SN74F27N

Overview

The SN74F27N is a triple 3-input NOR gate from the Texas Instruments 74F series. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible inputs and outputs. The device provides three independent logic channels in a 14-pin PDIP package. Key electrical characteristics include a maximum propagation delay of 8 ns, a high-level output current of -1 mA, and a low-level output current of 20 mA. It supports through-hole mounting and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Contains three independent 3-input NOR logic gates
• Features TTL-compatible input and output levels
• Provides fast switching performance with low propagation delay

Applications

• Digital logic circuit design
• Computer peripheral interfaces
• Control systems requiring multiple NOR operations

Procurement Notes

Verify the specific manufacturer datasheet for the SN74F27N to confirm pinout compatibility and electrical limits before integration. Ensure that the procurement source provides original component documentation to validate authenticity. Cross-reference the ordering information with official Texas Instruments records to avoid counterfeit parts. Confirm that the package type matches the required PCB footprint specifications.

Selection Notes

Select this component when a design requires multiple independent NOR gates within a single integrated circuit. The 74F series offers faster switching speeds compared to standard 74LS equivalents. Verify that the system power supply remains stable between 4.5 V and 5.5 V. Consider the 14-pin DIP package constraints for board layout and thermal management requirements during the selection process.

Part Context

This part belongs to the Texas Instruments 74F (Fast) logic family, known for improved speed over earlier standards. The SN74F27N specifically implements the NOR function, which is fundamental in digital logic for creating complex combinational circuits. It serves as a direct replacement for similar devices in legacy designs while offering enhanced performance metrics suitable for modern digital applications.

Replacement Considerations

Compatible substitutes include the SN74S27N for Schottky-clamped performance or the SN74LS27N for lower power consumption. Verify pin compatibility and electrical parameters against the original design requirements before substitution.