Can anybody tell me what the level shifting IC is in this schematic, or an equivalent so I can pick some up?
Datasheet (and original product).
It's not that I'm too cheap to buy, I might actually pick one up, but this looks like a small cheerful way to shift levels in my own circuits so being able to reproduce would be quite cool. I know that the correct way to do this is with a MAX232 (or equivalent), but if this works with modern serial ports then it should satisfy my requirements.
Bonus points if anybody can explain how it works. Obviously the TX/RX signal is tied to the base of the transistor which enables the switching, but I'm curious how it shifts the levels. I am assuming the resistor between base and collector has a lot to do with it.
Datasheet (and original product).
It's not that I'm too cheap to buy, I might actually pick one up, but this looks like a small cheerful way to shift levels in my own circuits so being able to reproduce would be quite cool. I know that the correct way to do this is with a MAX232 (or equivalent), but if this works with modern serial ports then it should satisfy my requirements.
Bonus points if anybody can explain how it works. Obviously the TX/RX signal is tied to the base of the transistor which enables the switching, but I'm curious how it shifts the levels. I am assuming the resistor between base and collector has a lot to do with it.