SMSC USB2504/USB2504A is an integrated USB2.0 compatible 4-port hub with features including high-speed, full-speed, and low-speed compatibility, full power management, automatic detection of bus power/self-power source, etc.
The SMSC USB2504/USB2504A is a fully USB‑2.0‑compliant 4‑port hub offering four dedicated Transaction Translators for maximum throughput. It supports High‑Speed (480 Mbit/s), Full‑Speed (12 Mbit/s) and Low‑Speed (1.5 Mbit/s) devices, with selectable power management per port or ganged, and can operate as self‑powered, bus‑powered or dynamic‑powered.
The hub integrates all required termination and pull‑up/pull‑down resistors, includes internal short‑circuit protection, and provides optional LED indicators. It is available in 64‑pin TQFP and 56‑pin QFN packages, with detailed mechanical dimensions and lead specifications provided in the datasheet.
| Number of ports | 4 |
|---|---|
| Transaction Translators | 4 (one per downstream port) |
| Supported USB speeds | High‑Speed 480 Mbit/s, Full‑Speed 12 Mbit/s, Low‑Speed 1.5 Mbit/s |
| Power management | Per‑port or ganged selectable power control; self‑powered, bus‑powered, dynamic‑powered modes |
| Internal PLL | 480 MHz sampling clock |
| Core voltage regulator | 1.8 V linear regulator |
| I/O voltage | 3.3 V I/O with 5 V input tolerance |
| Package options | 64‑Pin TQFP or 56‑Pin QFN |
| Overall package height (TQFP) | 1.60 mm |
| Lead pitch (TQFP) | 0.50 mm |
The hub provides four Transaction Translators, one for each downstream port.
It can operate as a self‑powered, bus‑powered, or dynamic‑powered hub, with selectable per‑port or ganged power control.
The hub supports High‑Speed (480 Mbit/s), Full‑Speed (12 Mbit/s) and Low‑Speed (1.5 Mbit/s) devices.
The device is offered in a 64‑pin TQFP package and a 56‑pin QFN package.