CD74HCT02M Equivalent & Substitute Parts

Part Overview

The CD74HCT02M 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 part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. The 74HCT02 logic family provides standard NOR gate functionality suitable for digital logic circuits requiring low-power CMOS operation with TTL-compatible input/output levels.

Substiute Parts

CD74HCT02M

Texas InstrumentsIn Stock: 818CD74HCT02M Datasheet

Current PartRFQ

CD74HCT02M96

Harris CorporationIn Stock: 5266CD74HCT02M96 Datasheet

DirectRFQ

74HCT02D,653

Nexperia USA Inc.In Stock: 899474HCT02D,653 Datasheet

MFR RecommendedRFQ

74HCT02D-Q100,118

Nexperia USA Inc.In Stock: 100474HCT02D-Q100,118 Datasheet

MFR RecommendedRFQ

74HCT373D,653

Nexperia USA Inc.In Stock: 787874HCT373D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74HCT02M is determined by the following critical parameters:

• Logic Function: NOR Gate with 4 channels, 2 inputs per channel
• Electrical Specifications: Supply voltage 4.5V ~ 5.5V, quiescent current 2 µA maximum, output current 4mA
• Input/Output Levels: TTL-compatible logic levels (Low 0.8V, High 2V)
• Propagation Delay: Maximum 21ns at 4.5V with 50pF load
• Package: 14-SOIC surface mount form factor
• Temperature Range: Operating from -55°C to 125°C
• Compliance: RoHS3 compliance and MSL Level 1

Direct substitutes must match all electrical parameters and package specifications. The 74HCT02 base product number identifies the functional equivalence across manufacturers.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 74HCT02D,653 (Nexperia USA Inc.)

This part is the recommended substitute for the CD74HCT02M. It maintains full electrical equivalence with identical supply voltage, quiescent current, output current, and logic levels. The propagation delay is 19ns, which is superior to the original 21ns specification. The part is currently active in production, ROHS3 compliant, and available in high inventory (8913 pcs). The operating temperature range is -40°C to 125°C, which covers the majority of industrial applications. Packaging is Cut Tape (CT) & Digi-Reel format.

Secondary Substitute: 74HCT02D-Q100,118 (Nexperia USA Inc.)

This variant is suitable for automotive applications requiring AEC-Q100 qualification. It provides identical electrical performance to the primary substitute with 19ns propagation delay and is ROHS3 compliant. The operating temperature range is -40°C to 125°C. Packaging is Tape & Reel (TR) format with 942 pcs in inventory. Select this part only if automotive-grade qualification is a design requirement.

Not Recommended: CD74HCT02M96 (Harris Corporation)

This part is marked as obsolete and is not RoHS3 compliant. Although it maintains electrical equivalence with the original CD74HCT02M, its non-compliance status and obsolete status make it unsuitable for new designs or long-term supply chain planning.

Not Recommended: 74HCT373D,653

This part is a D-Type Transparent Latch with different logic function (8:8 configuration), different package (20-SOIC), and different electrical characteristics (6mA output current, 14ns propagation delay). It is not functionally equivalent to the CD74HCT02M NOR gate and cannot serve as a substitute.

Frequently Asked Questions (FAQ)

Q: Can I use 74HCT02D,653 as a direct replacement for CD74HCT02M in my circuit?

A: Yes. Both parts are 4-channel NOR gates in 14-SOIC packages with identical electrical specifications for supply voltage, quiescent current, output current, and logic levels. The 74HCT02D,653 has superior propagation delay (19ns vs 21ns), making it functionally compatible. Verify your operating temperature requirement; the 74HCT02D,653 operates from -40°C to 125°C, while the original operates from -55°C to 125°C.

Q: What is the difference between 74HCT02D,653 and 74HCT02D-Q100,118?

A: Both parts are electrically identical NOR gates with 19ns propagation delay and ROHS3 compliance. The 74HCT02D-Q100,118 carries AEC-Q100 automotive qualification, making it suitable for automotive applications. The 74HCT02D,653 is the standard industrial-grade version. Select based on your application requirements.

Q: Why is CD74HCT02M96 not recommended as a substitute?

A: Although CD74HCT02M96 maintains electrical equivalence, it is marked as obsolete and is not RoHS3 compliant. For new designs and long-term supply chain reliability, the active Nexperia parts (74HCT02D,653 or 74HCT02D-Q100,118) are the appropriate choices.

Q: Can 74HCT373D,653 replace the CD74HCT02M?

A: No. The 74HCT373D,653 is a D-Type Transparent Latch with 8:8 configuration, not a NOR gate. It has different logic function, different package (20-SOIC vs 14-SOIC), and different electrical characteristics. It is not functionally equivalent.

Q: What packaging formats are available for the substitute parts?

A: The 74HCT02D,653 is available in Cut Tape (CT) & Digi-Reel format. The 74HCT02D-Q100,118 is available in Tape & Reel (TR) format. Both are surface mount packages compatible with standard pick-and-place assembly equipment.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both 74HCT02D,653 and 74HCT02D-Q100,118 are ROHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity level), matching the compliance profile of the original CD74HCT02M.