SN74LS181N

Specialty Logic Overview

The SN74LS181N is a 4-bit Arithmetic Logic Unit and Function Generator manufactured by Texas Instruments. It operates within the LS logic family using a plastic dual-in-line package with 24 pins. The device supports a supply voltage range of 4.75V to 5.25V and functions at temperatures between 0°C and 70°C. It features independent mode selection for arithmetic or logic operations, parallel data inputs, and four-bit outputs.

Specialty Logic Feature Summary

• Performs 16 distinct arithmetic operations including addition and subtraction
• Executes 16 different logic functions such as AND, OR, and XOR
• Provides independent control over arithmetic and logic modes

Specialty Logic Applications

• Digital arithmetic processing circuits
• Logic function generation systems
• Computer arithmetic units

Specialty Logic Procurement Notes

Verify the component status carefully before procurement. The SN74LS181N is listed as obsolete in official documentation. Confirm availability through authorized distributors or secondary markets. Ensure the specific package variant matches your design requirements. Check for RoHS compliance details if required for modern manufacturing standards.

Specialty Logic Selection Notes

Select this component only when legacy compatibility with the standard LS logic family is required. Verify that the 24-pin PDIP footprint fits the target board layout. Consider power consumption characteristics typical of the LS series. Evaluate if newer logic families meet performance needs while offering better availability.

Specialty Logic Part Context

This part belongs to the SN54/74LS181 series of 4-bit ALUs. It is designed for general-purpose digital applications requiring combined arithmetic and logic capabilities. The SN74 variant indicates commercial temperature range operation. It serves as a foundational building block for early microprocessor designs and educational hardware.

Specialty Logic Replacement Considerations

SN74LS181N3 is an alternative ordering suffix for the same functional device.