The SL2.2s USB ICs ROHS are manufactured by CoreChips. They are highly integrated, ultra-low power, USB, 2.1-compatible, universal serial bus controller. It is capable of providing data transfer rates up to 4 Mbps. It is interfaced with the standard USB pins, making it suitable for a variety of USB device applications. It supports full and low-speed four-wire differential bus access and can support over-current protection and extends normal operating voltage range for improved system reliability. The device is compliant with the RoHS directive which ensures it does not contain hazardous materials. It also has an 8-bit timer, wake-up capability and up to eight user-configurable GPIO pins for a wide range of system control applications.