74F182LC

Overview

The National Semiconductor 74F182LC is a high-speed look-ahead carry generator belonging to the F/FA logic family. Designed for integration with arithmetic logic units, it accelerates carry signal propagation by generating group propagate and group generate signals in parallel. This component operates at a rated supply voltage of 5V and supports a wide operating temperature range from -40°C to 85°C. It utilizes a plastic DIP package with through-hole terminals, facilitating its use in legacy high-speed digital systems requiring fast arithmetic processing capabilities.

Feature Summary

• Generates look-ahead carry signals to accelerate arithmetic operations
• Produces parallel group propagate and group generate outputs
• Compatible with standard 5V CMOS logic families

Applications

• High-speed arithmetic logic unit (ALU) designs
• Fast adder circuits requiring reduced carry propagation delay
• Digital signal processing hardware acceleration modules

Procurement Notes

Verify the specific manufacturer source, as National Semiconductor assets are now managed by Texas Instruments. Confirm the package type matches your PCB footprint requirements. Check current product status, as older F-series components may be discontinued or subject to last-time-buy notices. Ensure compatibility with your system's power supply noise margins and thermal management strategy given the higher current draw typical of this logic family.

Selection Notes

Select this component when system performance requires minimizing carry chain latency in arithmetic operations. Consider the higher power consumption compared to modern low-voltage families like LVC or ALVT. Verify that the 5V operating voltage aligns with the rest of the system logic levels. Evaluate if the through-hole DIP package is necessary or if surface-mount alternatives from newer series are available for the design.

Part Context

This part belongs to the 74F series, known for high speed but higher power consumption. It complements other F-series components such as the 74F181 ALU. The 'LC' suffix typically denotes a specific package variant within the National Semiconductor lineup. As a dedicated carry generator, it serves as a critical building block for constructing multi-bit adders and subtractors without serial carry delays.

Replacement Considerations

• 74F182PC
• 74F182SC

FAQ

What is the primary function of the 74F182LC?

It acts as a look-ahead carry generator to speed up carry signal generation in arithmetic logic units.

Does this component operate at low voltage?

No, it is designed for a 5V supply voltage and draws higher current than modern low-voltage logic families.