CD74AC540M96
Public Made by Adomby adom
Texas Instruments Buffers, Drivers, Receivers, Transceivers, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
Pinout was a 74AC273's, not the CD74AC540's (fixed in 0.1.1)
0.1.0 published a 74AC273 flip-flop pinout (!MR, CP, D0–D7, Q0–Q7) on this part. The CD74AC540 is an octal inverting buffer: pin 1 ~OE1, pins 2–9 A0–A7, pin 10 GND, pins 11–18 ~Y7…~Y0, pin 19 ~OE2, pin 20 VCC.
How it got through: Haiku and Sonnet disagreed, and the Opus 4.8 tie-break backed Haiku's pinout, so it published with two models agreeing on the wrong answer. The datasheet is TI's Chinese-language CD74AC540/541 document.
How it was caught: while profiling Opus 5.5 and Sonnet 5.5 as tie-breakers, both re-read the whole datasheet independently and disagreed with this page. They agree with each other on all 20 pins.
Fixed in 0.1.1: page.json pins, README pin table, a regenerated KiCad symbol, the Fusion .lbr (validated) and the symbol/footprint viewers. Provenance records the correction.