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USB333X データシート(PDF) 39 Page - Microchip Technology

部品番号 USB333X
部品情報  Industry?셲 Smallest Hi-Speed USB Transceiver with Single Supply Operation
PDF  85 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB333X データシート(HTML) 39 Page - Microchip Technology

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 2009 - 2015 Microchip Technology Inc.
DS00001880A-page 39
USB333x
In addition to USB Audio support the switches could also be used to multiplex a second Full Speed USB PHY to the
USB connector. The signal quality will be degraded slightly due to the “on” resistance of the switches. The USB333x
single-ended receivers described in Section 5.2.1 are enabled while in synchronous mode and are disabled when Carkit
Mode is entered.
The USB333x does not provide the DC bias for the audio signals. The SPK_R and SPK_L pins should be biased to
1.65V when audio signals are routed through the USB333x. This DC bias is necessary to prevent the audio signal from
swinging below ground and being clipped by ESD Diodes.
When the system is not using the USB Audio switches, the SPK_R and SPK_L switches should be disabled.



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