The 74181 is a 4-bit slice arithmetic logic unit (ALU), implemented as a 7400 series TTL integrated circuit. Introduced by Texas Instruments in February 1970, [1] it was the first complete ALU on a single chip. [2] . It was used as the arithmetic/logic core in the CPUs of many historically significant minicomputers and other devices.

The Current Procedural Terminology (CPT ®) code 74181 as maintained by American Medical Association, is a medical procedural code under the range - Diagnostic Radiology (Diagnostic Imaging) Procedures of the Abdomen.

Part #: 74LS181. Download. File Size: 677Kbytes. Page: 18 Pages. Description: ARITHMETIC LOGIC UNITS/FUNCTION GENERATORS. Manufacturer: Texas Instruments.

The 74181 ALU (arithmetic/logic unit) chip powered many of the minicomputers of the 1970s: it provided fast 4-bit arithmetic and logic functions, and could be combined to handle larger words, making it a key part of many CPUs.

In today’s material, I will tell you about the construction, history and operation of one of the first ALUs. The main role in today’s story will be played by a chip designated 74181. It is a TTL chip enclosed in a 24-pin housing, first presented to the world in early 1970 by Texas Instruments.

The DM74LS181 is a 4-bit high speed parallel Arithmetic DM74LS181 devices. Carry lookahead can be provided at Logic Unit (ALU).

Mar 27, 2017 · One of the more famous of these devices is the 74181, a cascadable 4-bit arithmetic logic unit, or ALU. An ALU is the heart of a microprocessor, performing its operations.

Nov 19, 2017 · And for decades the 74181, as an all-in-one 4-bit ALU on a chip that you might have found in a minicomputer at the turn of the 1970s, represented the most convenient way to teach the operation of...

The 74181 is a 4-bit ALU chip that provides 16 logic functions and 16 arithmetic functions on its operands A and B. Many of the logic functions are what you might expect (AND, OR, XOR), but there are also unusual ones like A OR NOT B.

Jan 7, 2017 · I’ve found some pretty good power point slides showing the basics of half and full adders up to the 74181 circuit itself. Here’s some history of the 74181 that explains why it’s so popular: http://apollo181.wixsite.com/apollo181/about. The 74181 also has it’s own Wiki: https://en.wikipedia.org/wiki/74181. One thing to note is that there ...