ElectronicsThe CH341F with QFN-28-EP(4x4) USB ICs ROHS is a USB 2.0 controller manufactured by Qin Heng Electronics. The IC is a quad flat no lead (QFN) surface mount package, with a 4mm x 4mm size, and is compliant with the RoHS directive. It features two-channel UARTs, a real-time clock with an alarm function, and two Enhanced Host Controller Interfaces (EHCI) interfaces. The IC is capable of data transfer rates up to 480 Mbps for high speed USB and also supports UHCI USB 1.1 compliant devices. Additionally, it has low power consumption, making it ideal for embedded devices. It also offers local Flash, state machine, DMA, serial ROM with 4KB and 8KB EEPROM and many more features.