74HC/LS138 2–6V Low Power 3-to-8 Line Decoder/Demultiplexer IC | Low Current, DIP/SOP Package | Xinbole

The 74HC/LS138 is a high-performance 3-to-8 line decoder and demultiplexer IC designed for efficient digital address decoding and signal routing applications. It combines High-Speed CMOS (HC) and Low-Power Schottky TTL (LS) technologies to deliver fast switching speed, low power consumption, and high noise immunity, making it ideal for modern digital and embedded systems.

The LS technology variant incorporates Schottky diode clamping to reduce transistor saturation delay, while the HC version offers ultra-low quiescent current and wide voltage compatibility from 2V to 6V. This provides a clear voltage advantage over traditional TTL-only decoder series, ensuring better power efficiency and flexible integration in mixed-voltage environments.

With optimized internal architecture, the 74HC/LS138 ensures stable thermal performance, reliable long-term operation, and consistent decoding accuracy even in high-speed logic circuits. It is available in both DIP and SOP packages, supporting both prototyping and compact PCB designs for mass production.

Key Features

• 3-to-8 line decoding and demultiplexing function
• Operating voltage range: 2V to 6V (HC), 5V TTL compatible (LS)
• Low power consumption with high-speed operation
• Schottky TTL technology for reduced propagation delay
• High noise immunity and stable logic performance
• Available in DIP and SOP packages
• Excellent thermal stability and reliability

Applications

• Memory address decoding systems
• Microprocessor and microcontroller interfacing
• Data routing and signal distribution circuits
• Industrial control and automation systems
• Digital logic design and combinational circuits
• Embedded systems and communication equipment
• General-purpose digital electronics applications