ISL54225

High-Speed USB 2.0 (480Mbps) Multiplexer with Overvoltage Protection (OVP)

OVERVIEW

The Intersil ISL54225 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 or routing of USB High-Speed signals and/or USB Full-speed 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 ISL54225 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 ISL54225 has an output enable pin to open all the switches. It can be used to facilitate proper bus disconnect and connection when switching between the USB sources.

The ISL54225 is available in 10 Ld 1.8mmx1.4mm µTQFN and 10 Ld TDFN packages. It operates over a temperature range of -40°C to +85°C.

KEY FEATURES

  • High-Speed (480Mbps) and Full-Speed (12Mbps) Signaling Capability per USB 2.0
  • 1.8V Logic Compatible (2.7V to +3.6V Supply)
  • Enable Pin to Open all Switches
  • Low Power Mode
  • 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
  • Single Supply Operation (VDD): 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

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL54225
Basic Information
Production Status
Mass Production
Configuration
HS/FS
Switch Control
Logic Level
BW High (MHz)
780
BW Full (MHz)
780
IS
23 µA
Supply Voltage Vdd Min
2.7 V
Supply Voltage Vdd Max
5.25 V
Qualification Level
Standard
Supply Voltage Vdd Range (V)
2.7 to 5.25
Can Sample
YES
Temperature Range
-40 to +85

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