SN74ALS151N

Overview

The SN74ALS151N is an 8-line-to-1-line multiplexer belonging to the Texas Instruments ALS (Advanced Low-power Schottky) logic series. It features eight data inputs, three address select lines, and active-low strobe functionality for data gating. The device provides both true and complementary outputs. It operates within a standard voltage range of 4.5 V to 5.5 V and utilizes a 20-pin plastic dual in-line package (PDIP).

Feature Summary

• Provides high-speed data routing by selecting one of eight input channels based on binary address signals.
• Includes active-low enable input to control data transmission and reduce power consumption during idle states.
• Delivers simultaneous true and inverted output signals for flexible logic interfacing.

Applications

• Data acquisition systems requiring channel selection.
• Digital communication interfaces for signal routing.
• Microprocessor-based memory addressing circuits.

Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-20 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors, as environmental declarations may vary by production batch. Ensure the supplier provides valid traceability for this specific logic family component.

Selection Notes

Select this component for designs requiring moderate speed with low power dissipation compared to standard TTL. The ALS series offers improved performance over legacy 74S devices while maintaining pin compatibility. Verify that the required propagation delay and drive current meet the system timing constraints before finalizing the design.

Part Context

This part belongs to the SN74ALS151 family of multiplexers. It serves as a functional equivalent to other industry-standard 8:1 muxes but is distinguished by its Advanced Low-power Schottky technology. The 'N' designation specifically identifies the through-hole plastic dual in-line package format used for prototyping and general-purpose circuit board assembly.

Replacement Considerations

Compatible substitutes include the SN74LS151 for standard speed applications and the SN74HC151 for CMOS compatibility. Verify voltage levels and pin configurations match the existing design requirements before implementing any cross-family replacement.