74LS126SC — 4-bit TTL bus driver, still in active production
The Fairchild 74LS126SC is a 4-bit bus driver implemented in standard low-power Schottky TTL logic. It provides four independent three-state buffer stages, each with its own output-enable control, designed for driving bus lines or buffering address/data paths in 5 V logic systems. This part targets general-purpose digital designs in industrial control, test equipment, and legacy 5 V TTL backplanes where fan-out and noise margin matter more than speed.
For high-volume pick-and-place, verify that your feeder setup can handle tube-fed parts, or check whether a tape-and-reel option exists under a different ordering suffix.