The ISL54409 is a dual single-pole/single-throw (SPST) switch that provides a very low distortion audio path for a stereo headphone and can be connected in a wired-OR configuration at the switch outputs with USB 2.0 High-Speed signals for audio/USB signal multiplexing to a common connector. The audio switch path can be disabled to provide high signal isolation, preventing crosstalk between the audio codec and USB data signals. The ISL54409 analog switch is negative swing capable with a single supply voltage and maintains excellent THD performance within a signal range of -1V to +1V. The switch terminals have low pin capacitance (4pF typical), minimizing impact to USB 2.0 High-Speed signals. The ISL54409 offers a low power shutdown mode and is available in an 8 Ld TDFN (2mm x 2mm) or a 10 Ld µTQFN (1.8mm x 1.4mm) package. The device operates over a temperature range of -40 °C to +85 °C.


  • Single supply operation (VDD): +2.7V to +5.0V
  • Negative signal handling
  • Low OFF capacitance for high-speed USB: 4pF
  • Power off protection
  • THD+N at 1mW into 32Ω Load: <0.02%
  • Audio muting: >110dB
  • Low power consumption: 21µW with 3V supply
  • Low power shutdown mode
  • USB VBUS hot plug operation
  • Available in 8 Ld TDFN (2mm x 2mm) or 10 Ld µTQFN (1.8mm x 1.4mm) package


  • Consumer entertainment systems
  • MP3 and other personal media players
  • Cellular/Mobile phones
  • PDAs

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active TDFN Reel 1000
Active uTQFN Reel 3000

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ISL54409, ISL54410 Datasheet Datasheet PDF 736 KB
PCN10114 - Part Marking Configuration Change for Intersil TDFN, uTDFN, and uTQFN Packaged Products Product Change Notice PDF 205 KB
TB363: Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs) Other PDF 293 KB

Boards & Kits

Part Number Title Type Company
ISL54409EVAL1Z Audio/USB 2.0 Wired-OR Switch with Click and Pop Reduction Evaluation Board Evaluation Renesas