The STC12C5A16S2-35I is an 8-bit microcontroller with an integrated, low-power, CMOS (HMOS) core manufactured by STC. It has built-in 4KB (2K x 16-bits) Flash ROM, 512 bytes of RAM, an embedded hardware multiplier, an enhanced UART, I2C bus support, and up to 8 programmable I/O ports. The chip is packaged in a low power quad flatpack (LQFP) 44-pin package with 10 x 10 x 0.8mm dimensions. The package is RoHS compliant, which means it is free of hazardous substances.