Product Overview: NXP 74F138 1-of-8 Decoder/Demultiplexer

The NXP 74F138 is a high-performance, fast-switching 1-of-8 decoder/demultiplexer designed for use in high-speed memory decoding or data routing applications. This integrated circuit is an essential component for systems that require the conversion of a binary-coded input into one of eight mutually exclusive outputs.

Key Features

• Logic Family: 74F
• Operation Mode: 1-of-8 Decoder/Demultiplexer
• Supply Voltage Range: 4.5V to 5.5V
• High-Speed Performance: Typical propagation delay time of 4.5ns
• Power Dissipation: Low power consumption, with a typical I<sub>CC of 8mA
• Output Capability: Capable of driving 15 LSTTL loads
• Input Compatibility: Compatible with TTL logic levels
• Packaging: Available in various packages including DIP and SOIC

Functional Description

The NXP 74F138 decodes a three-bit Address input (A0, A1, A2) to activate one of the eight mutually exclusive outputs when the Enable inputs (E1, E2, and G) are appropriately configured. The device features three Enable inputs: two active LOW (E1, E2) and one active HIGH (G). When the Enable inputs are correctly set, the selected output will go LOW, and the remaining outputs will stay HIGH.

Applications

The versatility of the 74F138 makes it suitable for a wide range of applications such as:

• Memory chip select decoding
• Data routing and multiplexing
• Control interface for microprocessors
• Function generation
• Instrumentation and test equipment

Quality and Reliability

NXP Semiconductors is known for its commitment to quality and reliability. The 74F138, like all NXP products, undergoes rigorous testing and quality control procedures to ensure it meets the industry standards for performance and durability.