Diodes’ switch supports mobile devices’ move to USB Type-C port

The PI3A6386 USB Type-C multimedia port switch is designed to enable manufacturers to continue supporting legacy data and analogue peripherals as mobile phones and tablet manufacturers migrate from USB 2.0 and 3.5mm audio sockets. Diodes’ PI3A6386 port switch enables legacy data and audio signals to be passed through the USB Type-C port, allowing consumers to continue using existing peripherals.

The port switch ensures a high level of audio quality, without signal distortion or noise, says Diodes. It includes autonomous microphone and ground line switching, and delivers an on resistance of just one Ohm for the audio switching transistor. The CMOS switch also delivers low crosstalk between data and audio channels with a crosstalk rejection of -85dB at 30kHz. Separate ground switches for the audio and data signals further minimise crosstalk, adds Diodes.

Other design features include a programmable soft-start and soft-stop time, which eliminates the pop and click that audio signals can experience when they are DC-coupled.

The PI3A6386 operates from a supply of between 1.7 and 5.5V, making it suitable for portable devices. It can also process signals of ±3.0V, which further improves the dynamic range and audio quality.

The PI3A6386 supports USB 2.0 high speed and full speed signals and USB Type-C audio accessory mode. The total harmonic distortion (THD) of -110dB is maintained from 20Hz to 20kHz with a signal of 2.0V RMS into a 32Ohm load.

The PI3A6386 is available in the TQFN-24 package.


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