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SN74AUCH16244/ SN74AUC16244

eli
Guru 13485 points
Other Parts Discussed in Thread: SN74AUCH16244, SN74AUC16244

Customer would like to use SN74AUCH16244/ SN74AUC16244 as video buffer:

  1. Usually experiments are done while TPHL/TPLH are the same as tpd. So I this basically setting the buffer bandwidth ?
  2. Datasheet mention VOH,min for output voltage. I have no information regarding input to output voltage ration. Meaning if 1.8v pulse input will result 1.8v output.

For example, output is going to DM368 while input condition for DM368 is from 1.71 to 1.89. how will I know if the buffer will follow its input so that the output will be  in proper range (1.71 to 1.89).

 

  • 0
    TI__Guru* 96862 points

    eli,

    The bandwidth of a device is unrelated to tpd -- as an example, fiber optics have very high tpd, but can carry extreme bandwidth.  tpd just tells you how much of a delay there is from the input to the output.  Bandwidth is related to the throughput capability of the part, which is linked to many external factors in addition to the part itself.

    The VOH values on the datasheet show a range of different loadings and supply voltages vs output droop.  It sounds like the DM368 has a very narrow input window.  Do you know how much current it will draw from the AUC(H)16244?  If it is less than 100 uA, you should see less than 0.1 V of droop on the output.  If it is more than 100 uA, then it can be estimated through the datasheet values or it can be tested in the lab.