The RH7901 is a small USB IC designed and manufactured by the Ronghe Company. It is a 5 pin SOT-23 package that is RoHS compliant. The RH7901 is designed as a low-speed peripheral or an interconnect device. It has advanced power management features and supports both low-speed and full-speed communications. The RH7901 can also be used as a USB port expander due to its ability to support up to 8 downstream ports. The IC also offers ESD protection and voltage surge protection, making it highly reliable. It can work in temperatures ranging from -40? to 125? and is designed for applications such as industrial control, wireless communication, automotive electronics, and consumer electronics.