The STC90C516RD+40I with STC LQFP-44_10x10x08P RoHS is a microcontroller unit (MCU) manufactured by STC Microelectronics. This MCU is based on the 8051-compatible 8-bit microcontroller architecture. It features 4KB of on-chip RAM, 128KB of on-chip code memory (including 32KB Flash/OTP) , 16-bit timer/counters, dual data pointer, full duplex UART, integrated PLL, integrated watchdog timer as well as I2C and SPI interfaces. The STC90C516RD+40I is an industrial grade MCU which is well suited for applications such as industrial automation, home and office automation, motor control and communications. It is available in the standard STC LQFP-44_10x10x08P package which is RoHS compliant.