SN74ALS27ADR

Overview

The SN74ALS27ADR is a Texas Instruments logic gate featuring three independent 3-input NOR functions. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a low-level output current of 8 mA with a high-level output current of -400 uA. The device exhibits a propagation delay of 15 ns and functions reliably between 0°C and +70°C. Packaged in an SOIC-14 surface-mount format, it belongs to the ALS logic series designed for high-speed digital applications.

Feature Summary

• Integrates three independent 3-input NOR gates within a single package
• Utilizes Advanced Low-power Schottky (ALS) technology for optimized speed and power consumption
• Provides robust drive capability with an 8 mA low-level output current

Applications

• Digital logic circuit design requiring multi-input NOR functionality
• High-speed data processing systems utilizing ALS logic families
• Industrial control interfaces operating within standard temperature ranges

Procurement Notes

Verify the specific suffix 'ADR' against official datasheets to confirm the SOIC-14 package and tape-and-reel packaging configuration. Ensure compatibility with 4.5 V to 5.5 V supply rails and validate that the 15 ns propagation delay meets system timing requirements before integration into final designs.

Selection Notes

Select this component when designing circuits requiring multiple 3-input NOR operations without consuming excessive board space. The ALS series offers a balance of switching speed and power efficiency suitable for general-purpose digital logic. Confirm that the SOIC-14 footprint aligns with existing PCB layout constraints and thermal management strategies.

Part Context

This part belongs to the SN74ALS27A family of triple 3-input NOR gates manufactured by Texas Instruments. The ALS series represents an evolution in TTL-compatible logic, providing faster switching speeds than standard LS counterparts while maintaining lower power dissipation. The 'ADR' designation specifically identifies the surface-mount variant housed in a 14-pin small-outline integrated circuit package.

Replacement Considerations

Cross-reference with other SN74ALS27A variants such as SN74ALS27AN for through-hole mounting options or SN74ALS27ANSR for alternative reel quantities. Verify pinout compatibility and electrical specifications match exactly before substituting components in existing assemblies.