The STC8G1K12-38I-QFN20 with STC QFN20 RoHS is an integrated circuit manufactured by STC. It is part of the EFM8G series of 8-bit microcontrollers. It is based on the 8051 core with 8 kB Flash memory, 4 kB RAM and an integrated 8-bit timer/counter unit. Additional features include up to four 16-bit timers, I2C, SPI, UART, and a full-speed USB interface. The STC8G1K12-38I-QFN20 is packaged in a 20-pin Quad-Flat No-Lead (QFN20) package and operates from a 2.7 - 3.6 V power supply. It is compliant with the RoHS directive.