The ISL54222A is a single supply dual 2:1 multiplexer that can operate from a single 1.8V to 3.3V supply. It contains two Single Pole/Double Throw (SPDT) 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 4.4Ω switches can swing rail-to-rail and were specifically designed to pass USB Full-Speed data signals that range from 0V to 3.3V and USB High-Speed data signals that range from 0V to 400mV with a single supply as low as 1.8V. They have high bandwidth and low capacitance to pass USB High-Speed data signals with minimal distortion. The digital logic inputs are 1.8V logic compatible when operated with a 1.8V to 3.3V supply. The ISL54222A has an output enable pin to open all the switches and put the part in a low power state. The ISL54222A is available in 10 Ld 1.8mm x 1.4mm µTQFN, 10 Ld 2.1mm x 1.6mm µTQFN, 10 Ld TDFN and 10 Ld MSOP packages. It operates over a temperature range of -40 °C to +85 °C.


  • High-speed (480Mbps) and full-speed (12Mbps) signaling capability per USB 2.0
  • 1.8V logic compatible
  • Low power all off state
  • Power OFF protection
  • D-/D+ pins overvoltage tolerant to 5.5V
  • -3dB frequency: 780MHz
  • Low ON capacitance @ 240MHz: 4.2pF
  • Low ON-resistance @ VDD = 3V: 4.4Ω
  • Low ON-resistance @ VDD = 1.8V: 5.7Ω
  • Single supply operation (VDD): 1.8V to 3.3V
  • Available in µTQFN, TDFN, MSOP packages
  • Pb-free (RoHS compliant)
  • Compliant with USB 2.0 short circuit and overvoltage requirements without additional external components
  • HBM ESD performance I/O to GND: >12kV



  • MP3 and other personal media players
  • Cellular/Mobile phones
  • PDAs
  • Digital cameras and camcorders
  • USB switching


Design & Development

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