74HC02DB,118 NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74HC02DB,118 is a 4-channel NOR gate logic IC manufactured by Nexperia USA Inc. in a 14-SSOP surface mount package. This component implements four independent 2-input NOR logic functions and operates across a 2V to 6V supply voltage range. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain identical logic functionality, electrical performance, and compatible packaging to ensure direct replacement capability.

Substiute Parts

74HC02DB,118

Nexperia USA Inc.In Stock: 73974HC02DB,118 Datasheet

Current PartRFQ

74HC02PW,118

Nexperia USA Inc.In Stock: 191374HC02PW,118 Datasheet

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SN74HC02DBR

Texas InstrumentsIn Stock: 2079SN74HC02DBR Datasheet

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SN74HC02PWT

Texas InstrumentsIn Stock: 3475SN74HC02PWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74HC02DB,118 is determined by the following critical parameters:

• Logic function: 4-channel NOR gate with 2 inputs per channel
• Electrical specifications: 2V ~ 6V supply voltage, 15ns maximum propagation delay at 6V with 50pF load, 2 µA quiescent current, 5.2mA output drive capability
• Package compatibility: 14-pin surface mount packages (SSOP or TSSOP variants)
• Compliance: ROHS3 compliance and MSL Level 1 rating

Substitute parts are grouped into two categories based on package type:

Category 1: 14-SSOP Package (0.209" width) Parts maintaining the exact SSOP footprint of the original component.

Category 2: 14-TSSOP Package (0.173" width) Parts using the thinner TSSOP variant, which requires PCB layout adjustment but maintains electrical equivalence.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (14-SSOP Package):

The SN74HC02DBR from Texas Instruments is the primary substitute for the 74HC02DB,118. Both parts use the 14-SSOP package with identical 0.209" width and pin spacing, enabling direct PCB replacement without layout modification. The SN74HC02DBR maintains all electrical specifications and is currently in active production status. The operating temperature range is reduced to -40°C ~ 85°C compared to the original -40°C ~ 125°C specification; this difference must be evaluated against application requirements.

For Space-Constrained Designs (14-TSSOP Package):

The 74HC02PW,118 from Nexperia USA Inc. provides electrical equivalence with a thinner 14-TSSOP package (0.173" width). This part is currently active and maintains the full -40°C ~ 125°C operating temperature range of the original. PCB layout modification is required to accommodate the different package footprint. The SN74HC02PWT from Texas Instruments offers the same 14-TSSOP package with Texas Instruments manufacturing, though it is listed as discontinued at DiGi Electronics and has a reduced operating temperature range of -40°C ~ 85°C.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the 74HC02PW,118 replace the 74HC02DB,118 on the same PCB without modification?

A: No. The 74HC02PW,118 uses a 14-TSSOP package (0.173" width) while the 74HC02DB,118 uses a 14-SSOP package (0.209" width). The footprints are not interchangeable. PCB layout redesign is required to accommodate the thinner TSSOP package.

Q: What is the difference between the Nexperia and Texas Instruments versions?

A: Both manufacturers produce electrically equivalent 74HC02 NOR gate ICs with identical logic function and electrical performance. The primary differences are manufacturing source and, in some cases, operating temperature range. The SN74HC02DBR and SN74HC02PWT from Texas Instruments have a reduced operating temperature maximum of 85°C compared to 125°C for Nexperia parts.

Q: Is the SN74HC02DBR suitable for applications requiring -40°C ~ 125°C operation?

A: No. The SN74HC02DBR is rated for -40°C ~ 85°C operation. For applications requiring the full -40°C ~ 125°C temperature range, use the 74HC02PW,118 from Nexperia USA Inc., which maintains the original temperature specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL Level 1 rating, matching the compliance profile of the original 74HC02DB,118.

Q: What is the inventory status of these substitute parts?

A: The 74HC02PW,118 has 1900 units in stock, the SN74HC02DBR has 1988 units in stock, and the SN74HC02PWT has 3390 units in stock. Availability should be confirmed with the supplier for current production requirements.