下载
SMSC USB2504/USB2504A PRODUCT PREVIEW Revision 1.8 (11-11-05)
Data Brief
PRODUCT FEATURES
USB2504/USB2504A
Integrated USB2.0
Compatible 4-Port Hub
■ Integrated USB2.0 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 USB2.0 Transceivers
■ VID/PID/DID, and Port Configuration for Hub via:
— Single Serial I
2
C 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 USB2.0 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 or 56 Pin QFN Package; green, lead-
free package also available
