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你好!
ts3usb30e是不能作为串口的切换开关的,因为串口通讯的电平已经超过了ts3usb30e的VCC范围,即ts3usb30e的VCC的范围是3V~4.3V,且此芯片为单极性芯片,而串口通讯中定义+5~+12V为低电平,而-12~-5V为高电平。故不支持使用此芯片做串口的切换使用。
Tuanwei 你好:
TS3USB30E虽然定义为USB的二选一开关,但也经常用来做USB及UART之间的信号切换,用于调试的UART信号不会超出USB的带宽,这样使用是没有问题的,谢谢!