TUSB2046BIVFRG4

The TUSB2046BIVFRG4 from Texas Instruments is a 3.3V CMOS hub controller designed for Universal Serial Bus (USB) applications. It is fully compliant with the USB specification as a full-speed hub, offering one upstream port and four downstream ports. All downstream ports support both full-speed and low-speed device operations, automatically adjusting slew rates based on the attached device.

This hub controller features integrated USB transceivers and a state machine implementation that requires no firmware programming. It supports two power source modes: self-powered and bus-powered. Power switching and overcurrent reporting can be configured either ganged or per port. The device operates within a voltage range of 3V to 3.6V and has an operating temperature range of -40°C to 85°C.

The TUSB2046BIVFRG4 is available in a 32-pin LQFP package with a 0.8-mm terminal pitch. It supports suspend and resume operations and can be configured with programmable Vendor ID and Product ID using an external serial EEPROM. The device also includes a 3-state EEPROM interface for EEPROM sharing and push-pull outputs for PWRON, eliminating the need for external pullup resistors. Noise filtering on OVRCUR provides immunity to voltage spikes, and its package pinout allows for a 2-layer PCB. Low EMI emission is achieved by a 6-MHz crystal input, and it supports operation through a 6-MHz crystal input or a 48-MHz input clock.