The STC15F104W-35I-SOP is an 8-pin, 150 mil SOIC RoHS-compliant surface mount integrated circuit (IC) manufactured by STC. It is a type of flash microcontroller based on the single-chip 8051 microcontroller design. This chip contains a powerful 8051 compatible 8 bit CPU, 4 Kbytes of on-chip program memory (1 Kbyte of on-chip ROM and 3 Kbyte of flash ROM), 1 Kbyte of RAM, and a Serial Peripheral Interface (SPI). It has a maximum clock frequency of 24 MHz, with an operating voltage from 2.7 V to 5.5 V. Additionally, it includes many standard features, such as Watchdog Timer, Brown-Out Detection, Timers, and PWM. This IC is suitable for applications such as office equipment, motors, remote control, home automation, data acquisition, audio processing, and more.