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Raju,

There is nothing wrong with your idea.  The question becomes what SUB speed peripherals do you need to suport.  the TUSb2046B supports USB full-speed (12 Mb/s) as its maximum data transfer rate.  If you need USb high-speed (480 Mb/s) support, TI does not have such a hub.

We do not have a schematic showing these two devices working togther - attached is a reference design for the TUSB2046B as a self-powered hub.

When the switch is "thrown" to change which host PC is talking to the hub, it will go through a full re-enumeration on the new host system.  Reset is only need to be changed if power-cycling.

Hi DHarmon,

Thanks for the clarification. 12 Mb/s is ok for me.

Could you please provide me the schematic diagram for "TS3USB221A" USB switch also.

Thanks,

Raju.

The TS3USB221A is supported by a different business unit and I have asked them to respond - you could also post your request in the Signal Switch forum which is closely monitored by that support team.

2350.scdu001a[1].pdf

Raju,

Attached is the EVM guide for the TS3USB221A. On page 7 there is the schematic for the EVM, the documentation also displays the EVM layout layers. Below is a link to the TS3USB221A EVM page if you would like to order a board to test.

http://www.ti.com/tool/ts3usb221aevm#descriptionArea

Regards,

Eric N.

Hi Eric N,

Thanks for the reply. I have prepared schematic for this, based on your inputs.

Attached document here.

Could you please review it and provide me your suggestions or modifications.

Thanks,

Raju.

Raju,

The only suggestions I would recommend is there is no need for the 10k resistor on Vcc unless you have a specific reason for using it. You many also wish to consider a 1uF decoupling cap on Vcc.

This is assuming the 3.3V LDO power supply is implemented correctly, if you are unsure of this I recommend using the part/design in the EVM guide.

Regards,

Eric N.