SN74LS258BNSR

Overview

The SN74LS258BNSR is a quad 2-line to 1-line data selector/multiplexer with 3-state outputs manufactured by Texas Instruments. It belongs to the SN74LS series, utilizing low-power Schottky logic technology. The device features four independent multiplexing circuits, each selecting between two data inputs based on a common select line. Outputs are designed for bus-oriented systems, providing high-impedance states when disabled. It operates within a supply voltage range of 4.75 V to 5.25 V and supports surface-mount installation in an SOIC-16 package.

Feature Summary

• Quad architecture providing four independent 2-to-1 multiplexing channels
• Three-state output capability suitable for direct bus connection
• Low-power Schottky (LS) logic construction for reduced power dissipation
• Common select lines control all four multiplexers simultaneously

Applications

• Data routing in microprocessor-based systems
• Bus-oriented memory addressing schemes
• Digital signal selection in instrumentation
• Parallel-to-serial conversion interfaces

Procurement Notes

Verify the specific suffix 'BNSR' against the manufacturer's current datasheet to confirm pinout compatibility and package dimensions. Ensure the ordering code matches the required tape-and-reel quantity specifications. Cross-reference the RoHS compliance status with regional regulatory requirements prior to procurement.

Selection Notes

Select this component when designing systems requiring multiple independent data paths controlled by a single address line. The LS series offers a balance of speed and power consumption appropriate for standard TTL environments. Consider the 3-state output feature if the design requires sharing a common data bus among multiple devices without external tri-state buffers.

Part Context

This part is a member of the Texas Instruments SN74LS family, which implements low-power Schottky logic. The SN74LS258 variant specifically addresses applications needing quad multiplexing with high-impedance outputs. It serves as a functional equivalent to other industry-standard quad 2-input multiplexers within the 7400 logic ecosystem.

Replacement Considerations

Compatible substitutes include the SN74LS258N for through-hole applications or the SN74F258 for faster switching speeds. Verify that any replacement maintains the same 16-pin SOIC footprint and electrical characteristics to ensure board-level compatibility.