Tool/software:
Dear supporter,
Would you help check below question , tks!
1. If VCC is 3.3V, B1 and B2 can use below VCC voltage like 1.8V? How about A follows B1 and B2 voltage rail?
2. If VCC is 3.3V, Select pin follows VIN or VIL of VCC, right?
3. If VCC is 3.3V, B1 or B2 could be different single voltage rail (ex: B1: 3.3V ,B2: 1.8V).
4. What relations of voltage domain are along with VCC,B1,B2 and A? And what are the limitations between them?
Hello Roy,
1. Yes, you can pass a voltage signal less than the supply; but not below 0V. As long as you meet the specs below, there shouldn't be issues.
2. The Select pin fill follow VIH and VIL levels. For VCC = 3.3V VIH will be VCC x 0.7 and VIL will be VCC x 0.3.
Please see table below for VIH and VIL specs.
3. Yes, they can be different as long as the voltage levels don't exceed the recommended operation conditions.
4. This information is in the datasheet.
Please see table below:
Thanks,
Nir
