Texas Instruments

SN74F138D

SN74F138D Description

The SN74F138D from Texas Instruments is a high-performance 1-of-8 decoder/demultiplexer integrated circuit (IC) designed for digital logic applications. Housed in a 16-pin SOIC package, it operates within a 4.5V to 5.5V supply range, making it ideal for 5V TTL-compatible systems. This device features a single 3:8 decoding circuit, enabling efficient address decoding or data routing in complex digital designs. With an output current capability of 1mA (high) and 20mA (low), it supports robust signal driving in bus-oriented systems. The SN74F138D is RoHS3 compliant and rated for commercial temperature ranges (0°C to 70°C), ensuring reliability in industrial and consumer electronics.

SN74F138D Features

• Decoder/Demultiplexer Functionality: Converts 3 binary inputs into 8 mutually exclusive outputs, simplifying address decoding.
• High-Speed Operation: Part of the 74F series, offering faster propagation delays compared to standard TTL logic.
• Single-Supply Operation: Works with a 5V power supply, reducing system complexity.
• Strong Output Drive: Capable of sinking 20mA (low state) and sourcing 1mA (high state), suitable for driving multiple loads.
• Surface-Mount Design: 16-SOIC package enables compact PCB layouts in space-constrained applications.
• Low Power Consumption: Optimized for energy-efficient designs.
• REACH Unaffected & RoHS3 Compliant: Meets environmental and regulatory standards.

SN74F138D Applications

• Memory Address Decoding: Ideal for selecting specific memory chips or peripherals in microprocessor-based systems.
• Data Routing: Used in multiplexed bus systems to direct signals to designated channels.
• Industrial Control Systems: Enhances logic-level translation and signal distribution in automation equipment.
• Consumer Electronics: Found in devices requiring efficient digital signal management, such as set-top boxes or gaming consoles.
• Telecommunications: Facilitates signal demultiplexing in communication infrastructure.

Conclusion of SN74F138D

The SN74F138D stands out as a high-speed, reliable decoder/demultiplexer for 5V digital systems. Its strong output drive, compact packaging, and compliance with environmental standards make it a preferred choice for engineers designing memory interfaces, data routing systems, and industrial controls. While it is currently in Last Time Buy status, its performance and versatility ensure continued relevance in legacy and new designs requiring robust logic decoding.