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TLK2711 TXCLK

Mr. Wojciech
Prodigy 10 points


The data sheet suggests that the TXCLK can be slower than 80MHz. If that's the case, what is the slowest speed of that clock?

 

Regards,

 

Wojciech

  • 0
    TI__Guru 62920 points

    Hi Wojciech,

    The TLK2711's TXCLK should be 80 MHz (minimum) to 135 MHz (maximum).  It cannot be slower than 80 MHz.  The rising edge of TXCLK is used to clock in the parallel data, and it is also used by a clock synthesizer to generate the serial rate.  The serial data rate is 20 times the TXCLK rate, so an 80 MHz TXCLK would correspond to the minimum serial rate of 1.6 Gbps and a 135 MHz TXCLK would correspond to the maximum serial rate of 2.7 Gbps.

    I didn't find anything in the datasheet to suggest that the TXCLK should be less than 80 MHz.  If I missed something, please point it out so that we can correct the error.

    Also, please note that the TLK2711 is not recommended for new designs.  It has been replaced by the TLK2711A, which is exactly equivalent in functionality and parametrics.

    Best regards,
    Max Robertson
    Analog Applications Engineer
    Texas Instruments
    m-robertson@ti.com