Overview
The 74F240PC is an 8-channel inverting buffer/line driver with 3-state operation manufactured by Fairchild Semiconductor. This component is designed for applications requiring robust signal buffering, bus isolation, and tri-state multiplexing across a range of digital and industrial systems. The DIP-20 package format ensures compatibility with breadboards, PCBs, and legacy circuit designs.
Key Features
- 8-channel inverting buffer with 3-state outputs
- TTL-compatible logic levels for straightforward integration
- Suitable for bus drivers on microprocessor address and data lines, memory address buffering, clock distribution, line driving for terminated transmission lines, and bus isolation in control systems
- DIP-20 through-hole package for soldering and breadboard prototyping
- Inverting output configuration for signal inversion applications
Technical Specifications
Operating characteristics and electrical parameters conform to TTL/Fairchild 74F-series standards. The device provides adequate output drive for typical digital logic loads and bus structures. Standard operating temperature range is 0–70 °C for commercial-grade units, with extended industrial variants available.
Typical Applications
- Bus drivers and transceivers for microprocessor address and data buses
- Memory address buffering and clock distribution in digital systems
- Line driving for terminated transmission lines and high-fanout logic networks
- Bus isolation and 3-state multiplexing in instrumentation and control systems
- General TTL-level buffering and interfacing in legacy and embedded designs
Compatibility & Replacements
Compatible With
- Standard TTL and CMOS logic circuits operating at 5V nominal
- Breadboards, PCBs, and through-hole soldering applications
- Legacy microprocessor and microcontroller bus architectures
- Digital signal buffering and distribution networks
Replaces / Drop-In Replacement For
- Earlier 74F240 revisions and variants from Fairchild Semiconductor
- Pin-compatible alternatives in the 74-series buffer family (verify pinout with your schematic)
Works With
- TTL-compatible input and output circuits
- Standard 5V digital logic supplies
- Analog and digital test equipment featuring TTL-level I/O
- Circuit simulation software supporting TTL device models
