SN74F27D

Overview

The SN74F27D is a high-speed TTL logic device manufactured by Texas Instruments, housed in a 14-pin Small Outline Integrated Circuit (SOIC) package. It contains three independent 3-input positive NOR gates. The component operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from 0°C to +70°C. Electrical characteristics include a maximum propagation delay of 7 ns and a maximum power supply current of 12 mA at nominal voltage.

Feature Summary

• Contains three independent 3-input positive NOR gates for complex logic implementation
• High-speed performance suitable for fast switching applications
• Compatible with standard TTL logic families

Applications

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

Procurement Notes

Verify the package type matches the required 14-SOIC footprint. Confirm the suffix 'D' indicates the specific tape-and-reel or tube packaging variant if applicable to the procurement channel. Ensure the manufacturer is Texas Instruments to guarantee specified electrical parameters. Check for RoHS compliance status if required by the assembly process.

Selection Notes

Select this component when three independent 3-input NOR gates are required in a single package. Consider the SOIC-14 form factor for surface-mount assembly constraints. Evaluate the 7 ns propagation delay against system timing requirements. Compare against other F-series logic devices if different input counts or gate types are needed.

Part Context

This part belongs to the SN74F series of high-speed TTL logic ICs. It serves as a digital logic building block for implementing Boolean NOR functions. The device is designed for general-purpose digital applications where speed and reliability are prioritized over low power consumption typical of LS or HC series alternatives.

Replacement Considerations

Direct substitutes may include other SN74F27 variants from Texas Instruments or equivalent parts from manufacturers like ON Semiconductor or NXP, provided pinouts and electrical specifications match exactly.