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Original question:

PCA9306-Q1: Can I use same voltage level at Vref and Vdpu?

PCA9306: Can VREF1 and VREF2 be same voltage?

JatanNaik
Expert 4011 points
Part Number: PCA9306
Other Parts Discussed in Thread: SN74AUC2G66

Hi, Can VREF1 and VREF2 be same voltage?  My customer would like to use 1.8V for both pins.

Thanks!

  • 0
    Guru 243180 points

    No, this cannot be done. The recommended operation conditions table says:

    (1) To support translation, VREF1 supports 1.2 V to VREF2 - 0.6 V. VREF2 must be between VREF1 + 0.6 V to 5.5 V.

    This device is a passive switch and does not buffer the signals. If you want to disconnect the two sides, use an analog switch like the SN74AUC2G66.