The HT42B534-1 with QFN-16-EP(4x4) is an USB IC produced by Holtek. Its tiny 4x4mm QFN package makes it suitable for a variety of applications such as mobile phones, tablets, smart TVs, etc. It has power and data transfer capability and is compliant with the USB 2.0 specification. It is designed for use in low power applications. It is RoHS compliant and has a maximum operating voltage of 4.5V. The IC includes 4 power switches for controlling power devices, 1 USB host port, 1 USB charger port, and a CAN bus interface. It also features a clock generator, a 3-channel DMA controller, and a universal serial bus interface. The IC is also capable of supporting up to 8 external USB devices.