The CH374S is an SOP-28_300mil RoHS compliant USB IC manufactured by Qin Heng. It is a low power, low cost, low voltage, and low frequency IC that converts USB signals to a Serial Peripheral Interface (SPI) or I2C/UART compatible signals. It is compatible with Windows, Linux, and MacOS. The CH374S supports all types of USB protocol transfers, including control, interrupt, Bulk and Isochronous transfers. It also supports USB full-speed (12 Mb/s) and low-speed (1.5 Mb/s) operations. It is ideal for applications that require transferring data between a PC and other host devices and peripherals in a highly efficient and cost-effective manner.