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SN74AXC1T45: voltage divider for low side VCC

Charley Cai
Prodigy 10 points
Part Number: SN74AXC1T45
Other Parts Discussed in Thread: TLV741P, TLV740P

For the low side VCC input, can we take the high side supply and use a voltage divider to support power to low side VCC? 

Is there any concerns on noise or voltage variation? 

  • 0
    Guru 243870 points

    Power supplies should have very low impedance. You have to decouple it very well (nF and µF in parallel). And this will not work if there is a DC load, so the low side should be the input side.

    I would not design a board without leaving the option to have a small LDO like the TLV740P/TLV741P.