SN74AHC02PW NOR Gate IC Equivalent & Substitute Parts

Part Overview

The SN74AHC02PW is a 4-channel, 2-input NOR gate logic IC manufactured by Texas Instruments in a 14-TSSOP surface mount package. This part is currently discontinued at DiGi Electronics, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The 74AHC02 logic family provides standard NOR gate functionality across a wide supply voltage range, suitable for digital logic applications requiring low power consumption and fast propagation delays.

Substiute Parts

SN74AHC02PW

Texas InstrumentsIn Stock: 1716SN74AHC02PW Datasheet

Current PartRFQ

SN74AHC02PWR

Texas InstrumentsIn Stock: 5813SN74AHC02PWR Datasheet

DirectRFQ

74VHC02MTCX

onsemiIn Stock: 3643774VHC02MTCX Datasheet

DirectRFQ

MC74VHC02DTR2G

onsemiIn Stock: 19833MC74VHC02DTR2G Datasheet

DirectRFQ

74AHC02PW,118

NXP SemiconductorsIn Stock: 24685174AHC02PW,118 Datasheet

UpgradeRFQ

74VHC02PW,118

Nexperia USA Inc.In Stock: 82474VHC02PW,118 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AHC02PW is determined by the following critical parameters:

Functional Requirements:

• Logic Type: NOR Gate (4 channels, 2 inputs per channel)
• Package: 14-TSSOP surface mount form factor
• Supply Voltage Range: 2V ~ 5.5V minimum
• Output Current Capability: 8mA minimum (both high and low)

Electrical Compatibility:

• Quiescent current not to exceed 2 µA
• Input logic levels must accommodate standard CMOS thresholds
• Propagation delay performance within acceptable margins for digital logic applications

Compliance & Environmental:

• RoHS3 compliance required
• MSL rating of 1 (unlimited moisture sensitivity)
• Operating temperature range must support -40°C ~ 125°C or equivalent industrial range

Substitute parts are grouped into two categories: direct equivalents (identical base product number with different packaging) and functional equivalents (alternative manufacturer series with matching electrical specifications and package).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74AHC02PWR (Texas Instruments)

The SN74AHC02PWR is the direct equivalent of the discontinued SN74AHC02PW, differing only in packaging format (Tape & Reel versus Tube). Both parts share identical electrical specifications, operating temperature range (-40°C ~ 125°C), and propagation delay performance (8.5ns @ 5V, 50pF). This part maintains active product status and is currently in stock with high availability (5800 units). Selection of this part eliminates any design risk and maintains full compatibility with existing schematics and PCB layouts.

Secondary Recommendations: 74VHC02 Series (onsemi / Nexperia)

The 74VHC02MTCX (onsemi) and MC74VHC02DTR2G (onsemi) provide functional equivalence with improved propagation delay performance (7.5ns versus 8.5ns). Both parts operate within the same supply voltage range and output current specifications. The primary design consideration is the reduced operating temperature range (-40°C ~ 85°C) compared to the original part (-40°C ~ 125°C). These substitutes are suitable for applications where the upper temperature limit does not exceed 85°C.

The 74VHC02PW,118 (Nexperia USA Inc.) maintains the full operating temperature range (-40°C ~ 125°C) while offering the faster propagation delay of the 74VHC series. This part provides the optimal balance of performance and thermal compatibility for designs requiring extended temperature operation.

Compliance Status:

All recommended substitute parts maintain ROHS3 compliance, MSL rating of 1 (unlimited), and REACH unaffected status, ensuring regulatory and environmental compatibility with the original design specification.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74AHC02PW with SN74AHC02PWR?

A: Yes. Both parts are electrically identical and use the same 14-TSSOP package. The only difference is packaging format: SN74AHC02PW ships in Tube packaging, while SN74AHC02PWR ships in Tape & Reel format. No design changes are required.

Q: What is the difference between 74AHC and 74VHC series?

A: Both series implement identical NOR gate logic with the same pin configuration and package. The 74VHC series offers faster propagation delay (7.5ns versus 8.5ns at 5V, 50pF). The 74AHC series supports a wider operating temperature range (-40°C ~ 125°C) compared to most 74VHC variants (-40°C ~ 85°C), with the exception of 74VHC02PW,118 which maintains the full range.

Q: Are there any input logic level differences between substitute parts?

A: The SN74AHC02PW, SN74AHC02PWR, and 74VHC02PW,118 specify input logic levels as 0.5V ~ 1.65V (low) and 1.5V ~ 3.85V (high). The onsemi 74VHC variants (74VHC02MTCX and MC74VHC02DTR2G) specify simplified thresholds of 0.5V (low) and 1.5V (high). Both specifications are compatible with standard CMOS logic levels and do not affect substitution eligibility.

Q: Which substitute part should I use for high-temperature applications?

A: For applications requiring operation above 85°C, use either SN74AHC02PWR (Texas Instruments) or 74VHC02PW,118 (Nexperia USA Inc.). Both parts support the full -40°C ~ 125°C operating range. The 74VHC02PW,118 offers the additional benefit of faster propagation delay (7.5ns).

Q: Does packaging format affect electrical performance?

A: No. Tube and Tape & Reel packaging formats contain identical die and electrical specifications. Packaging selection is determined by assembly process requirements and inventory management practices. Both formats are suitable for automated pick-and-place assembly.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts maintain ROHS3 compliance and MSL rating of 1 (unlimited moisture sensitivity), ensuring compatibility with lead-free assembly processes and environmental regulations.