74LS182 Carry Lookahead Adder Generator IC | Datasheet

The SN54S182 and 74LS182 are high-speed, look-ahead carry generators capable of anticipating a carry across four binary adders or a group of adders. They are cascadable to perform full look-ahead across n-bit adders. Carry, generate-carry, and propagate-carry functions are provided as enumerated in the pinout table. The output of the 74LS182 IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC 74LS182 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.

What is a Carry Lookahead Adder?

A carry-lookahead adder can be considered as a fast parallel adder that reduces the propagation delay by adding more complex hardware, thus increasing its operational cost. In a carry-lookahead adder, the carry logic over fixed groups of bits of the adder is reduced to two-level logic, which is simply a transformation of the ripple carry design. There are a number of advantages of the carry-lookahead adder, for one it reduces the propagation delay by the addition of high-speed adder blocks & secondly it provides a much faster addition logic.

74LS182 Pinout

74LS182 Pin Description

Pin No.	Pin Name	Description
1	G1′	Active Low Carry Generate Input G1′
2	P1′	Active Low Carry Propagate Input P1′
3	G0′	Active Low Carry Generate Input G0′
4	P0′	Active Low Carry Propagate Input P0′
5	G3′	Active Low Carry Generate Input G3′
6	P3′	Active Low Carry Propagate Input P3′
7	P’	Carry Propagate Output P’
8	GND	Ground Pin
9	Cn+z	Carry Output Cn+z
10	G’	Carry Generate Output G’
11	Cn+y	Carry Output Cn+y
12	Cn+x	Carry Output Cn+x
13	Cn	Carry Input Cn
14	G2′	Active Low Carry Generate Input G2′
15	P2′	Active Low Carry Propagate Input P2′
16	Vcc	Chip Supply Voltage

74LS182 Key Features & Specifications

• Technology Family: LS
• Rating: Catalog
• VCC (min): 4.75V
• VCC (max): 5.25V
• The frequency at nominal voltage: 35 MHz
• Provides Lookahead Carries Across a Group of Four ALUs
• Multi-level Lookahead High-speed Arithmetic Operation Over Long
• Word Lengths
• Typical propagation delay: 21nS
• Low power consumption: 32mW
• Operating temperature: 0ºC to 70ºC
• ESD protection

Applications

• A vital component used for embedding adder circuits in digital devices such as laptops, personal computers, radio equipment, etc.

You can download this Datasheet for 74LS182 Carry Lookahead Generator IC Datasheet from the link given below:

See Also: 74LS153 Dual 4 To 1 Line Multiplexer IC – Datasheet | 74LS155 Dual 2-Bit Binary Decoder/Demultiplexer IC – Datasheet | 74LS11 Triple 3 – Input AND Logic Gate IC – Datasheet