SN74HC03DT NAND Gate IC Equivalent & Substitute Parts

Part Overview

The SN74HC03DT is a 4-channel 2-input NAND gate IC with open drain output in 14-SOIC surface mount packaging, manufactured by Texas Instruments. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The 74HC03 logic family provides standard NAND gate functionality across the 2V to 6V supply voltage range with open drain configuration suitable for wired logic applications.

Substiute Parts

SN74HC03DT

Texas InstrumentsIn Stock: 1105SN74HC03DT Datasheet

Current PartRFQ

SN74HC03DR

Texas InstrumentsIn Stock: 5601SN74HC03DR Datasheet

Parametric EquivalentRFQ

MC74HC03ADR2G

onsemiIn Stock: 11169MC74HC03ADR2G Datasheet

DirectRFQ

74HC03D,653

NXP SemiconductorsIn Stock: 1182874HC03D,653 Datasheet

MFR RecommendedRFQ

MC74HC03ADG

onsemiIn Stock: 1121MC74HC03ADG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74HC03DT is determined by matching the following critical parameters: logic type (NAND gate), circuit count (4 channels), input count (2 inputs per gate), open drain feature, supply voltage range (2V ~ 6V), output current capability (5.2mA), input logic levels, propagation delay, package type (14-SOIC), and compliance certifications (ROHS3, MSL 1).

The substitute parts are grouped into three categories based on manufacturer and packaging:

Parametric Equivalent: SN74HC03DR maintains identical electrical specifications and 14-SOIC packaging from Texas Instruments with active product status.

Direct Manufacturer Equivalent: MC74HC03ADR2G from onsemi provides enhanced performance characteristics (1 µA quiescent current, 20ns propagation delay) and extended operating temperature range (-55°C ~ 125°C) while maintaining 14-SOIC packaging and open drain functionality.

Manufacturer Recommended Alternatives: 74HC03D,653 (NXP Semiconductors, bulk packaging) and MC74HC03ADG (onsemi, tube packaging) offer the same logic functionality with alternative packaging formats for different procurement and assembly requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - SN74HC03DR: This Texas Instruments part provides direct parametric equivalence to the SN74HC03DT with identical electrical specifications and 14-SOIC packaging. Active product status ensures long-term availability. Selection is appropriate for applications requiring exact specification matching and Texas Instruments sourcing continuity.

Enhanced Performance Alternative - MC74HC03ADR2G: The onsemi MC74HC03ADR2G offers superior performance characteristics with reduced quiescent current (1 µA versus 2 µA) and faster propagation delay (20ns versus 23ns). Extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C) supports wider environmental applications. ROHS3 compliance and MSL 1 rating maintain regulatory requirements. Selection is appropriate for applications benefiting from lower power consumption and extended temperature operation.

Packaging Alternatives - MC74HC03ADG and 74HC03D,653: These parts provide equivalent logic functionality with alternative packaging formats. MC74HC03ADG in tube packaging and 74HC03D,653 in bulk packaging accommodate different procurement workflows and assembly processes. Both maintain active product status and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can SN74HC03DR be used as a direct replacement for SN74HC03DT?

A: Yes. SN74HC03DR is a parametric equivalent with identical logic type, circuit count, input configuration, open drain feature, supply voltage range, output current, input logic levels, propagation delay, and 14-SOIC packaging. Both are ROHS3 compliant with MSL 1 rating.

Q: What are the advantages of MC74HC03ADR2G over SN74HC03DT?

A: MC74HC03ADR2G provides lower quiescent current (1 µA versus 2 µA), faster propagation delay (20ns versus 23ns), and extended operating temperature range (-55°C ~ 125°C versus -40°C ~ 85°C). All other electrical parameters and packaging remain compatible.

Q: Are the onsemi parts (MC74HC03ADR2G and MC74HC03ADG) functionally equivalent to the Texas Instruments original?

A: Yes. Both onsemi parts maintain the same logic type, circuit count, input configuration, open drain feature, supply voltage range, output current capability, and input logic levels. The primary differences are quiescent current, propagation delay, operating temperature range, and packaging format.

Q: What is the difference between MC74HC03ADR2G and MC74HC03ADG?

A: Both parts are electrically identical. The difference is packaging: MC74HC03ADR2G is supplied in cut tape (CT) and Digi-Reel format, while MC74HC03ADG is supplied in tube packaging. Selection depends on assembly process requirements and procurement preferences.

Q: Can 74HC03D,653 be used in place of SN74HC03DT?

A: 74HC03D,653 provides equivalent NAND gate logic functionality with open drain output. However, detailed electrical specifications are not provided for this part. Compatibility should be confirmed through NXP Semiconductors documentation before selection for critical applications.

Q: Is the 14-SOIC package identical across all substitute parts?

A: Yes. All substitute parts use 14-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring mechanical and electrical compatibility with existing PCB designs and assembly processes.

Q: What compliance certifications apply to these substitute parts?

A: SN74HC03DR, MC74HC03ADR2G, and MC74HC03ADG are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts are REACH unaffected and carry EAR99 ECCN classification.