# SN74LS181N (Component) ## Description Arithmetic Logic Unit IC 24-PDIP The SN74LS181N is a high-speed, 4-bit arithmetic logic unit (ALU) designed for digital computing and logic operations in microprocessor, computer, and embedded system applications. It integrates a full set of arithmetic and logical functions, including addition, subtraction, AND, OR, XOR, and comparison operations, in a single package. The device features fast switching times, TTL-compatible inputs, and outputs suitable for cascading multiple units for extended-bit operations. Its robust design ensures reliable digital processing across a wide operating voltage and temperature range, making it ideal for educational computing systems, programmable logic devices, industrial controllers, and digital signal processing circuits. Engineering Specifications Manufacturer: Texas Instruments Part Number: SN74LS181N Device Type: 4-Bit Arithmetic Logic Unit (ALU) Logic Family: LS-TTL (Low-Power Schottky TTL) Functionality: Arithmetic and Logical Operations (Add, Subtract, AND, OR, XOR, Compare) Data Width: 4 Bits Inputs: TTL-Compatible Logic Inputs Outputs: TTL-Compatible Logic Outputs Carry Handling: Lookahead Carry Support for High-Speed Operation Propagation Delay: Fast Switching for Digital Computation Power Supply: Standard TTL Supply Voltage Package Type: Dual In-Line Package (DIP) Mounting Style: Through-Hole Operating Temperature Range: Commercial/Industrial Grade RoHS Compliant: Yes Applications: Digital Computing, Educational Microprocessor Systems, Industrial Control, Programmable Logic Circuits, Digital Signal Processing, Embedded Computing, Logic Design Learning Kits Key Features 4-bit wide ALU with full arithmetic and logic operations TTL-compatible inputs and outputs for easy integration Fast switching speed for high-performance digital systems Supports cascading for multi-bit operations Lookahead carry capability for efficient addition/subtraction Robust and reliable operation across standard voltage and temperature ranges Compact dual in-line package suitable for through-hole PCB mounting Ideal for embedded systems, educational projects, and industrial logic applications #SN74LS181N #TexasInstruments #ALU #ArithmeticLogicUnit #DigitalElectronics #TTL #LS_TTL #DigitalComputing #EmbeddedSystems #IndustrialElectronics #LogicDesign #MicroprocessorInterface #ProgrammableLogic #SignalProcessing #ThroughHole #ElectronicComponents #PCBDesign #HighSpeedLogic #DigitalCircuit ## Component Details - **Owner:** adrian95 - **Created:** 6/6/2026 - **Last Updated:** 6/6/2026 - **Visibility:** Public - **Symbol Style:** parametric-v1 - **Datasheet URL:** https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1006/SN54%28LS%2CS%29181%2CSN74%28LS%2CS%29181.pdf - **Part Type:** Integrated Circuit - **Manufacturer Part Number:** SN74LS181N - **Mount:** Through Hole - **Manufacturer Name:** Texas Instruments ## Distributor Pricing (qty 1) *Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.* | Distributor | Unit Price (qty 1) | Stock | |------------|--------------------|-------| | [Digi-Key](https://www.digikey.com/en/products/detail/texas-instruments/SN74LS181N/1594771) | N/A | N/A | | [Mouser](https://www.mouser.com/ProductDetail/Texas-Instruments/SN74LS181N?qs=RnzODY3cU8vmP%2FMAZaDwJg%3D%3D) | N/A | N/A | | [Verical](https://www.verical.com/pd/texas-instruments-arithmetic---alu-SN74LS181N-189638?utm_currency=USD) | N/A | N/A | - **Part Type:** Integrated Circuits - **Sub-Type:** Logic - **Manufacturer:** Texas Instruments - **MPN:** SN74LS181N - **Mount Type:** Through Hole - **Package / Case Code:** PDIP - **Pin Count:** 24 - **Logic Function:** AND - **Compliance:** Rohs ## Pins | Pin | Name | Type | |-----|------|------| | 1 | ~B0 | | | 2 | ~A0 | | | 3 | S3 | | | 4 | S2 | | | 5 | S1 | | | 6 | S0 | | | 7 | CN | | | 8 | M | | | 9 | ~F0 | | | 10 | ~F1 | | | 11 | ~F2 | | | 12 | GND | | | 13 | ~F3 | | | 14 | A=B | | | 15 | ~P | | | 16 | CN+4 | | | 17 | ~G | | | 18 | ~B3 | | | 19 | ~A3 | | | 20 | ~B2 | | | 21 | ~A2 | | | 22 | ~B1 | | | 23 | ~A1 | | | 24 | VCC | | --- *Generated from [https://www.flux.ai/adrian95/sn74ls181n](https://www.flux.ai/adrian95/sn74ls181n)*