74AHC240 — 20-TSSOP Octal Bus Buffer / Line Driver Key benefits Compact footprint: 20-TSSOP package (0.173" / 4.40 mm width) saves PCB space and fits high-density designs. Reliable performance: Part of the 74AHC logic family, providing high-speed CMOS buffering suitable for demanding digital signal paths. Easy integration: Standard 74AHC device number ensures compatibility with existing 74-series designs and common logic interfaces. Robust temperature range: Operates from -40°C to 85°C (TA), suitable for many industrial and commercial applications. What this product does and why it matters Function: 74AHC240 is an octal buffer/line driver designed to drive and isolate digital bus lines while preserving signal integrity. It provides controlled buffering and three-state output behavior for flexible bus control. Problem solved: Prevents overloading of source devices, reduces noise and signal degradation on shared buses, and enables clean, controlled interfacing between subsystems. Important attributes Base product number: 74AHC240 (standard part identification for design and procurement). Supplier device package: 20-TSSOP for small footprint mounting. Package / case: 20-TSSOP (0.173", 4.40 mm width) — ideal for space-constrained PCBs. Operating temperature: -40°C to 85°C (TA) for stable operation across a broad environment range. Compatibility: Matches established 74AHC logic family standards for straightforward replacements and design reuse. Typical applications / use scenarios Bus buffering on microcontroller or FPGA systems: Use the 74AHC240 to isolate multiple peripheral devices from the main data bus, reducing loading and improving signal timing. PCB designs with limited space: The 20-TSSOP package allows compact placement on small form-factor boards while maintaining full octal buffering capability. Modular digital systems and backplane interfaces: Provide controlled three-state outputs to enable safe bus sharing between modules and prevent contention during hot-plugging or multiplexed operation. Quick specification summary Base Product Number: 74AHC240 Supplier Device Package: 20-TSSOP Package / Case: 20-TSSOP (0.173", 4.40 mm Width) Operating Temperature: -40°C to 85°C (TA) Ordering and design note Use the 74AHC240 when you need a compact, standard octal buffer/driver in a 20-TSSOP package with an industrial temperature range. Verify footprint and thermal considerations for your specific PCB layout and system requirements.