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Ken Shirriff said...

Anonymous, you can build a transmission gate with a single transistor, and that's how chips like the 6502 do it. However, PMOS transistors are much better than NMOS transistors at pulling the output high, so you get much better performance by using two transistors.

Jan 12, 2025, 6:27:16 PM

Posted to Reverse engineering CMOS, illustrated with a vintage Soviet counter chip