74ACT258SC

Signal Switches, Multiplexers, Decoders Overview

The Fairchild Semiconductor 74ACT258SC is a quad 2-input multiplexer featuring 3-STATE outputs, designed for high-speed CMOS logic applications. It operates within a supply voltage range of 4.5V to 5.5V and supports output drive currents of 24mA for both high and low states. The device utilizes a common data select input to choose between two data sources for four independent bits. Packaged in a 16-pin SOIC format, it functions reliably across an operating temperature range of -40°C to 85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Quad configuration providing four independent 2-to-1 multiplexing channels
• 3-STATE output capability for effective bus interfacing and isolation
• Common data select input simplifies control logic for multi-bit selection

Signal Switches, Multiplexers, Decoders Applications

• Data bus routing in digital systems
• Signal source selection in measurement equipment
• Address/data line multiplexing in microprocessor interfaces

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the obsolete status with the manufacturer or authorized distributors before procurement planning. Confirm package integrity and pin compatibility during integration. Ensure supply chain alternatives are identified due to discontinuation. Validate RoHS compliance documentation for regulatory adherence. Check for cross-reference availability from ON Semiconductor if direct sourcing is unavailable.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when a quad 2-input multiplexer with tri-state outputs is required for 5V logic systems. Ensure the application voltage remains within the 4.5V to 5.5V range for optimal performance. Consider the 24mA drive strength for load requirements. Verify that the SOIC-16 package fits the PCB layout constraints. Evaluate thermal management needs for the specified operating temperature range.

Signal Switches, Multiplexers, Decoders Part Context

The 74ACT258 belongs to the 74ACT series of high-speed CMOS logic devices, known for TTL-compatible inputs and speeds approaching those of LS-TTL. This specific part number represents the SC variant in a 16-pin Small Outline Integrated Circuit (SOIC) package. It is part of a broader family of signal switching components produced by Fairchild Semiconductor, now often associated with ON Semiconductor following corporate acquisitions.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Check for equivalents such as the 74ACT258MX or other quad 2:1 multiplexers with 3-STATE outputs from compatible manufacturers. Verify pinout compatibility and electrical specifications before substitution.