Hi team,
My customer asks why Vout changes to a high level when Vin is smaller than VIH, and the test waveform is shown below (2B1 represents Vin changing from 1.34V~1.96V, 2A1 represents Vout).
In my opinion, with increased speed, logic devices have become more sensitive to input. A slow input edge rate or invalid logic level, coupled with the noise generated on the power rails when the output switches, can cause excessive output errors or oscillations. For SN74AVC16T245, the input level between 0.8V ~ 2V is not a valid logic level, especially a signal that varies between 1.34 ~1.94V. Therefore, Invalid input causes output oscillation in the test waveform.
Is my opinion correct? If not, can you tell me how to explain this to the customer?
Thanks a lot.
Best regards,
Silvia Gao
