Hi all,
my customer has an adapter board to translate signal from A domain (VCCA) to B doamain (VCCB). In most of the cases VCCA is less than VCCB. Since the adpater is general purpose there is the possibility that VCCA=VCCB=3.3V.
The 3.3V is generated from 2 different branches and due to layout, loads, etc.. the 3.3V of A domain could be higher than the 3.3V of B domain, so the relation VccA<=VccB is at the edge.
In the datasheet I've seen the timing table 6.10, VccA =3.3V +/-0.3V and the case VccB = 3.3V +/-0.3V. If I consider the tolerance, can the two voltages be considered equal if their difference |VccA-VccB| <= 0.42V @ VccA=3.3V ?
If no, which is the tolerance in the relation VccA=VccB (the electronics is not maths :) ) ?
thanks,
Domenico
