USB2504-JD中文资料SMSC数据手册PDF规格书

General Description

The SMSC 4-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 4-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.

PRODUCT FEATURES

■ Integrated USB 2.0 Compatible 4-Port Hub

— 4 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/Pull-down resistors

■ Internal Short Circuit protection of USB differential signal pins

■ 1.8 Volt Low Power Core Operation

■ 3.3 Volt I/O with 5V Input Tolerance

■ 64-Pin TQFP lead-free RoHS compliant package