SN74LS253N

Overview

The SN74LS253N is a dual 4-line to 1-line data selector/multiplexer manufactured by Texas Instruments in the LS logic family. It features two independent multiplexers, each selecting one of four data inputs based on two address lines. The device includes active-low enable inputs and provides 3-state outputs for bus-oriented applications. Packaged in a 16-pin PDIP (N) housing, it operates with standard TTL voltage levels and supports through-hole mounting for reliable integration into digital circuits.

Feature Summary

• Dual independent 4-to-1 multiplexing capability
• 3-state outputs for efficient bus sharing
• Active-low enable control for precise gating

Applications

• Bus-oriented systems requiring data routing
• Industrial control logic switching
• Digital system data selection

Procurement Notes

Verify the manufacturer part number SN74LS253N against official Texas Instruments documentation to ensure authenticity. Confirm the package type is 16-pin PDIP and check for any specific ordering suffixes that may affect electrical characteristics or packaging format. Ensure compatibility with existing circuit designs before procurement.

Selection Notes

Select this component when dual 4-to-1 multiplexing with 3-state outputs is required in a through-hole design. Consider the LS logic family speed and power consumption relative to system needs. Verify voltage level compatibility with interfacing components and ensure adequate thermal management for the operating environment.

Part Context

This component belongs to the Texas Instruments SN74xx series of digital logic integrated circuits. It is part of the multiplexer and data selector category within the broader logic IC portfolio. The SN74LS253N utilizes Low-power Schottky (LS) technology, offering a balance between speed and power dissipation suitable for general-purpose digital applications.

Replacement Considerations

Compatible substitutes include other dual 4-to-1 multiplexers with 3-state outputs from the same logic family, such as the SN74LS153, provided pinout and electrical specifications match. Verify functional equivalence and package compatibility before substitution.