1

High-Speed USB 2.0 (480Mbps) Multiplexer with

Overvoltage Protection (OVP) and Overvoltage

Indicator Output

ISL54224

The Intersil ISL54224 is a single supply dual 2:1

multiplexer that can operate from a single 2.7V to 5.25V

supply. It contains two SPDT (Single Pole/Double

Throw) switches configured as a DPDT. The part was

designed for switching of USB data signals in portable

battery powered products.

The 6.5Ω switches were specifically designed to pass

USB high speed/full speed data signals. They have high

bandwidth and low capacitance to pass USB high speed

data signals with minimal distortion.

The ISL54224 has OVP circuitry on the D-/D+ com pins

that opens the USB in-line switches when the voltage at

these pins exceeds 3.8V (typ) or goes negative by -0.5V

(typ). It isolates fault voltages up to +5.25V or down to

-5V from getting passed to the other-side of the switch,

thereby protecting the USB transceivers.

The digital logic inputs are 1.8V logic compatible when

operated with a 2.7V to 3.6V supply. The ISL54224 has

an open drain OE/ALM pin that can be driven Low to

open all switches and outputs a Low when the OVP

circuitry is activated. It can be used to facilitate proper

bus disconnect and connection when switching between

the USB sources.

The ISL54224 is available in 10 Ld 1.8mmx1.4mm

µTQFN and 10 Ld TDFN packages. It operates over a

temperature range of -40 to +85°C.

Features

• High-Speed (480Mbps) and Full-Speed (12Mbps)

Signaling Capability per USB 2.0

• 1.8V Logic Compatible (2.7V to +3.6V supply)

• OE/ALM Pin to Open all Switches and Indicate

Overvoltage Fault Condition

• Power OFF Protection

• D-/D+ Pins Overvoltage Protection for +5.25V and

-5V Fault Voltages

• -3dB Frequency . . . . . . . . . . . . . . . . . . 780MHz

• Low ON Capacitance @ 240MHz . . . . . . . . . 3.3pF

• Low ON-Resistance . . . . . . . . . . . . . . . . . . 6.5Ω

• Available in µTQFN and TDFN Packages

• Pb-Free (RoHS Compliant)

• Compliant with USB 2.0 Short Circuit and

Overvoltage Requirements Without Additional

External Components

Applications*(see page 16)

• MP3 and other Personal Media Players

• Cellular/Mobile Phones

•PDA’s

• Digital Cameras and Camcorders

• USB Switching

Related Literature*(see page 16)

•See AN1571 “ISL54224IRTZEVAL1Z Evaluation

Board User's Manual”

Typical Application

USB 2.0 HS Eye Pattern With

Switches in the Signal Path

ISL54224

USB

TRANSCEIVER

D-

D+

GND

HSD1+

HSD1-

VDD

OE/ALM

µP

VBUS

D-

D+

GND

OVP

500Ω

SEL

LOGIC

CONTROL

3.3V

USB

TRANSCEIVER

100kΩ

HSD2+

HSD2-

3.3V

TIME SCALE (0.2ns/DIV)

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Copyright Intersil Americas Inc. 2010. All Rights Reserved

All other trademarks mentioned are the property of their respective owners.

June 7, 2010

FN6969.0