SN74LS258BD

Overview

The SN74LS258BD is a quadruple 2-line to 1-line data selector/multiplexer featuring three-state outputs, manufactured by Texas Instruments. It belongs to the SN74LS logic series and is housed in a 16-pin SOIC package. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range from 0°C to +70°C. Key electrical characteristics include a propagation delay of 21 ns and a load capacitance of 45 pF. It contains four independent circuits, each functioning as a 2-to-1 multiplexer with active-low enable inputs.

Feature Summary

• Integrates four independent 2-to-1 data selectors within a single package for compact circuit design.
• Provides three-state outputs to facilitate bus-oriented systems and direct connection to data lines.
• Features active-low enable inputs to control data flow and isolate outputs when disabled.

Applications

• Bus-oriented systems requiring data routing
• Data acquisition systems
• Digital communication equipment

Procurement Notes

Verify the specific suffix 'BD' against the manufacturer's current datasheet to confirm the package type (SOIC) and tape-and-reel or tube packaging configuration. Ensure the component meets RoHS compliance requirements if applicable to your assembly process. Cross-reference the ordering part number with official distributor catalogs to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select this component for applications requiring multiple independent 2-to-1 multiplexing functions with high-impedance outputs. The LS logic family offers a balance of speed and power consumption suitable for general-purpose digital logic. Consider the 16-pin SOIC package dimensions for PCB layout constraints. Verify that the system voltage aligns with the specified 4.75 V to 5.25 V range for reliable operation.

Part Context

This component is part of the Texas Instruments SN74LS258 family, which includes variants such as SN74LS258BDR and SN74LS258AN. These devices share the same logical function but differ in packaging, such as SOIC, DIP, or TSSOP, and manufacturing revisions. The SN74LS258BD specifically denotes the SOIC package variant within this product line.

Replacement Considerations

Compatible substitutes include SN74LS258BDR and SN74LS258AN, provided the package style matches the existing footprint. Verify pin compatibility and electrical specifications before substitution.