The STC15W204S-35I-SOP16 is a Microcontroller Unit (MCU/MPU/SOC) manufactured by STC with a 4KB 256Byte FLASH 14 51Series SOIC-16 package. It is RoHS compliant and belongs to STC's 51Series. It provides multiple functions such as an enhanced 8051 CPU core (24MHz Maximum frequency), Internal Oscillator, UART, I2C bus, SPI bus, ADC/DAC, PWM, timers, and interrupt controller. It is suitable for power-critical control applications. It provides fast response, low power consumption, and high reliability in an industry compliant pinout.