1

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

Overvoltage Protection (OVP) and Dedicated

Charger Port Detection

ISL54226

The Intersil ISL54226 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 ISL54226 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 OE/ALM logic pin is an open drain input/output that

can be driven to open the switches or monitored to tell

when the part is in an overvoltage state.

The part has an interrupt (INT) output pin to indicate a

1 to 1 (high/high) state on the COM lines to inform the

µ

processor when entering a dedicated charging port

mode of operation.

The ISL54226 is available in 8 Ld 1.2mmx1.4mm

µTQFN and 8 Ld 2mmx2mm 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

• Charger Interrupt Indicator Output

• Power OFF Protection

• COM Pins Overvoltage 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 16)

• 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

ISL54226

USB

TRANSCEIVER

HIGH-SPEED

COM -

COM +

INT

GND

D+

D-

VDD

OE/ALM

µP

VBUS

D-

D+

GND

OVP

DET

500Ω

LOGIC

CONTROL

3.3V

3.3V

100kΩ

4MΩ

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

FN7614.0