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TUSB8042 :TUSB8042 Schematic review

Ymkim
Prodigy 130 points
Part Number: TUSB8042

I'm going to make a 1:4 hub using TUSB8042.

I wrote the circuit by referring to the EVM circuit diagram, but I leave an inquiry to check the board before production.

I want to use EEPROM as the default setting.

SCHEMATIC1 _ 02. USB_Hub.pdfSCHEMATIC1 _ 05. POWER.pdf

  • 0
    TI__Guru 60870 points

    Hello Ymkim,

    Schematic feedback:

    Installing pullups on PWRCTL lines enables battery charging modes on those ports.  Depending on the device connected the port could draw up to 1.5A.  Normal max USB 3.0 power consumption on a port is 900 mA.

    EEPROM is not required for normal operation unless desired.  Do not install a blank EEPROM for normal operation since the hub will attempt to enter programming mode when it detects it.   More information on the EEPROM is available here:  

    Regards,

    JMMN

  • 0 in reply to JMMN
    Prodigy 130 points

    Hello JMMN,

    I understood what you told me.

    We will proceed with the EEPROM processing by N.C.

    Is there anything else I should consider except for the part you mentioned?

  • 0 in reply to Ymkim
    TI__Guru 60870 points

    Hello Ymkim,

    I see no further issues in the schematic.  If USB-IF logo is a concern, I would recommend updating to the TUSB8042A device, which is pin for pin.  Document on updates in the TUSB804xA family is here:  

    In normal operation it would be unlikely to see any impact from these changes.

    Regards,

    JMMN

  • 0 in reply to JMMN
    Prodigy 130 points

    Hello JMMN,

    If necessary, I will change it to TUSB8042A and use it.

    I really appreciate your help.