SN74LV1T126: input higher than VCC

Hi Andrew,

Yes the two use cases you describe above are within normal operating conditions of the device. For use case 1 (VCC = 1.8V, Input = 3.3V) the customer can expect to see the 3.3V input down translated to 1.8V. For use case 2 (VCC = 3.3V, Input = 1.8V) the customer can expect to see the 1.8V input up translated to 3.3V. The features section of the datasheet highlights these use cases as shown below.

For more information on use case 1 where Vcc < Vin, see the FAQ Can the input voltage (Vi) to my logic device be higher than the supply voltage (Vcc)?

Use case 2 can also be confirmed by viewing the VIH for a 3.3V supply in the electrical characteristics table in the datasheet:

Thanks,

Anthony