74F182PC

Overview

The Fairchild Semiconductor 74F182PC is a high-speed carry lookahead generator housed in a 16-pin DIP package. It operates within a supply voltage range of 4.5V to 5.5V and supports a maximum load capacitance of 50pF. The device features a propagation delay of 9ns at 5V with 50pF loading and draws a maximum static current of 2µA. It functions as a synchronous logic circuit designed for rapid carry signal generation.

Feature Summary

• Provides high-speed carry lookahead generation capabilities
• Designed for synchronous operation with standard TTL loads
• Supports bidirectional counting when paired with compatible ALUs

Applications

• Used with 74F181 or 74F381 arithmetic logic units
• High-speed binary counter circuits
• Digital arithmetic processing systems

Procurement Notes

Verify the specific suffix 'PC' indicates the 16-pin plastic DIP package configuration. Confirm RoHS compliance status if required for assembly, noting that older Fairchild stock may vary. Ensure the source document explicitly lists the part number 74F182PC to avoid confusion with other package variants like SC or J. Check for obsolescence status as this component series may be discontinued.

Selection Notes

Select this component when integrating with 74F181 or 74F381 ALUs to minimize carry propagation delay. The 16-pin DIP format is suitable for through-hole prototyping or legacy board designs. Ensure the system operates within the specified 4.5V to 5.5V range to maintain the 9ns performance metric. Verify that the 50pF load capacitance requirement aligns with the downstream circuitry design.

Part Context

The 74F182 belongs to the Fairchild F/FAST logic family, optimized for speed over power consumption. It serves as a critical complement to 4-bit ALUs by generating group propagate and generate signals. This allows multiple ALUs to operate in parallel without waiting for ripple carry, significantly enhancing computational throughput in digital systems.

Replacement Considerations

Public confirmed substitutes include the 74F182 from other manufacturers adhering to the same pinout and electrical specifications. Cross-reference with 74LS182 only if speed requirements are relaxed, as LS technology is slower. Verify compatibility with existing 74F181 or 74F381 units before substitution.