The 74LS181 (4-bit Arithmetic Logic Unit)

In this video, I explain the key features and use cases for the 74LS181.

00:00 - Introduction
00:32 - Key Features
01:59 - Breadboard Overview
03:30 - Function Table
04:15 - Logic Operations
07:30 - Arithmetic Operations
13:31 - Subtract Mode
15:05 - Equality Comparison
16:41 - Magnitude Comparison
18:37 - Comparison Overview
19:35 - Open Collector Wiring
21:15 - Improved Function Table
23:14 - Conclusion

The Guy's Channel: @davidcourtney1398

Other References:

[esra_erimez]

I've been fascinated by how CPUs are made. thank you for this interesting video

[rahkemfleming]

This is super neat. I love this format of video

[mohsenheydari]

You really helped me to learn the function of a simple ALU with perfect demonstration. Thanks man.

[awanturnik]

Thank you! It helped me to understand how does it work after dozen incomprehensible papers I looked into. Cheers!

[andreamazzai]

Hi, thank you for your explanation! I've recently recorded a video of the 74LS181 in Italian and hopefully I will publish it in the coming weeks!
May I suggest that you use a microphone to improve audio quality?
Edit: "recently"

[ismailyucel]

How can we design an 8-bit ALU using two 74LS181s?

[justanaveragenormalgamer]

can you give the circuit diagram of the sircuit you use?

[jadonjung]

what does the dec a and shl a mean on the improved datasheet?

[soycereal]

I'm sorry, I'm new to electronics. How do I work with the table on the right side? With the Active High I/o?

[stevenbliss]

I assume this was used in the PDP11/?? mini's?