The Intersil ISL54210 dual SPDT (Single Pole/Double Throw)
switch combines low distortion audio and accurate USB 2.0
high speed data (480Mbps) signal switching in the same low
voltage device. When operated with a 2.7V to 3.6V single
supply, these analog switches allow audio signal swings
below-ground, allowing the use of a common USB and audio
headphone connector in Personal Media Players and other
portable battery powered devices.
The ISL54210 incorporates circuitry for the detection of the
USB VBUS voltage, which is used to switch between the audio
and USB signal sources.
The part has an audio enable control pin (CTRL) to open all
in-line switches and activate the audio click and pop circuitry.
The high off-isolation and special click/pop circuitry of the
audio switches eliminates click and pops in the head-phones
when the audio CODEC drivers are powering up or down or
when a headphone is inserted or removed from the
headphone jack.
It’s available in a tiny 10 Ld 1.8mmx1.4mm ultra-thin μTQFN
package and a 10 Ld 3mmx3mm TDFN package. It operates
over a temperature range of -40°C to +85°C.