XR22414DS Datasheet, PDF (1/13 Pages) Exar Corporation – USB 2.0 4-Port MTT Hub

XR22414
USB 2.0 4-Port MTT Hub
General Description
The XR22414 is a USB 2.0 4-port hub using multiple transaction
translators (MTT) for highest possible bandwidth capability.
The upstream USB interface has an integrated USB 2.0 PHY and
device controller that is compliant with both Hi-Speed (480Mbps) and
Full-Speed (12Mbps) and downstream PHY supporting Hi-Speed,
Full-Speed and Low-Speed (1.5Mbps) on each of the 4 downstream
ports.
The XR22414 provides two power modes, ganged or individual power
control as well as global or individual over-current sensing modes.
The XR22414 operates from a single 5V or 3.3V power input. When
powered by 5V, internal regulators provide a 3.3V output which may
be connected to VCC33 power input pins as well as external circuitry.
In turn a second internal regulator provides a 1.8V output from the
3.3V input. This 1.8V output may be connected to VCC18 power input
pins. Individual port activity and overall hub activity indicators provide
status outputs for external LEDs.
Block Diagram
USB Host
FEATURES
■■ USB 2.0 compliant interface
■■ Multiple transaction translators (MTT)
■■ Regulated +3.3V Output Power
■■ Individual port and hub activity LED
indicators
■■ Individual or ganged port power enables
■■ Individual or global overcurrent sensing
■■ Single 5V or 3.3V power supply
■■ _{Single 12MHz Crystal}
■■ 48-pin QFN and LQFP package options
APPLICATIONS
■■ USB port expansion
■■ POS Terminals
■■ Test Instrumentation
■■ Factory Automation and Process Controls
■■ Industrial Applications
Ordering Information - Back Page
XR22414
Upstream Phy
Hub Controller
Port Routing Switch
TT #1
TT #2
TT #3
TT #4
Downstream Downstream Downstream Downstream
Phy #1
Phy #2
Phy #3
Phy #4
Device #1 Device #2 Device #3 Device #4
REV1A
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