Forum Discussion

FRoth's avatar
FRoth
Icon for New Contributor rankNew Contributor
7 years ago

Difference between CML and High Speed Differential IO transceiver I/O standard

We are using A10 transceiver blocks and we use CML and High Speed Differential I/O pin standards interchangeably, since these two standards seem to us to basically describe the same thing. Could you please explain the differences between CML and High Speed Differential I/O, so we could confirm our approach?

Thank you for Your help

2 Replies

  • CheepinC_altera's avatar
    CheepinC_altera
    Icon for Regular Contributor rankRegular Contributor

    Hi FRoth,

    Yes your understanding is correct. In term of the A10 XCVR, when you use CML and High Speed Differential I/O, the TX and RX specs are actually the same. The only difference is that the A10 TX only support High Speed Differential I/O standard but RX can support High Speed Differential I/O, CML , Differential LVPECL , and LVDS standards.

    Please let me know if there is any concern. Thank you.

    Best regards,

    Chee Pin

  • CheepinC_altera's avatar
    CheepinC_altera
    Icon for Regular Contributor rankRegular Contributor

    ​For further details on the A10 TX and RX specs, you may also refer to the Receiver Specifications and Transmitter Specifications tables in the A10 datasheet. Thank you.