74ACT02SC NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74ACT02SC is a quad 2-input NOR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The 74ACT02 series provides standard logic gating functionality suitable for digital circuit design requiring NOR gate operations with TTL-compatible voltage levels.

Substiute Parts

74ACT02SC

onsemiIn Stock: 212974ACT02SC Datasheet

Current PartRFQ

MC74ACT02DR2G

onsemiIn Stock: 2881MC74ACT02DR2G Datasheet

DirectRFQ

MC74ACT02DG

onsemiIn Stock: 1868MC74ACT02DG Datasheet

Parametric EquivalentRFQ

CD74ACT02M

Harris CorporationIn Stock: 3501CD74ACT02M Datasheet

SimilarRFQ

CD74ACT02M96

Harris CorporationIn Stock: 1591CD74ACT02M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ACT02SC is determined by strict equivalence across the following critical parameters: logic type (NOR gate), circuit count (4 channels), input count (2 inputs per gate), supply voltage range (4.5V ~ 5.5V), output current capability (24mA), input logic thresholds (0.8V low / 2V high), and package type (14-SOIC surface mount). All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Differences in product status, packaging format (Tape & Reel, Tube, Bulk), manufacturer, and operating temperature range are noted but do not affect functional substitution within the specified parameter set.

Parameter Comparison

Engineering Selection Recommendations

For new production designs, MC74ACT02DR2G (Tape & Reel) or MC74ACT02DG (Tube) are preferred substitutes. Both are manufactured by onsemi with active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment. These parts maintain identical electrical performance to the 74ACT02SC with matching propagation delay specifications.

CD74ACT02M and CD74ACT02M96 (Harris Corporation) are parametric equivalents with identical core electrical specifications but exhibit longer propagation delay (12.2ns versus 9.5ns) and extended operating temperature range (-55°C ~ 125°C). These parts are obsolete and RoHS non-compliant, making them suitable only for legacy system maintenance where existing inventory exists and regulatory compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT02DR2G replace 74ACT02SC directly? A: Yes. MC74ACT02DR2G is a direct functional equivalent with identical electrical specifications, supply voltage, output current, input thresholds, and propagation delay. The difference is packaging format (Tape & Reel versus unspecified) and active product status.

Q: What is the difference between MC74ACT02DR2G and MC74ACT02DG? A: Both are onsemi active products with identical electrical specifications. The difference is packaging format: MC74ACT02DR2G is supplied in Tape & Reel format for automated assembly, while MC74ACT02DG is supplied in Tube format for manual handling.

Q: Can CD74ACT02M be used as a substitute? A: CD74ACT02M is a parametric equivalent with the same logic function and supply voltage. However, it has longer propagation delay (12.2ns versus 9.5ns), extended operating temperature range, and is RoHS non-compliant. Use only if timing specifications allow the longer delay and regulatory compliance is not required.

Q: Are all substitute parts in 14-SOIC packaging? A: Yes. All listed substitute parts use 14-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring mechanical and pin compatibility with the 74ACT02SC.

Q: What does "ROHS3 Compliant" mean for MC74ACT02 parts? A: ROHS3 Compliant indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting lead and other hazardous materials. This is required for many commercial and industrial applications.

Q: Why is propagation delay different for Harris Corporation parts? A: CD74ACT02M and CD74ACT02M96 specify 12.2ns propagation delay compared to 9.5ns for onsemi parts. This difference is within the 74ACT logic family specification but may affect timing-critical applications.