STULPI01A STULPI01B is a high-speed USB ULPI transceiver that is fully compliant with USB 2.0 specification and ULPI 1.1 register set. It supports high-speed, full-speed, and low-speed modes of operation and features integrated termination and pull-up/pull-down resistors. The product is suitable for applications such as mobile phones, PDAs, MP3 players, digital cameras, etc.