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USB2524_07 Datasheet, PDF (1/57 Pages) SMSC Corporation – USB MultiSwitchTM Hub | |||
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USB2524
USB MultiSwitchTM Hub
PRODUCT FEATURES
Datasheet
 USB 2.0 Compatible 4-Port Hub with two upstream
host port connections
â Provides electronic reconfiguration and re-assignment
of any of its 4 downstream ports to either of two
upstream host ports (âon-the-flyâ).
â Allows multiple USB hosts to share peripherals and
enables a user to dynamically assign host ownership.
â Embedded Mode - 8 (predefined, OEM
programmable) configurations for port
assignment are selectable via three external
control signals.
â Peripheral Mode - Dedicated select pin for
every downstream port (total of 4), selectable
edge or level triggered in order to support a
wide range of possible switch configurations
and styles.
â Each host has a dedicated Single Transaction
Translator (Single-TT) for supporting FS/LS devices, or
can also operate in Multi-TT mode where each
downstream port has a dedicated Transaction
Translator.
 Downstream ports can be disabled or defined as non-
removable
 Switching hub can be configured as compound
device for support of âembeddedâ USB peripherals
 Multiple LED modes for maximum implementation
flexibility
â USB Mode - 2 Single-color LEDs for each downstream
port (total of 8 LEDs).
â Host Ownership Mode - 8 Single-Color LEDs indicate
which upstream host each of the downstream ports are
assigned to.
â Host Ownership & Port Speed Mode - 8 Dual-Color
LEDs are used to indicate which upstream host each of
the downstream ports are assigned to, while
simultaneously indicating downstream port connection
speed.
 Enhanced configuration options available through
either a Single Serial I2C EEPROM, or SMBus Slave
Port
â VID/PID/DID
â Port Configuration
â String Descriptors (each can support a maximum length
of 31 characters)
â Custom Manufacturer String
â Custom Product String
â Custom Serial String
â Assignment of downstream ports to upstream hosts
â Switching mechanism selection
 Hardware Strapping options allow for configuration
without an external EEPROM or SMBus Host
â Default VID/PID/DID, allows functionality when
configuration EEPROM is absent
 Complete USB Specification 2.0 Compatibility
â Includes USB 2.0 Hi-Speed Transceivers
â High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and
Low-Speed (1.5Mbits/s) compatible
â Full power management with choice of Individual or
Ganged power control
 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
 56-Pin QFN Lead-free RoHS Compliant Package
SMSC USB2524
DATASHEET
Revision 1.91 (08-22-07)
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