ISL54228 Datasheet, PDF (1/17 Pages) Intersil Corporation – High-Speed USB 2.0 (480Mbps) DPST Switch with Overvoltage Protection (OVP)

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
• Single Supply Operation (V_DD) . . . . 2.7V to 5.25V
• 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
3.3V
500Ω
VDD
USB 2.0 HS Eye Pattern with
Switches in the Signal Path
VBUS
D- COM -
OVP
DET
D+ COM +
GND ^ISL54228
LOGIC
LP
CONTROL OE
D-
D+
GND
µP
USB
HIGH-SPEED
TRANSCEIVER
TIME SCALE (0.2ns/DIV)
July 29, 2010
FN7628.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2010. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.