SN74AHC02D Equivalent & Substitute Parts

Part Overview

The SN74AHC02D is a NOR Gate IC with 4 channels and 2 inputs per channel, manufactured by Texas Instruments in a 14-SOIC surface mount package. This logic gate is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements. The part operates across a wide supply voltage range of 2V to 5.5V with low quiescent current and standard propagation delay characteristics suitable for general-purpose digital logic applications.

Substiute Parts

SN74AHC02D

Texas InstrumentsIn Stock: 5434SN74AHC02D Datasheet

Current PartRFQ

SN74AHC02DR

Texas InstrumentsIn Stock: 3792SN74AHC02DR Datasheet

DirectRFQ

74AHC02D,118

NXP USA Inc.In Stock: 1177874AHC02D,118 Datasheet

UpgradeRFQ

74VHC02D,118

Nexperia USA Inc.In Stock: 177274VHC02D,118 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74AHC02D is determined by the following critical parameters: logic function (NOR gate with 4 channels, 2 inputs), electrical specifications (supply voltage range 2V–5.5V, quiescent current 2 µA maximum, output current 8mA), logic threshold levels, propagation delay performance, operating temperature range, and surface mount package compatibility (14-SOIC form factor).

The substitute parts are grouped into two categories:

Direct Equivalent (Same Manufacturer, Different Packaging): SN74AHC02DR maintains identical electrical specifications and is manufactured by Texas Instruments. The primary difference is packaging format (Tape & Reel versus Tube), which does not affect functional or electrical performance.

Functional Equivalents (Alternative Manufacturers, Same Series): 74AHC02D,118 (NXP USA Inc.) and 74VHC02D,118 (Nexperia USA Inc.) provide the same logic function and electrical performance within the specified parameters. These parts are from established logic gate series with proven compatibility in 74-series applications. The 74VHC02D,118 operates from the 74VHC series, which maintains electrical compatibility with 74AHC specifications while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement with Maintained Manufacturer Continuity: Select SN74AHC02DR. This part is manufactured by Texas Instruments, maintaining design continuity with the original SN74AHC02D. It carries active product status and ROHS3 compliance. The only functional difference is packaging format (Tape & Reel versus Tube), which does not affect electrical performance or PCB assembly compatibility.

For Extended Availability and Active Product Status: Select 74AHC02D,118 (NXP USA Inc.) or 74VHC02D,118 (Nexperia USA Inc.). Both parts are currently active in production with higher inventory levels than the discontinued SN74AHC02D. The 74VHC02D,118 offers improved propagation delay performance (7.5ns versus 8.5ns) and carries ROHS3 compliance and MSL Level 1 rating. All three substitute parts meet the electrical and functional requirements of the original design.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and operate within the specified temperature and voltage ranges. The 74VHC02D,118 provides the most comprehensive compliance documentation with REACH Unaffected status.

Frequently Asked Questions (FAQ)

Q: Can SN74AHC02DR be used as a direct replacement for SN74AHC02D?

A: Yes. SN74AHC02DR is electrically and functionally identical to SN74AHC02D. Both are manufactured by Texas Instruments with identical logic specifications, voltage ranges, current ratings, and propagation delay. The difference is packaging format: SN74AHC02D is supplied in Tube packaging, while SN74AHC02DR is supplied in Tape & Reel format. Both use the 14-SOIC package and are compatible with the same PCB footprint.

Q: What is the difference between 74AHC02D,118 and 74VHC02D,118?

A: Both parts provide the same NOR gate logic function with identical electrical specifications within the design parameters. The primary difference is the manufacturer: 74AHC02D,118 is from NXP USA Inc., while 74VHC02D,118 is from Nexperia USA Inc. The 74VHC02D,118 offers slightly faster propagation delay (7.5ns versus 8.5ns at 5V, 50pF) and carries active product status with higher inventory availability.

Q: Are the 14-SOIC and 14-SO packages interchangeable?

A: Yes, for PCB assembly purposes. Both 14-SOIC and 14-SO refer to the same 14-pin small-outline IC package with 0.154" width and 3.90mm body width. The designations are used interchangeably by different manufacturers. Pin configuration and spacing are identical, making them compatible with the same PCB footprint.

Q: Can these parts be used in designs requiring extended temperature operation?

A: Yes. All substitute parts operate across the full temperature range of -40°C to 125°C, meeting the specifications of the original SN74AHC02D. This range covers industrial and automotive applications within standard operating conditions.

Q: What is the significance of the propagation delay difference in 74AHC02D,118 and 74VHC02D,118?

A: The 74AHC02D,118 and 74VHC02D,118 both specify 7.5ns maximum propagation delay at 5V with 50pF load, compared to 8.5ns for the original SN74AHC02D. This represents improved performance and does not create compatibility issues in designs. Circuits designed for 8.5ns propagation delay will operate correctly with parts rated for 7.5ns.

Q: Are all substitute parts RoHS compliant?

A: SN74AHC02DR and 74VHC02D,118 are explicitly ROHS3 compliant. The 74AHC02D,118 from NXP does not have RoHS status specified in the provided data. For applications requiring RoHS certification, SN74AHC02DR or 74VHC02D,118 are recommended.