USB 2.0 4-Port MTT Hub

XR

22414

1/13

REV1A

FEATURES

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USB 2.0 compliant interface

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Multiple transaction translators (MTT)

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Regulated +3.3V Output Power

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Individual port and hub activity LED

indicators

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Individual or ganged port power enables

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Individual or global overcurrent sensing

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Single 5V or 3.3V power supply

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Single 12MHz Crystal

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48-pin QFN and LQFP package options

APPLICATIONS

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USB port expansion

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POS Terminals

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Test Instrumentation

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Factory Automation and Process Controls

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Industrial Applications

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

Ordering Information - Back Page

XR22414

USB Host

Device #1

Device #2

Device #3

Device #4

Upstream Phy

Hub Controller

Downstream

Phy #1

Downstream

Phy #2

Downstream

Phy #3

Downstream

Phy #4

TT #1

Port Routing Switch

TT #2

TT #3

TT #4