74ACT158SC

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74ACT158SC is a high-speed CMOS quad 2-input multiplexer belonging to the 74ACT logic series. It features TTL-compatible inputs and provides four independent multiplexing circuits within a single package. The device operates on a single power supply ranging from 4.5V to 5.5V, ensuring compatibility with standard 5V digital systems. Designed for surface-mount applications, it utilizes a 16-pin SOIC (Small Outline Integrated Circuit) package. The component supports data rates suitable for general-purpose digital signal routing and switching tasks in electronic circuits.

Signal Switches, Multiplexers, Decoders Feature Summary

• Integrates four independent 2-to-1 multiplexer channels for compact signal routing
• Features TTL-compatible inputs for direct interfacing with transistor-transistor logic sources
• Provides buffered outputs capable of sourcing and sinking significant drive current
• Operates reliably across a wide industrial temperature range

Signal Switches, Multiplexers, Decoders Applications

• Digital signal selection and routing in communication equipment
• Data acquisition systems requiring multiple input channel switching
• Microprocessor interface circuits for address or data bus management
• General-purpose logic function generation and implementation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific manufacturer origin, as this part number may be produced by onsemi following corporate restructuring. Confirm the package variant matches the required 16-SOIC footprint and pinout specifications. Ensure the revision level aligns with existing design documentation to prevent potential pin configuration discrepancies during integration.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a compact solution for multiple 2:1 signal paths is required without sacrificing drive capability. The ACT series offers superior speed compared to standard AC devices while maintaining low power consumption. Verify that the operating voltage environment strictly adheres to the 4.5V to 5.5V specification to ensure proper logic threshold performance and avoid undefined states.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the widely adopted 74ACT family of logic integrated circuits, which bridges the performance gap between older bipolar technologies and modern CMOS standards. The 74ACT158 specifically addresses the need for efficient data multiplexing in space-constrained printed circuit board designs. Its standardized pinout facilitates drop-in replacements for legacy designs utilizing similar multiplexer architectures.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Compatible substitutes include the 74ACT158PC and 74ACT158SJ. These variants offer identical logical functionality but differ in packaging formats such as Plastic Dual-In-Line or Shrink Small Outline configurations. Verify mechanical fit and thermal requirements before substituting.