I am wanting to use a FSTD16211 in my circuit. It's datasheet says that pins OE1 and OE2 should be high to disconnect the 2 channels of the bus, and both should be low to connect the 2 channels of the bus.
Therefore, in my circuit, I need to drive these 2 pins as logic high by default, and my ESP8266 at the heart of the circuit needs to be able to pull these 2 pins low to 'enable' the bus.
The question is, how should I do this - what would best practice be? I was hoping to use level shifters wherever possible as that appears to be a good idea in such use cases...but I cannot determine what the correct shifter would be.
I find it hard to understand the levels that would be considered high or low in this circuit as well.
-0.5v - 7v is the input pin control voltage....so what does that mean? would driving that pin at 3.3v be considered 'high'?
Can somebody point me in the right direction here, with a bit more reasoning and detail than simply 'this is the chip I would use', as the explanation is more important to me than the specific answer. In an ideal world, I would be shown how an appropriate level shifter would be wired into a circuit with a brief explanation of the behaviour to expect from that.