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TS3A27518E-Q1: Whether could achieve logic and also achieve level shift at the same time

Amelie Zheng
Genius 10865 points
Part Number: TS3A27518E-Q1
Other Parts Discussed in Thread: TS3A27518E, SN74CB3T3257

Hi Team,

Whether TS3A27518E-Q1 could achieve logic and also achieve level shift at the same time？

  

  • 0
    TI__Mastermind 24023 points

    Hey Amelie,

    The TS3A27518E (and all other TI analog multiplexers / switches) are passive and will just provide a path when the channel is selected that gives an equivalence of a 4.4ohms (typ). It will not behave as a level shifter. So if you're trying to drive the 1.8V SDIO port signal to both the 3.3V and the 1.8V memory card then you will need an extra level shifter before the 3.3V device. 

    Thanks,
    Rami

  • 0
    Guru 244930 points

    Only CB3T switches support level shifting. The only CB3T 2:1 switch is the SN74CB3T3257, and it would require at least 2.5 V.