The STC15W4K16S4-30I-SOP28 is a SOP-28 (300mil) package MCU from STC, which is RoHS-compliant and manufactured with an advanced CMOS technology. It is a high-performance, low-power 8-bit 12T microcontroller designed for portable applications, suitable for low-power consumer applications such as remote control, digital toys, and small household appliances. It has higher programming speed and up to 4K Bytes of on-chip flash program memory. The STC15W4K16S4-30I-SOP28 contains an integrated 16-bit timer / counter, 10-bit ADC, 12-bit PWM, 1-bit comparator, and SPI / I2C serial interface, and the CPU frequency can be up to 30MHZ. It is also an excellent product with power saving features such as Power Save Mode, Low Power Consumption, Dynamic Power Supply and Built-in Sleep Function. It also supports external interrupts with low power elements to ensure better acceleration of systems.