USB2503A-HZH

The (USB2503A) SMSC 3-Port Hub is fully compliant with the USB 2.0 Specification and will attach to a USB host as a Full-Speed Hub or as a Full-/High-Speed Hub. The 3-Port Hub supports Low-Speed, Full-Speed, and High-Speed (if operating as a High-Speed Hub) downstream devices on all of the enabled downstream ports. A dedicated Transaction Translator (TT) is available for each downstream facing port. This architecture ensures maximum USB throughput for each connected device when operating with mixed-speed peripherals. The Hub works with an external USB power distribution switch device to control VBUS switching to downstream ports, and to limit current and sense over-current conditions. All required resistors on the USB ports are integrated into the Hub. This includes all series termination resistors on D+ and D– pins and all required pull-down and pull-up resistors on D+ and D– pins. The over-current sense inputs for the downstream facing ports have internal pull-up resistors.

• Integrated USB 2.0 Compatible 3-Port Hub
  • 3 Transaction Translators for highest performance
  • High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and Low-Speed (1.5Mbits/s) compatible
  • Full power management with per port or ganged, selectable power control
  • Detects Bus-Power/Self-Power source and changes mode automatically
• Complete USB Specification 2.0 Compatibility
  • Includes USB 2.0 Transceivers
• VID/PID/DID, and Port Configuration for Hub via:
  • Single Serial I2C EEPROM
  • SMBus Slave Port
• Default VID/PID/DID, allows functionality when configuration EEPROM is absent
• Hardware Strapping options allow for configuration without an external EEPROM or SMBus Host
• On-Board 24MHz Crystal Driver Circuit or 24 MHz external clock driver
• Internal PLL for 480MHz USB 2.0 Sampling
• Internal 1.8V Linear Voltage Regulator
• Integrated USB termination and Pull-up/P