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Ken Shirriff

The chip's die is pretty complicated, considering that it just converts voltages and doesn't deal with the bus protocol at all. Here's a block diagram from the datasheet. 3/18

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Ken Shirriff

The chip is built with bipolar transistors (NPN and PNP), not the CMOS circuits used in most modern chips. Here are four NPN transistors with the collector (rectangle), base (smaller rectangle), and emitter (small square) on each rectangular transistor. 4/18

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