General description
The ISP1520 is a stand-alone Universal Serial Bus (USB) hub controller IC that complies with Universal Serial Bus Specification Rev. 2.0. It supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s).
The upstream facing port can be connected to a Hi-Speed USB host or hub or to an Original USB host or hub. If the upstream facing port is connected to a Hi-Speed USB host or hub, then the ISP1520 will operate as a Hi-Speed USB hub. That is, it will support high-speed, full-speed and low-speed devices connected to its downstream facing ports. If the upstream facing port is connected to an Original USB host or hub, then the ISP1520 will operate as an Original USB hub. That is, high-speed devices that are connected to its downstream facing ports will operate in full-speed mode instead.

FEATUREs
■ Complies with:
   ◆ Universal Serial Bus Specification Rev. 2.0
   ◆ Advanced Configuration and Power Interface (ACPI™), OnNow™ and USB power management requirements.
■ Supports data transfer at high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s)
■ Self-powered capability
■ USB suspend mode support
■ Configurable number of ports
■ Internal power-on reset and low voltage reset circuit
■ Port status indicators
■ Integrates high performance USB interface device with hub handler, Philips Serial Interface Engine (SIE) and transceivers
■ Built-in overcurrent detection circuit
■ Individual or ganged power switching, individual or global overcurrent protection, and non-removable port support by I/O pins configuration
■ Simple I2C-bus (master/slave) interface to read device descriptor parameters, language ID, manufacturer ID, product ID, serial number ID and string descriptors from a dedicated external EEPROM, or to allow the microcontroller to set up hub descriptors
■ Visual USB traffic monitoring (GoodLink™) for the upstream facing port
■ Uses 12 MHz crystal oscillator with on-chip Phase-Locked Loop (PLL) for low ElectroMagnetic Interference (EMI)
■ Full industrial operating temperature range from 0 °C to 70 °C
■ Available in LQFP64 package.

APPLICATIONs
■ Monitor hubs
■ Docking stations for notebooks
■ Internal hub for USB motherboards
■ Hub for extending Easy PCs
■ Hub boxes.