ADM2682E Logic Inputs (DE, RE, TxD) Threshold

The digital input voltages in this datasheet are defined as the max/min thresholds of the input pin, rather than the max/min input voltages that should be applied to the pin,

For input low, the threshold voltage is a minimum of 0.27Vcc, which means the input voltage should be a maximum of 0.27Vcc for a logic low

Similarly for the input high, the threshold voltage is a maximum of 0.7Vcc, which means the input voltage should be a minimum of 0.7Vcc for a logic high

Agree this is a little confusing, hope this helps, 

Regards,

Neil  

Thank you. Clear now digital inputs thresholds.

I think I can put one more short question here about the same IC here, instead of open a new title;

-Is there a minimum power supply Vcc voltage for generating internal isolated power? When I give 3.3V to Vcc, will Visoout be internally generated? Or should I give 5V to Vcc for internal isolated power generation? 

Thank you. 

No problem, the minimum Vcc power supply is 3V. The Visoout will be internally generated as long as the Vcc voltage is between the 3V - 5.5V range. All max/min specifications will be met under this supply range. 

If you're looking for where this is guaranteed in the datasheet, it's at the top of page 3 on the datasheet, in the text above Table 1

regards,

Neil