1

High-Speed USB 2.0 (480Mbps) DPST Switch with

Overvoltage Protection (OVP)

ISL54228

The Intersil ISL54228 is a single supply, dual SPST

(Single Pole/Single Throw) switch that is configured as a

DPST. It can operate from a single 2.7V to 5.25V supply.

The part was designed for switching or isolating a USB

high-speed source or a USB high-speed and full-speed

source in portable battery powered products.

The 3.5Ω SPST switches were specifically designed to

pass USB full speed and USB high speed data signals.

They have high bandwidth and low capacitance to pass

USB high speed data signals with minimal distortion.

The device has two logic control pins (OE and LP) to

control the SPST switches.

The ISL54228 has OVP detection circuitry on the COM

pins to open the SPST switches when the voltage at

these pins exceeds 3.8V or goes negative by -0.45V. 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 down-stream transceiver.

The ISL54228 is available in 8 Ld 1.2mmx1.4mm

µTQFN and 8 Ld 2mmx2mm TDFN packages. It operates

over a temperature range of -40°C 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)

•Low Power State

• Power OFF Protection

• COM Pins Overvoltage Detection and Protection for

+5.25V and -5V Fault Voltages

• -3dB Frequency . . . . . . . . . . . . . . . . . . 790MHz

• Low ON Capacitance @ 240MHz . . . . . . . . . . 2pF

• Low ON-Resistance . . . . . . . . . . . . . . . . . . 3.5Ω

• 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 15)

• MP3 and other Personal Media Players

• Cellular/Mobile Phones, PDA’s

• Digital Cameras and Camcorders

• USB Switching

Typical Application

USB 2.0 HS Eye Pattern with

Switches in the Signal Path

ISL54228

USB

TRANSCEIVER

HIGH-SPEED

COM -

COM +

GND

D+

D-

VDD

OE

µP

VBUS

D-

D+

GND

OVP

DET

500Ω

LP

LOGIC

CONTROL

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.

July 29, 2010

FN7628.0