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SN74AHCT1G126-Q1: Buffer 3.3V logic to 6.5V

Marco Rojas
Intellectual 1590 points
Part Number: SN74AHCT1G126-Q1
Other Parts Discussed in Thread: UCC27517A-Q1, CD40109B-Q1

Hi team,

I have a customer that wants to use the SN74AHCT1G126-Q1 for their design to move 3.3V logic to 6.5V, however the part says the max is 7.0V and they feel that it might be resting too close to its limit and would prefer something with a higher voltage threshold (or reassurance that stability near the rail isn't an issue). 

This would help my customer eliminate a 5V supply, which would help greatly. Let me know what you think!

Thanks in advance

Marco

  • 0
    Guru 259550 points

    As shown in section 6.3, the highest AHCT supply voltage would be 5.5 V.

    To convert to a voltage higher than nominally 5 V, you need a CD4000 device like the CD40109B-Q1, or a gate driver like the UCC27517A-Q1.