The TUSB2046B is a 3.3V CMOS hub device that provides a full-speed hub function compliant with the USB specification, with an optional serial EEPROM interface. It has various features, such as full compliance with the USB specification, integrated USB transceivers, state machine implementation without firmware programming, one upstream port and four downstream ports, support for full-speed and low-speed operations, etc.
The TUSB2046B and TUSB2046BI are 3.3‑V low‑power ASIC USB hubs that offer one upstream port and four downstream ports. They operate as full‑speed hubs, support both bus‑powered and self‑powered modes, and include programmable vendor and product IDs via an optional external EEPROM.
The document details absolute‑maximum ratings, recommended operating conditions, pin‑out functions, and electrical characteristics such as supply voltage range (0.5‑3.6 V), input/output voltage thresholds, and current limits. Application notes describe clock configurations, power‑management options, and typical mechanical dimensions.
| High‑level input voltage (TTL/LVCMOS) | 2 V |
|---|---|
| Maximum output current (high‑level) | -4 mA |
It supports two power source modes: self‑powered and bus‑powered.
The hub provides four downstream ports.