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Yes. And if you're looking for one, you won't find one by itself. They tend to come in six-packs. For example, perhaps one of the most common is the 74LS04, "Hex inverter". The "hex" means there are six seperate inverters on that single (14-pin) chip. So, if you wish to build that circuit, using TTL logic, you'll need a 74LS04 (or similar), and only use one of the six inverters in it.
I suppose you could build you own single inverter with a transistor and a couple of resistors, but that's another topic.
BTW, were'd the diagram come from? Seems like I remember seeing it before, but now I can't find it.
PPS--FWIW, on my test bench (with a switcher) I've had two SI boardsets work just fine with the POR line (on the daughter board) simply tied to ground...
It comes from the the pin out chart for the 2/3 layer board sets in SI.
I'm probably nitpicking here, but normally, an inverter is drawn as a triangle with a 'hollow' dot at the output end, like in the 7404 diagram above. I'm sure the OP's drawing is for an inverter, but they mistakenly blacked out the dot. A solid black dot just represents a wiring connection, and a plain triangle by itself represents an op amp.
i was looking at that diagram, if pins 1/8 were flipped, and 2/3 were flipped it would almost have the pinout of a 555 timer![]()