74AC02MTC NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC02MTC is a quad 2-input NOR gate logic integrated circuit manufactured by onsemi in 14-TSSOP surface mount packaging. This device implements four independent NOR logic functions, each with two inputs, making it suitable for digital logic applications requiring NOR gate functionality.

The 74AC02MTC is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Substiute Parts

74AC02MTC

onsemiIn Stock: 227574AC02MTC Datasheet

Current PartRFQ

MC74AC02DTR2G

onsemiIn Stock: 2193MC74AC02DTR2G Datasheet

DirectRFQ

CD74AC02M

Harris CorporationIn Stock: 2035CD74AC02M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74AC02MTC is determined by the following critical parameters:

• Logic Function: All substitutes must implement quad 2-input NOR gate functionality (4 circuits, 2 inputs per circuit)
• Electrical Compatibility: Supply voltage range, quiescent current, output current, input logic levels, and propagation delay must support the original application requirements
• Mounting Type: Surface mount technology is required
• Package Compatibility: Physical package dimensions must accommodate the PCB layout constraints
• Series Alignment: 74AC logic family consistency ensures timing and electrical characteristics alignment

The identified substitute parts maintain functional equivalence through matching logic architecture and electrical performance within specified operating conditions.

Parameter Comparison

Engineering Selection Recommendations

MC74AC02DTR2G is the primary substitute for the 74AC02MTC. Both parts are manufactured by onsemi, share identical 14-TSSOP packaging, and maintain equivalent electrical specifications including supply voltage range, output current, and propagation delay. The MC74AC02DTR2G is currently in active production status, ensuring long-term availability. The quiescent current specification (4 µA vs. 2 µA) represents a minor increase that does not impact typical application performance. This part is supplied in Tape & Reel packaging format.

CD74AC02M provides functional equivalence with extended operating temperature range (-55°C ~ 125°C) compared to the 74AC02MTC (-40°C ~ 85°C). However, this part uses 14-SOIC packaging rather than 14-TSSOP, requiring PCB layout modification. The propagation delay is increased to 11.5ns at 5V and 50pF load, which may impact timing-critical applications. The CD74AC02M is obsolete and manufactured by Harris Corporation.

Selection should prioritize MC74AC02DTR2G for direct replacement applications requiring identical packaging and active product status. CD74AC02M is suitable only when extended temperature range is required and PCB redesign is feasible.

Frequently Asked Questions (FAQ)

Q: Can MC74AC02DTR2G directly replace 74AC02MTC without PCB modification?

A: Yes. Both parts use identical 14-TSSOP packaging with matching pinout and electrical specifications. No PCB layout changes are required.

Q: What is the significance of the quiescent current difference between 74AC02MTC (2 µA) and MC74AC02DTR2G (4 µA)?

A: The 2 µA difference in maximum quiescent current is negligible for most applications. This specification represents worst-case standby current consumption and does not affect logic operation or output performance.

Q: Is CD74AC02M a suitable replacement for the 74AC02MTC?

A: CD74AC02M provides functional NOR gate equivalence but requires PCB redesign due to different packaging (14-SOIC vs. 14-TSSOP). The increased propagation delay (11.5ns vs. 6.5ns) may affect timing-sensitive circuits. This part is obsolete.

Q: What are the key differences between 14-TSSOP and 14-SOIC packages?

A: 14-TSSOP (Thin Shrink Small Outline Package) has a width of 4.40mm, while 14-SOIC (Small Outline Integrated Circuit) has a width of 3.90mm. These packages have different pin spacing and footprints, requiring separate PCB designs.

Q: Why is MC74AC02DTR2G supplied in Tape & Reel format?

A: Tape & Reel packaging is the standard format for high-volume automated assembly processes. This format improves manufacturing efficiency and is the current production standard for active 74AC02 variants.

Q: Are there compliance or certification differences between the substitute parts?

A: MC74AC02DTR2G is RoHS3 compliant. CD74AC02M is RoHS non-compliant. Both parts are REACH unaffected and classified as EAR99 for export control purposes.