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Original question:

SN65HVD01: HDLC compatibility

SN65HVD01: Skew between 2 parallel transceivers

Tom VDM
Prodigy 20 points
Part Number: SN65HVD01
Other Parts Discussed in Thread: SN65HVD10

Hello,

I am having a new question about the SN65HVD01 transceiver :

Considering 2 transceivers very close together, in the same environment (identical temperature and power supply). Is there any information available about the maximum skew between them ?

The datasheet mention parallel tranceivers for synchronous applications, but without any information about this skew.

I wish you a nice day,

Tom

  • 0
    TI__Genius 15345 points

    Hi Tom,

    The information for the driver and receiver pulse skew can be found in the switching characteristics section:

    As you can see the skew will change based on the slew rate of your device and the overall speed it is operating at. Let me know if this answered your question or if you have another one.

    Best,

    Chris

  • 0 in reply to Chris Ayoub
    Prodigy 20 points

    Hi Chris, and thanks for your answer.

    Please accept my apologies for I wasn't clear in my interrogation.

    As I understand it, Pulse Skew is the difference in propagation delay between the input of the component and the output (ex : single input to diff or diff input to single) in a single component.

    I was asking for a pair of drivers (linked elsewhere to a pair of receivers).

    I have a case where a driver is used for a clock link and another driver is used for a data link with strong constraints on the synchro between them. The components are very close to one another.

    The information I am looking for is the difference i will have in propagation delay between the two adjacent drivers.  Skew that could come from small difference in the fabrication process, etc. It is sometimes called "part-to-part skew"

    I wish you a nice day,

    Tom

  • 0 in reply to Tom VDM
    TI__Genius 15345 points

    Hi Tom,

    The SN65HVD10 is the only device that is characterized by the 'part to part' skew.

    What is the application and requirement of your system? Would the SN65HVD10 work?

    Best,

    Chris