TPS7A66-Q1: Reset timer delay function

Part Number: TPS7A66-Q1

Tool/software:

Dear team,

Q#1: Can we know the minimum and maximum value of 1V and 1uA here? We can refer to Fig.11 and Fig. 12 for the temperature variation but still not mentions min/max.

According to the datasheet page6, I(chg)=1.4uA_typ.

Q2#: Why is the equation using 1uA instead of 1.4uA? 

Best regards,
Yuto Kitamura