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SN74LVC1G66: SN74LVC1G66

Nic Lin
Intellectual 2020 points
Part Number: SN74LVC1G66

Hi Team,

Customer is using SN74LVC1G66 to transfer I2C signal. The pull-up supply of I2C is 3.3V . The power supply of switch is 5V, which means that the high-level input voltage is 3.5V, higher than 3.3V.

Can SN74LVC1G66 still used in this application? If not, any recommendation can we provide to customer? 

 

Regards,

Nic

  • 0
    TI__Expert 3180 points
    Hello Nic,

    The VIH and VIL have nothing to do with the Vi/o voltages going in or out of the SN74LVC1G66. The VIH and VIL instead are the proper voltage levels to apply to the C pin (the control pin (OE), in your system it is the BPWRG pin) that allows a signal to pass or be isolated.
    The spec you need to pay attention to is VI/O in that same table, right under Vcc. This spec dictates what voltage values can be passed through.

    Thank you,
    Louie
  • 0 in reply to Louie
    TI__Intellectual 2020 points
    Thanks Louie for your clear answer!
    Nic