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LSF0102 / AC Performance

Toshiyuki
Mastermind 7075 points
Other Parts Discussed in Thread: LSF0102, LSF0101

Hi,

I have some questions about LSF0102 device.

Q1

Please let me know how to swich the output mode Push-Pull or Open Drain.

Q2

AC Performance described in data sheet is TPLH/TPHL TYP only.

What is TPLH/TPHL MAX?

In addition, what is the switching time(TYP,MAX) from EN pin toggled to A,B switched on?

Best Regards,

Kato

 

  • 0
    TI__Expert 6430 points

    Hi,

    LSF is based on current mirror circuits. Thus, the device will work correctly when input signal is the voltage which is in the normal input voltage range. As for push-pull or open-drain I/O, they are just the application electrical feature.

    Thanks

    Wei

  • 0 in reply to Wei Lang
    Mastermind 7075 points

    Wei - san,

    Thank you for the reply.

    Please let me know what TPLH/TPHL MAX is.

    In addition,what is the switching time from EN pin toggled to A /B output?

    Best Regards,

    Kato

  • 0 in reply to Toshiyuki
    TI__Expert 6430 points

    Hi Kato,

    For Tplh/Tphl, they are all depend on which way it is translating. When translating down it will be fast and is specd in the datasheet as typical like switches. When translating up it will depend on the pullup resistor an voltage being pulled to. You can use LSF0101 IBIS mode to run simulation with the applcation.

     The time from EN toggled to output is about 5ns.

    Thanks

     

  • 0 in reply to Wei Lang
    Prodigy 10 points

    Hello,

    I'm trying to use IBIS model for LSF0102 with Hyperlynx (Mentor Graphics) but the tool says that the IBIS model has errors and cannot be processed.

    Did you suffer from this error? (please review the log)

    C:/AppData/Local/Temp/ibs7266.tmp/lsf0102.ibs(82) : Warning : Only the first combination from the [Series Switch Groups] will be used.
    C:/AppData/Local/Temp/ibs7266.tmp/lsf0102.ibs(123) : Warning : Only the first combination from the [Series Switch Groups] will be used.
    C:/AppData/Local/Temp/ibs7266.tmp/lsf0102.ibs(4109) : Error : Pin model LSF0101_IO_S used by the series pin mapping from pin 4 to pin 5 of component LSF0102DCU does not exist in this file.
    C:/AppData/Local/Temp/ibs7266.tmp/lsf0102.ibs(4109) : Error : Pin model LSF0101_IO_S used by the series pin mapping from pin 3 to pin 6 of component LSF0102DCU does not exist in this file.
    C:/AppData/Local/Temp/ibs7266.tmp/lsf0102.ibs(4109) : Error : Pin model LSF0101_IO_S used by the series pin mapping from pin 4 to pin 5 of component LSF0102DCT does not exist in this file.
    C:/AppData/Local/Temp/ibs7266.tmp/lsf0102.ibs(4109) : Error : Pin model LSF0101_IO_S used by the series pin mapping from pin 3 to pin 6 of component LSF0102DCT does not exist in this file.
    Error : Parse failed on file C:/AppData/Local/Temp/ibs7266.tmp/lsf0102.ibs.
    C:\AppData\Local\Temp\ibs7266.tmp\lsf0102.ibs - 5 error(s), 7 warnings(s)

  • 0 in reply to jcasero
    TI__Expert 6430 points

    Please post your question on 'Logic forum'. The engineer in logic forum will be more familiar with LSF0102.

    Thanks

    Wei