is packaged in an LQFP-44_10x10x08P RoHS package. This type of package provides higher density compared to regular packages and is RoHS compliant. The STC90C54RD+40I-LQFP44 is ideal for applications such as industrial process control, motor speed control, intelligent instruments, automotive, and lighting control.