74HCT02DB,112 Equivalent & Substitute Parts

Part Overview

The 74HCT02DB,112 is a NOR Gate IC with 4 channels and 2 inputs per channel, manufactured by Nexperia USA Inc. in a 14-SSOP surface mount package. This logic gate integrates four independent 2-input NOR functions in a single integrated circuit, operating across a 4.5V to 5.5V supply voltage range with a maximum propagation delay of 19ns at 4.5V with 50pF load.

The main part is currently listed as obsolete. Equivalent and substitute parts are available from active product lines, making substitution necessary for new designs and ongoing production requirements.

Substiute Parts

74HCT02DB,112

Nexperia USA Inc.In Stock: 106874HCT02DB,112 Datasheet

Current PartRFQ

74HCT02PW,118

NXP SemiconductorsIn Stock: 3199574HCT02PW,118 Datasheet

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SN74HCT02APWR

Texas InstrumentsIn Stock: 2147SN74HCT02APWR Datasheet

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SN74HCT02PW

Texas InstrumentsIn Stock: 1283SN74HCT02PW Datasheet

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SN74HCT02PWR

Texas InstrumentsIn Stock: 2775SN74HCT02PWR Datasheet

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74HCT02DB,112

NXP SemiconductorsIn Stock: 622774HCT02DB,112 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HCT02DB,112 is determined by the following criteria:

Functional Equivalence: All substitute parts maintain the same logic function (4-channel 2-input NOR gate), circuit count, input configuration, and base product number (74HCT02).

Electrical Compatibility: All substitutes operate within the same supply voltage range (4.5V ~ 5.5V), maintain identical quiescent current specifications (2 µA maximum), and provide equivalent output drive capability (4mA high and low).

Logic Levels: Input logic thresholds remain consistent across all parts (0.8V low, 2V high), ensuring direct functional replacement in existing circuits.

Package Considerations: Substitutes are available in different surface mount packages (14-SSOP and 14-TSSOP), which are mechanically and electrically compatible for PCB integration, though footprint verification is required.

Compliance: All substitute parts maintain ROHS3 compliance and MSL 1 rating, meeting environmental and handling requirements equivalent to the original part.

Parameter Comparison

Engineering Selection Recommendations

For Active Production: SN74HCT02PWR (Texas Instruments) is the primary recommendation. This part maintains active product status with confirmed inventory availability and meets all electrical and compliance requirements. The 14-TSSOP package offers a smaller footprint than the original 14-SSOP, requiring PCB layout verification.

For NXP Ecosystem Designs: 74HCT02PW,118 (NXP Semiconductors) provides functional equivalence within the NXP product family. This part is active and maintains compatibility with existing NXP-based designs.

For Extended Temperature Range: The original 74HCT02DB,112 specifies -40°C to 125°C operation. Texas Instruments substitutes (SN74HCT02APWR, SN74HCT02PW, SN74HCT02PWR) operate to -40°C to 85°C. Applications requiring the full 125°C upper limit must retain the original part or verify thermal requirements with the substitute.

For Timing-Critical Applications: SN74HCT02APWR exhibits the lowest propagation delay (15ns @ 5.5V, 50pF) among available substitutes, suitable for high-speed logic applications.

Compliance Verification: All substitute parts maintain ROHS3 compliance and MSL 1 rating, meeting standard environmental and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74HCT02DB,112 with SN74HCT02PWR on my PCB?

A: Electrical substitution is direct. However, the package changes from 14-SSOP to 14-TSSOP, requiring PCB footprint verification. The 14-TSSOP is narrower (4.40mm vs 5.30mm width), and pin spacing differs. Consult PCB layout guidelines before implementation.

Q: What is the difference between 74HCT02PW,118 and SN74HCT02PWR?

A: Both parts are functionally equivalent 4-channel 2-input NOR gates with identical electrical specifications. 74HCT02PW,118 is manufactured by NXP Semiconductors, while SN74HCT02PWR is manufactured by Texas Instruments. Selection depends on supply chain availability and design ecosystem preference.

Q: Why does the original part specify -40°C to 125°C while substitutes specify -40°C to 85°C?

A: Operating temperature ranges are manufacturer-specific. If your application requires operation above 85°C, the original 74HCT02DB,112 or equivalent parts with extended temperature ratings must be used. Verify thermal requirements with your system design specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) rating, meeting environmental and handling standards equivalent to the original part.

Q: What packaging options are available for 74HCT02 logic gates?

A: The main part uses 14-SSOP packaging. Substitute parts are available in 14-TSSOP (Texas Instruments) and bulk/tape & reel configurations (NXP). Verify packaging compatibility with your assembly process and PCB design before selection.

Q: Can I use these parts interchangeably in my existing designs?

A: Electrical interchangeability is confirmed across all listed substitutes. Package differences (14-SSOP vs 14-TSSOP) require PCB footprint verification. Consult component datasheets and PCB layout guidelines for mechanical compatibility confirmation.