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SN74CB3T1G125 operation with VCC less than VCC MIN.

Oleg Sivak
Prodigy 40 points
Other Parts Discussed in Thread: SN74CB3T1G125

Hi,

What level/state is expected on pin B if VCC is 1.8V, OE = 0 and pin A is 5.0V?

Thanks,

Oleg

  • 0
    TI__Mastermind 46480 points

    Hello Oleg

     I could not find any data for Vcc at 1.8V. However I can say that since we did not spec the part down to 1.8V that it probably does not function correctly at that voltage. 

  • 0 in reply to Chris Cockrill
    Prodigy 40 points

    Hellow Chris,

    Thank you for your reply.

    I do not expect SN74CB3T1G125 to function correctly in such conditions. SN74CB3T1G125 pin B is connected to 1.8V tolerant FPGA pin so i have to decide whether to remove SN74CB3T1G125  or not from the board in order not to damage the FPGA.

    Although, i think that FET does not open with VCC=1.8V so pin B will be in Z condition, i do not have enough knowledge in this area so decided to ask TI E2E Community. May be someone has faced this situation.

    Thanks,

    Oleg