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TMUXHS4212: SEL and OEn inputs

McKenna Strambi
Intellectual 1560 points
Part Number: TMUXHS4212

Tool/software:

Hi expert,

Customer has a question regarding SEL and OEn inputs. 

The datasheet seems to have conflicting information in the recommended operating conditions vs the applications section.

The recommended operating section indicates that for 3.3V VCC we would need 2.475V input on the SEL/OEn pins for a logic high.  However, the applications section calls out 1.42V as VIH with VCC at 3.3V.  Can you confirm which is correct?  (Customer was hoping to use a 1.8V logic level signal for SEL/OEn pins so just double checking if they need a level shifter or not). See datasheet snips below.

Thank you!

McKenna

  • 0
    TI__Mastermind 18145 points

    Hello McKenna,

    The information in the typical application seems to be a typo. They might have used the 1.8V high speed signal voltage rather than the 3.3V supply voltage.

    Please tell the customer to follow the specifications shown in the recommended operating conditions table.

    Thanks,

    Nir