SN74AS27N

Overview

The SN74AS27N is a Triple 3-Input Positive-NOR Gate from the Texas Instruments Advanced Schottky (ALS) logic family. It features a 14-pin PDIP package and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides three independent NOR gates, each with three inputs. Key electrical specifications include a propagation delay of 10 ns, a low-level output current of 8 mA, and a high-level output current of -400 µA. It supports TTL input levels and functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates three independent 3-input positive-NOR logic gates in a single package
• Utilizes Advanced Schottky technology for high-speed switching performance
• Provides robust low-level sink current capability for driving loads
• Compatible with standard TTL input logic voltage levels

Applications

• Digital logic circuit design requiring multiple NOR operations
• Data processing systems utilizing advanced Schottky logic families
• Industrial control interfaces needing reliable gate functionality

Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature grade. Ensure the component matches the required logic family specifications for your application. Confirm RoHS compliance status if environmental regulations apply. Check the manufacturer's latest documentation for any pinout or functional updates before integration into new designs.

Selection Notes

Select this component when high-speed NOR logic is required within the Advanced Schottky family. Compare propagation delays and output drive capabilities against other logic families like LS or ALS. Consider the through-hole packaging requirement for your PCB layout. Evaluate power consumption characteristics relative to system thermal constraints.

Part Context

This part belongs to the SN74AS series, representing Texas Instruments' Advanced Schottky logic line. It offers faster switching speeds than standard TTL while maintaining compatibility. The SN74AS27N specifically addresses applications needing triple 3-input NOR functionality without sacrificing speed.

Replacement Considerations

Direct substitutes include the SN74AS27AD variant for surface mount applications. Other compatible options within the same family may require verification of pin compatibility and electrical parameters.