SN74AHCT02DG4

Overview

The SN74AHCT02DG4 is a quadruple 2-input positive-NOR gate manufactured by Texas Instruments. It belongs to the AHCT logic family, designed for high-speed CMOS operation with TTL-compatible inputs. The device operates within a supply voltage range of 4.5 V to 5.5 V and features low power consumption. It is housed in a 14-pin Small Outline Integrated Circuit (SOIC) package. The component supports an operating temperature range from -40°C to 85°C and includes overvoltage protection on inputs.

Feature Summary

• TTL-compatible input levels enable direct interfacing with standard TTL logic devices without additional level shifting circuitry.
• High-speed CMOS technology provides fast propagation delays while maintaining low static power dissipation.
• Overvoltage protection allows safe operation when inputs exceed the supply voltage limits.

Applications

• Digital signal processing systems requiring NOR logic functions
• Microcontroller-based embedded control units
• Consumer electronics logic circuits

Procurement Notes

Verify the specific ordering suffix DG4 confirms lead-free status and RoHS compliance as per manufacturer specifications. Confirm the SOIC-14 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your system's environmental conditions. Check for any recent lifecycle notices or obsolescence warnings directly from Texas Instruments before finalizing procurement plans.

Selection Notes

Select this component when TTL-compatible inputs are required alongside high-speed CMOS performance. The AHCT series is suitable for applications needing noise immunity and low power consumption. Consider the SOIC-14 package for surface-mount assembly constraints. Verify that the 4.5 V to 5.5 V supply voltage aligns with your system's power rails.

Part Context

This part is part of the SN74AHCT02 series of quad 2-input NOR gates. It shares functional compatibility with other members of the AHCT family but differs in packaging and specific suffix designations. The DG4 suffix typically indicates a lead-free, RoHS-compliant variant in the SOIC package. It serves as a digital logic solution for general-purpose computing and control applications.

Replacement Considerations

Direct pin-to-pin replacements may include other SN74AHCT02 variants with different suffixes indicating package or compliance changes. Cross-referencing with other manufacturers' 74AHCT02 equivalents requires verifying voltage ranges and input thresholds. Always confirm electrical characteristics match the original specification before substitution.