SN74HC02D Equivalent & Substitute Parts

Part Overview

The SN74HC02D is a 4-channel NOR gate logic IC manufactured by Texas Instruments in 14-SOIC surface mount packaging. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design and production requirements. The 74HC02 series represents a standard logic function across multiple manufacturers, enabling direct functional substitution based on electrical and mechanical parameter alignment.

Substiute Parts

SN74HC02D

Texas InstrumentsIn Stock: 1198SN74HC02D Datasheet

Current PartRFQ

SN74HC02DR

Texas InstrumentsIn Stock: 2161SN74HC02DR Datasheet

DirectRFQ

MC74HC02ADR2G

onsemiIn Stock: 7837MC74HC02ADR2G Datasheet

DirectRFQ

MM74HC02M

Fairchild SemiconductorIn Stock: 3124MM74HC02M Datasheet

DirectRFQ

MM74HC02MX

onsemiIn Stock: 16158MM74HC02MX Datasheet

DirectRFQ

74HC02D,653

Nexperia USA Inc.In Stock: 99031174HC02D,653 Datasheet

UpgradeRFQ

74HC02D-Q100,118

Nexperia USA Inc.In Stock: 327974HC02D-Q100,118 Datasheet

UpgradeRFQ

74HC02D/AUJ

Nexperia USA Inc.In Stock: 78474HC02D/AUJ Datasheet

UpgradeRFQ

MC74HC02ADG

onsemiIn Stock: 2189MC74HC02ADG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC02D is determined by strict equivalence across the following parameters:

Critical Electrical Parameters:

• Logic type (NOR Gate)
• Number of circuits (4)
• Number of inputs per circuit (2)
• Supply voltage range (2V to 6V minimum)
• Output current capability (5.2mA high and low)
• Input logic level thresholds

Critical Mechanical Parameters:

• Package type (14-SOIC)
• Mounting type (Surface Mount)
• Physical dimensions (0.154" width, 3.90mm)

Compliance Parameters:

• RoHS3 compliance
• Moisture sensitivity level (MSL 1)

Parts are grouped into three categories: direct equivalents (identical specifications), upgrades (enhanced specifications within the same package), and manufacturer-recommended alternatives (functionally equivalent with potential performance improvements).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical Specifications): SN74HC02DR is the active equivalent from Texas Instruments with identical electrical performance to the discontinued SN74HC02D. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube). This part maintains full compatibility for designs currently using SN74HC02D.

MM74HC02M and MM74HC02MX are functionally equivalent alternatives from Fairchild Semiconductor and onsemi respectively, with matching electrical specifications and operating temperature range.

Enhanced Performance Alternatives: MC74HC02ADR2G and MC74HC02ADG from onsemi provide improved specifications: reduced quiescent current (1 µA versus 2 µA) and faster propagation delay (13ns versus 15ns). These parts also support an extended operating temperature range (-55°C to 125°C). Both are active products with full RoHS3 compliance.

Extended Temperature Range Options: 74HC02D,653, 74HC02D-Q100,118, and 74HC02D/AUJ from Nexperia USA Inc. extend the operating temperature range to -40°C to 125°C while maintaining standard electrical specifications. The 74HC02D-Q100,118 variant includes AEC-Q100 automotive qualification.

All substitute parts maintain 14-SOIC packaging, surface mount mounting type, RoHS3 compliance, and MSL 1 rating, ensuring mechanical and environmental compatibility with the original SN74HC02D.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HC02DR as a direct replacement for SN74HC02D? A: Yes. SN74HC02DR is electrically and functionally identical to SN74HC02D. The difference is packaging format: SN74HC02DR is supplied in Cut Tape & Digi-Reel format instead of Tube. Both use 14-SOIC packaging and are compatible with identical PCB layouts.

Q: What is the advantage of MC74HC02ADR2G over SN74HC02D? A: MC74HC02ADR2G offers lower quiescent current consumption (1 µA versus 2 µA), faster propagation delay (13ns versus 15ns), and extended operating temperature range (-55°C to 125°C versus -40°C to 85°C). These improvements make it suitable for applications requiring lower power consumption or operation in wider temperature environments.

Q: Are all substitute parts in 14-SOIC packaging? A: All listed substitute parts use 14-SOIC (0.154", 3.90mm Width) packaging and surface mount mounting type, ensuring compatibility with existing PCB designs for SN74HC02D.

Q: What does AEC-Q100 qualification mean for 74HC02D-Q100,118? A: AEC-Q100 is an automotive qualification standard. The 74HC02D-Q100,118 variant meets automotive industry reliability and quality requirements, making it suitable for automotive applications requiring this certification.

Q: Do all substitute parts have the same RoHS compliance status? A: Yes. All listed substitute parts are ROHS3 compliant and have MSL 1 (Unlimited) moisture sensitivity level, matching the environmental compliance of the original SN74HC02D.

Q: Can I mix different manufacturers' parts in the same design? A: Yes. All substitute parts meet identical electrical specifications for the 74HC02 NOR gate function and use the same 14-SOIC package. They are functionally interchangeable within the specified electrical parameters.

Q: Which substitute should I choose for new designs? A: For new designs, MC74HC02ADR2G or MC74HC02ADG are recommended due to improved performance specifications (lower power, faster propagation delay) and extended temperature range, while maintaining full compatibility with the 74HC02 logic function.