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ONET4211LD: Standalone working

Kuramochi Tadahiko
Guru 28715 points
Part Number: ONET4201LD
Other Parts Discussed in Thread: ONET4291VA

Hi,

Can the ONET4201LD work with standalone(without MCU)?

(I inputted the wrong product name ONET42"1"1 of the subject)

And can the ONET4201 drive VCSEL?

If it can, could you show me the reference circuit?

Best Regards,

Kuramochi

  • 0
    Guru 28715 points

    Hi Team,

    I think that ONET4201LD doesn’t  support VCSEL driver.

    So could you tell me 4.25Gbps VCSEL driver that does not need MCU ?

    If you have any questions, please let me know.

    Best Regards,

    Kuramochi

  • 0 in reply to Kuramochi Tadahiko
    TI__Intellectual 1715 points

    Hi Kuramochi-san,

    Thank you for your interest in TI's VCSEL drivers.

    ONET4291VA is our VCSEL driver designed to work with 4.25Gbps VCSELs. It has digitally-controlled modulation and bias current settings, we do not have any VCSEL driver that has a GPIO mode (pin-control mode) for these input settings.

    However, the ONET4291VA does not need any dedicated MCU to work. The ONET4291VA chip includes a 2-wire serial interface control block in it, which allows the device to directly interface with a microprocessor through I2C, eliminating the need for external components. The modulation and bias current settings are thus controlled through the I2C pins- SDA, SCK (Pins 5, 4).

    Hope that answers your question, please let us know for any further queries.

    Thanks!

    Best,

    Sri

  • 0 in reply to Sriharsha Kota Pavan
    Guru 28715 points

    Sriharsha-san,

    Thank your for your help.

    >However, the ONET4291VA does not need any dedicated MCU to work.
    >The ONET4291VA chip includes a 2-wire serial interface control block in it, which allows the device to directly interface with a microprocessor through I2C, eliminating the need for external components.

    After all, is a microprocessor necessary to send 2-wire serial data?

    Best Regards,
    Kuramochi

  • 0 in reply to Kuramochi Tadahiko
    TI__Intellectual 1715 points
    Hi Kuramochi-san,

    Yes, a digital controller/microprocessor would be necessary to talk to the ONET4291VA chip through I2C for setting the mod/bias currents.

    Thanks,
    Sri