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Original question:

[FAQ] How do the LSF translators work?

LSF0204-Q1: LSF0204-Q1

Mohammad sawaftah
Prodigy 90 points
Part Number: LSF0204-Q1

Hello,
I am using the LSF0204-Q1 Levelshifter in my application. 

1) Can the channels be operated independently in different directions at the same time (for example channel 1 from A to B and at the same time channel 2 from B to A)?

2) Could i use on VREF_A any voltage between (0.95 V - 3.3 V ) and translate it to any voltage on VREF_B (1.8 V - 5.5 V)  ? (for example VREF_A 1.65 V to VREF_B 3.3 V)

Thanks in Advance.

Mohammad

  • 0
    TI__Guru 55970 points

    Mohammed,

    Yes, LSF device is flexible to have

    1) Channel 1 from A to B and channel 2 from B to A.

    2) Channel 1 from 1.65 to 3.3V and channel 2 from 3.3V to 1.65.

    It could also do 1.65 to 5.5V on port 1, 1.65V to 3.3V on port 2 ,  5.5 to 1.65V on port 3, 5.5 to 3.3V on port 4 with the appropriate pullup voltage levels. 

    Please refer to the FAQ on the working of the LSF device below, which also has links to the videos.

  • 0 in reply to ShreyasRao
    Prodigy 90 points
    Hello Shreyas,

    Thank you for your fast replay and for answering my question, it was so helpful. My last question is: is it possible to use the Enable-Pin with an separate line (The Voltage-Value will be greater than VREF-A voltage-value) or should it be always connected to VREF-B or VREF-A power supplys?

    Thanks
  • 0 in reply to Mohammad sawaftah
    TI__Guru 55970 points
    Hi Mohammad,

    Glad to help.
    The EN pin is referenced to VrefA supply. Which means that the Vih and Vil is based on the VrefA supply voltage level.
    The EN pin also overvoltage tolerant and hence could be connected to a value higher than VrefA but within the rec. operating condition.