74AC02MTCX NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC02MTCX is a quad 2-input NOR gate logic IC manufactured by onsemi in 14-TSSOP surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74AC02 series provides standard logic gating functionality suitable for digital circuit applications requiring NOR gate operations across four independent channels.

Substiute Parts

74AC02MTCX

onsemiIn Stock: 1999374AC02MTCX Datasheet

Current PartRFQ

MC74AC02DTR2G

onsemiIn Stock: 2193MC74AC02DTR2G Datasheet

Parametric EquivalentRFQ

CD74AC02M

Harris CorporationIn Stock: 2035CD74AC02M Datasheet

DirectRFQ

74AHC02PW,118

NXP SemiconductorsIn Stock: 24685174AHC02PW,118 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74AC02MTCX is determined by the following critical parameters:

• Logic Function: All substitutes must implement quad 2-input NOR gate functionality
• Electrical Performance: Supply voltage range, output current capability, and propagation delay must meet or exceed the original specification
• Package Compatibility: Physical form factor and pin count must accommodate board-level integration
• Thermal Range: Operating temperature range must support the application environment

The substitute parts are grouped as follows:

Parametric Equivalent: MC74AC02DTR2G maintains identical logic specifications and 14-TSSOP packaging with active product status and tape & reel availability.

Direct Manufacturer Equivalent: CD74AC02M provides the same logic function in 14-SOIC packaging with extended temperature range (-55°C ~ 125°C) but differs in package form factor and input logic level thresholds.

Similar Series Alternative: 74AHC02PW,118 represents an alternative logic family (AHC vs. AC) with active status and high inventory availability.

Parameter Comparison

Engineering Selection Recommendations

MC74AC02DTR2G is the primary substitute for the 74AC02MTCX. Both parts share identical electrical specifications, the same 14-TSSOP package footprint, and equivalent logic performance. MC74AC02DTR2G holds active product status with established supply chain availability in tape & reel packaging, making it the direct replacement for new designs and production continuity.

CD74AC02M serves as an alternative when extended temperature operation (-55°C ~ 125°C) is required. This part maintains the same logic function and output current specifications but uses 14-SOIC packaging, requiring PCB layout modification. The slower propagation delay (11.5ns vs. 6.5ns) may impact timing-critical applications. CD74AC02M is obsolete; verify long-term availability before selection.

74AHC02PW,118 represents a different logic family (AHC) with active status and substantial inventory. Detailed electrical parameters are not provided in the specification data; full datasheet review is required before substitution to confirm compatibility with supply voltage, timing, and input/output characteristics of the original application.

Frequently Asked Questions (FAQ)

Q: Can MC74AC02DTR2G directly replace 74AC02MTCX without PCB modification?

A: Yes. Both parts use identical 14-TSSOP packaging and pin configuration. No PCB layout changes are required. The tape & reel packaging format (TR) is a supply format difference only and does not affect electrical or mechanical compatibility.

Q: What is the primary reason to substitute the 74AC02MTCX?

A: The 74AC02MTCX is classified as obsolete. MC74AC02DTR2G is the recommended substitute because it maintains active product status, ensuring long-term availability and supply chain stability.

Q: Can CD74AC02M be used in place of 74AC02MTCX?

A: CD74AC02M is functionally equivalent but requires PCB redesign due to 14-SOIC packaging (vs. 14-TSSOP). The extended temperature range (-55°C ~ 125°C) may be beneficial for harsh environments, but the slower propagation delay (11.5ns) must be verified against timing requirements. CD74AC02M is also obsolete.

Q: What are the key differences between 74AC and 74AHC logic families?

A: The 74AC and 74AHC families are distinct logic series with different electrical characteristics. Substitution between families requires full datasheet comparison of supply voltage range, propagation delay, output drive capability, and input threshold levels. Detailed specifications for 74AHC02PW,118 must be reviewed before use.

Q: Is RoHS compliance a factor in selecting a substitute?

A: MC74AC02DTR2G is RoHS3 compliant. CD74AC02M is RoHS non-compliant. If RoHS compliance is a design requirement, MC74AC02DTR2G is the appropriate choice.

Q: What packaging formats are available for the 74AC02 series?

A: The 74AC02MTCX uses 14-TSSOP (tape & reel format available as MC74AC02DTR2G). CD74AC02M uses 14-SOIC. Packaging selection depends on manufacturing equipment and board layout constraints.