74AC139PC

Overview

The Fairchild Semiconductor 74AC139PC is a dual 1-of-4 decoder/demultiplexer from the AC logic series, housed in a 16-pin Plastic Dual In-Line Package (DIP). It operates within a temperature range of -40 °C to 85 °C and supports a maximum output low current of 0.012 A with a load capacitance of 50 pF. The device contains two independent decoding functions, each capable of selecting one of four outputs based on binary inputs. It complies with RoHS standards and utilizes MS-001 DIP-16 packaging dimensions.

Feature Summary

• Dual independent 1-of-4 decoding functionality integrated into a single package
• Compatible with standard AC logic family voltage levels and interface requirements
• Designed for high-speed digital signal routing and address decoding applications

Applications

• Address decoding in microprocessor-based systems
• Data routing and demultiplexing in digital circuits
• Control signal distribution in industrial automation equipment

Procurement Notes

Verify that the specific part number matches the required DIP-16 package configuration and AC series specifications. Confirm RoHS compliance status and operating temperature range requirements against your system design constraints. Ensure the manufacturer designation aligns with original Fairchild Semiconductor documentation to guarantee functional equivalence and reliability.

Selection Notes

Select this component when dual independent decoding channels are required within a single footprint. The AC series offers higher speed performance compared to HC series alternatives while maintaining CMOS power efficiency. Verify that the 16-pin DIP package fits the target PCB layout and that the electrical characteristics meet the system's drive and load requirements.

Part Context

This component belongs to the 74AC logic family, which provides advanced CMOS technology for improved speed and lower power consumption compared to earlier generations. The 74AC139 specifically addresses applications requiring multiple decoding functions without occupying excessive board space. It serves as a fundamental building block for complex digital logic designs requiring precise signal selection.