74AC02SC NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC02SC is a 4-channel 2-input NOR gate logic IC manufactured by onsemi in 14-SOIC surface mount packaging. This part is classified as obsolete, making substitute parts necessary for new designs and production continuity. The 74AC02 series provides standard logic gating functionality across the 74AC family of advanced CMOS logic circuits. Equivalent and substitute parts maintain the same logic function and pin configuration while offering different packaging options, manufacturers, or enhanced specifications.

Substiute Parts

74AC02SC

onsemiIn Stock: 196374AC02SC Datasheet

Current PartRFQ

MC74AC02DR2G

onsemiIn Stock: 4250MC74AC02DR2G Datasheet

DirectRFQ

MC74AC02DG

onsemiIn Stock: 4946MC74AC02DG Datasheet

Parametric EquivalentRFQ

CD74AC02M

Harris CorporationIn Stock: 2035CD74AC02M Datasheet

SimilarRFQ

CD74AC02M96

Texas InstrumentsIn Stock: 6034CD74AC02M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC02SC is determined by the following critical parameters: logic function (NOR gate), circuit count (4 channels), input count (2 inputs per gate), supply voltage range, output current capability, propagation delay, and package type (14-SOIC). All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional and physical compatibility.

The substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (onsemi): Parts that maintain identical electrical specifications and are manufactured by the original supplier, differing only in packaging format (Tape & Reel vs. tube).

Cross-Manufacturer Equivalents: Parts from alternative manufacturers (Texas Instruments, Harris Corporation) that provide the same logic function and package but may have extended temperature ranges or different compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

For new designs requiring active product status and RoHS3 compliance: MC74AC02DR2G (Tape & Reel) or MC74AC02DG (Tube) are the primary recommendations. Both are manufactured by onsemi with active product status and maintain the original 74AC02SC electrical specifications while offering ROHS3 compliance.

For applications requiring extended temperature range (-55°C to 125°C): CD74AC02M96 from Texas Instruments provides active product status, ROHS3 compliance, and extended operating temperature specifications. This part exhibits slightly higher propagation delay (11.5ns vs. 6.5ns) and operates across a wider supply voltage range (1.5V ~ 5.5V).

For legacy system maintenance where original specifications are critical: CD74AC02M from Harris Corporation maintains compatibility but carries obsolete product status and RoHS non-compliance, limiting its use to repair and maintenance applications only.

Frequently Asked Questions (FAQ)

Q: Can MC74AC02DR2G and MC74AC02DG be used interchangeably with 74AC02SC?

A: Yes. Both parts are electrically equivalent to 74AC02SC, maintaining identical supply voltage range (2V ~ 6V), output current (24mA), and propagation delay (6.5ns @ 5V, 50pF). The difference is packaging format: MC74AC02DR2G is supplied in Tape & Reel format, while MC74AC02DG is supplied in Tube format. Both are pin-compatible 14-SOIC packages.

Q: What is the difference between the onsemi parts (MC74AC02DR2G, MC74AC02DG) and the Texas Instruments part (CD74AC02M96)?

A: The onsemi parts maintain the original 74AC02SC specifications exactly. The Texas Instruments CD74AC02M96 has a wider supply voltage range (1.5V ~ 5.5V vs. 2V ~ 6V), extended operating temperature range (-55°C ~ 125°C vs. -40°C ~ 85°C), and higher propagation delay (11.5ns vs. 6.5ns). CD74AC02M96 is suitable for applications requiring extended temperature operation but may not be suitable for designs optimized for the faster 6.5ns propagation delay.

Q: Are all substitute parts ROHS3 compliant?

A: MC74AC02DR2G, MC74AC02DG, and CD74AC02M96 are ROHS3 compliant. CD74AC02M from Harris Corporation is RoHS non-compliant and should not be used in new designs subject to RoHS regulations.

Q: What packaging options are available?

A: All substitute parts use 14-SOIC surface mount packaging (0.154", 3.90mm width). Packaging format differs: MC74AC02DR2G is supplied in Tape & Reel (TR), MC74AC02DG in Tube, and CD74AC02M96 in Cut Tape (CT) & Digi-Reel format. The physical package dimensions are identical across all parts.

Q: Is the 74AC02SC still available?

A: The 74AC02SC is classified as obsolete. MC74AC02DR2G and MC74AC02DG from onsemi are active products with equivalent specifications and are the recommended replacements for new production.