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Hi,
I'm trying to use the CD4097B(PWR) as a 1:8 USB 2.0 multiplexer. Even though it's a differential multiplexer, it doesn't seem to work. Is it even possible with this chip, or are the USB D+ and D- signal too low voltage for this chip to work properly as a USB multiplexer? Could any one provide me any reference designs as to how this would work (Currently I'm doing this on a breadboard; maybe that's my issue). Also, are there any other chips capable of doing 1:8 USB 2.0 (without cascading). I'm looking for a TI chip similar to the MAX4999.
I appreciate your help.
Thank you and best regards,
Ali
Ali,
Please see the FAQ thread question number 2 for the answer to what kind of bandwidth would be required to support USB2.0. The USB 2.0 standard states max data rate of 480Mbs so ~720MHz is need.
We are in the middle of updating the datasheet. Here is a preview of how to configure the device for 1:4 mux
Let me know if this helps.
Thank you,
Adam
Hi Adam,
Thanks for this. However, I had looked at the datasheet and understood how it works. My question was more regarding a hardware reference design, like do I need to add any capacitors, or resistors, etc. of a specific value to specific pins when I'm actually implementing the circuitry for testing or can I do direct digital connections to all of the signal and control lines? Also, for doing a 1:8 using this chip, would it be as simple as branching the USB signals in to INA (or INB) of both chips.
Thank you for your help.
Best regards,
Ali