ElectronicsThe CH375B is a USB interface integrated circuit (IC) manufactured by Qin Heng Electronics. It is a 3.3V, 5V, 12Mbps, 28-pin, 300mil small outline integrated circuit (SOIC) package and is compliant with the RoHS Directive (Restriction of Hazardous Substances). The CH375B is a highly integrated USB communication controller for transferring data to and from USB compatible devices. It supports all popular USB data transfer types such as Control, Interrupt, Bulk and Isochronous. It is designed to process up to 5 requests concurrently. The CH375B also features integrated embedded USB DFU (Device Firmware Updating) so that the user never needs to 'break open' his device to upgrade the firmware.