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digital signal interface over wired connection up to 1 meter

SHIJU R
Prodigy 200 points
Other Parts Discussed in Thread: SN74LVC8T245

Hi,

i want to analyze the digital signal interface  over wires,kindly guide me to do the analysis,

i want to know the impact of cable resistance and capacitance on digital signals.

  • 0
    TI__Guru 60870 points

    Hello Shiju,

    Please provide more information about your system and which TI devices are being used so we can better help you.

    Regards,

    JMMN

  • 0 in reply to JMMN
    Prodigy 200 points

    i want to interface some digital signals between two systems (nearly 1m separation.signals are SP inetrfaceI ,LVTTL SIGNALS-20Nos.through cables i need to route the signals.for that i want to analyze the digital signal transmission through cables(.2 core Twisted pair cables).

    SN74LVC8T245PWthis buffer  iam using in Transmitter side(source side)

    Kindly guide me to analyze the interface through cable

  • 0 in reply to SHIJU R
    TI__Guru 60870 points
    Hi Shiju,

    Thanks for the additional information. I'm moving this question to the correct forum.

    Regards,
    JMMN
  • 0 in reply to JMMN
    TI__Guru 62050 points

    Hi Shiju,

    you can use the IBIS model of the SN74LVC8T245 and simulate the 1m cable and its parasitic effects on the outputs / inputs of the device.

    www.ti.com/.../toolssoftware

    You may most likely need a series limiting resistor to deal with the overshoots and undershoots because of the reflections from the long cable length.

    Let me know.