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Original question:

CD4504B: Can I use for 3.3V to 12V voltage shift?

CD4504B: When VCC =3.3V, how Vih and Vil are determined?

NY
Expert 3040 points
Part Number: CD4504B

Hi,

My customer want to use the case in Vcc=3.3V and Vdd=7.2V. According to related question, I konw Vcc=3.3V can work as well in customer usecase.

But in datasheet of DC4504B, there is no specification of VIL and VIH at Vcc=3.3V. 

Would you please tell us know the min/max of VIL and VIH at Vcc=3.3V?

Best Regards, NY

  • 0
    Guru 316690 points

    At 3.3 V, there are no guarantees (neither for VIH/VIL nor for the propagation delay).

    You can extrapolate from the other values and assume 0.3 × VCC / 0.7 × VCC. In any case, the other 3.3 V device should have no problems driving high-impedance CMOS inputs to near the rails.