Intersil has released ISL54400 and ISL54401 incorporate circuitry for detection of the USB VBUS voltage, which are used to switch between the audio and USB signal source in the portable device. The ISL54400 includes circuitry for generation of a VTERM voltage of 3.3V for use with USB speed setting pull-up resistor. The ISL54400, ISL54401, ISL54402 are available in 10 Ld 3mm x 3mm TDFN and 10 Ld tiny 2.1mm x 1.6mm ultra-thin µQFN packages. They operate over a temperature range of -40 to +85°C. The ISL54400 dual single-pole/double throw (SPDT) switch combines low distortion audio and accurate USB 2.0 full-speed data signal switching in one low-voltage device. When operated with a 2.5V to 3.6V single supply, the ISL54400 allows audio signal swings below-ground, enabling the use of a common USB and audio headphone connector in personal media players and other portable battery-powered devices. |
