54F258ADC

Overview

The 54F258ADC is a quad 2-input multiplexer with tri-state outputs, manufactured by National Semiconductor. It belongs to the F/FAST series and features inverted outputs. The device operates in TTL logic families and is housed in a 16-pin Ceramic Dual In-Line Package (CDIP). It provides four independent circuits, each selecting between two data inputs based on control signals. Output drive capabilities include a high current of 3mA and a low current of 20mA.

Feature Summary

• Quad configuration providing four independent 2-to-1 multiplexing channels
• Tri-state output capability for bus-oriented applications
• Inverted output logic function
• Compatible with TTL logic levels

Applications

• Data selection systems requiring multiple input sources
• Bus-oriented digital circuit designs
• Signal routing in fast logic applications

Procurement Notes

Verify the package type is CDIP, as surface mount variants exist within the same family. Confirm the manufacturer origin, noting that Texas Instruments acquired National Semiconductor's logic business. Ensure the part status is active if immediate procurement is required, as legacy logic parts may have limited availability or require specific distributor sourcing.

Selection Notes

Select this component when a quad multiplexer with tri-state outputs and inverted logic is required. It is suitable for TTL-based systems needing fast switching speeds. Compare with non-inverting counterparts like the 74F157 if logic polarity differs. Ensure the CDIP package fits the PCB layout constraints, as plastic DIP or SOIC versions are available under different suffixes.

Part Context

This component is part of the 54F series, which denotes military-grade temperature range compatibility in some contexts, though widely used in commercial industrial applications. It sits alongside similar devices like the 54F257ADM, differing primarily in pinout or packaging. The 54AC258 serves as an AC-speed variant with similar functionality but different electrical characteristics.

Replacement Considerations

Direct substitutes include the 54F257ADM for non-inverting applications. Check for equivalent parts from Texas Instruments, the successor manufacturer. Verify pin compatibility before swapping with other quad multiplexers in the 74F or 54F families.