What this part is and where it fits
The Texas Instruments CD74ACT240E is an octal buffer and line driver with inverting outputs and 3-state capability, built on the 74ACT advanced CMOS logic family. It contains two independent elements, each handling four bits, with symmetrical 24 mA source and sink drive. The 4.5 V to 5.5 V supply range places it firmly in 5 V logic systems — not a 3.3 V part. Packaged in a through-hole 20-pin DIP (0.300" wide, 7.62 mm pitch), it is suited for breadboard prototyping, legacy bus interface cards, and industrial control panels where DIP sockets simplify field replacement.
Industrial temperature range and deployment context
Rated for -40°C to 85°C ambient, the CD74ACT240E covers the industrial temperature grade. This makes it a fit for factory automation cabinets, outdoor telecom equipment, and motor drive interfaces where the board sees seasonal temperature swings but not the full -55°C military floor.
Sourcing and lifecycle
The CD74ACT240E is listed as Active in production. For BOM lines requiring a through-hole 5 V buffer/inverter, this part is a straightforward call — no last-time-buy risk, no legacy-surplus dependency.