74HCT02DB,118 NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74HCT02DB,118 is a 4-channel 2-input NOR gate logic IC manufactured by Nexperia USA Inc. in 14-SSOP surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates within the 4.5V to 5.5V supply voltage range and is suitable for digital logic applications requiring NOR gate functionality.

Substiute Parts

74HCT02DB,118

Nexperia USA Inc.In Stock: 97974HCT02DB,118 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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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT02DB,118 is determined by the following critical parameters:

• Logic function: 4-channel 2-input NOR gate
• Supply voltage range: 4.5V ~ 5.5V
• Output current capability: 4mA high and low
• Input logic levels: 0.8V low, 2V high
• Quiescent current: 2 µA maximum
• RoHS3 compliance and MSL Level 1 rating
• Base product number: 74HCT02

Substitute parts must maintain functional equivalence across these parameters. Package variations (SSOP vs. TSSOP) and product status differences are noted but do not prevent substitution when electrical specifications align.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain electrical equivalence with the 74HCT02DB,118 across core functional parameters: logic type, circuit count, input count, supply voltage, quiescent current, output current, and input logic levels. All parts are ROHS3 compliant with MSL Level 1 rating.

Primary Recommendation: SN74HCT02PWR (Texas Instruments) is the preferred substitute. This part is currently active in production, available in high inventory (2700 Pcs), and supplied in Tape & Reel packaging suitable for automated assembly. Propagation delay of 18ns at 5.5V meets timing requirements for most applications.

Alternative Option: SN74HCT02APWR (Texas Instruments) offers the fastest propagation delay at 15ns @ 5.5V, 50pF, making it suitable for timing-critical applications. This part is also active and available in high inventory (2128 Pcs).

Secondary Option: 74HCT02PW,118 (NXP Semiconductors) maintains active product status and provides high inventory availability (31902 Pcs). This part is suitable when NXP sourcing is preferred.

Note on Package Differences: The main part uses 14-SSOP packaging (5.30mm width), while Texas Instruments substitutes use 14-TSSOP packaging (4.40mm width). Both are surface mount packages with compatible pinouts for the 74HCT02 base product number. PCB layout modifications may be required to accommodate the narrower TSSOP package footprint.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HCT02PWR as a direct replacement for 74HCT02DB,118?

A: Yes. Both parts share identical logic function (4-channel 2-input NOR gate), supply voltage range (4.5V ~ 5.5V), quiescent current (2 µA max), output current (4mA), and input logic levels. The primary difference is package type: 14-SSOP versus 14-TSSOP. PCB footprint adjustment is required.

Q: What is the difference between 14-SSOP and 14-TSSOP packages?

A: Both are 14-pin surface mount packages with compatible pinouts for the 74HCT02 logic IC. The SSOP (Shrink Small Outline Package) measures 5.30mm in width, while TSSOP (Thin Shrink Small Outline Package) measures 4.40mm in width. TSSOP is a more compact variant. Component placement and solder reflow parameters remain compatible.

Q: Why is the 74HCT02DB,118 marked as obsolete?

A: Nexperia has discontinued this specific part number. Active substitutes from Texas Instruments and NXP Semiconductors provide equivalent functionality and are recommended for new designs and ongoing procurement.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL Level 1 (unlimited moisture sensitivity level), matching the compliance profile of the original 74HCT02DB,118.

Q: Which substitute has the fastest propagation delay?

A: SN74HCT02APWR offers the fastest propagation delay at 15ns @ 5.5V, 50pF. The main part specifies 19ns @ 4.5V, 50pF. For timing-critical applications, SN74HCT02APWR is the optimal choice.

Q: What is the operating temperature range for each substitute?

A: SN74HCT02APWR, SN74HCT02PW, and SN74HCT02PWR all operate from -40°C to 85°C. The original 74HCT02DB,118 operates from -40°C to 125°C. If extended temperature operation above 85°C is required, the original part specification cannot be matched by current substitutes.