74AC02PC NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC02PC is a 4-channel 2-input NOR gate logic IC manufactured by onsemi in 14-MDIP packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74AC02 series represents a standard logic gate function widely used in digital circuit applications, and multiple manufacturers have produced compatible variants under the same base product number.

Substiute Parts

74AC02PC

onsemiIn Stock: 195474AC02PC Datasheet

Current PartRFQ

CD74AC02E

Harris CorporationIn Stock: 1543CD74AC02E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC02PC with the CD74AC02E is based on the following criteria:

Both parts share the same base product number (74AC02) and implement identical logic functionality: 4-channel 2-input NOR gates. Both are packaged in 14-DIP through-hole format with 0.300" (7.62mm) pitch, ensuring mechanical and pin compatibility.

The electrical parameters that determine substitutability are:

• Supply voltage range overlap (1.5V ~ 5.5V for CD74AC02E encompasses the 2V ~ 6V range of 74AC02PC within practical operating margins)
• Output current capability (24mA for both)
• Package and pinout identity (14-DIP)

Both parts are classified as obsolete products, indicating end-of-life status from their respective manufacturers.

Parameter Comparison

Engineering Selection Recommendations

The CD74AC02E serves as a direct functional substitute for the 74AC02PC based on identical logic configuration, pinout, and package format. Both components are obsolete, indicating limited future availability from primary sources.

Selection between these parts should account for the following provided specifications:

The 74AC02PC offers faster propagation delay (6.5ns versus 11.5ns), making it preferable for timing-critical applications. The CD74AC02E provides a wider operating temperature range (-55°C to 125°C versus -40°C to 85°C) and lower minimum supply voltage (1.5V versus 2V), suitable for extended environmental or low-voltage applications.

The CD74AC02E is RoHS non-compliant, while the 74AC02PC carries REACH Unaffected status. Both share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC02E replace the 74AC02PC in existing designs?

A: Yes. Both parts implement the same 4-channel 2-input NOR gate logic and use identical 14-DIP pinout and package dimensions. Pin-for-pin substitution is possible without circuit board modifications.

Q: What are the key differences between these parts?

A: The primary differences are propagation delay (74AC02PC: 6.5ns; CD74AC02E: 11.5ns), operating temperature range (74AC02PC: -40°C to 85°C; CD74AC02E: -55°C to 125°C), and quiescent current (74AC02PC: 2µA; CD74AC02E: 4µA). Supply voltage ranges overlap but differ at the extremes.

Q: Which part should I select for a new design?

A: Both parts are obsolete. Selection depends on application requirements: choose 74AC02PC for timing-critical circuits, or CD74AC02E for extended temperature range or low-voltage operation. Verify current inventory availability before design commitment.

Q: Are there packaging differences?

A: No. Both parts use 14-DIP (0.300", 7.62mm) through-hole packaging with identical pinout and mechanical dimensions.

Q: What is the impact of the propagation delay difference?

A: The 74AC02PC has 5ns faster propagation delay. For applications with timing margins below 5ns, the 74AC02PC is required. For general logic applications, the CD74AC02E delay is acceptable.

Q: Does RoHS compliance affect substitution?

A: The CD74AC02E is RoHS non-compliant while the 74AC02PC carries REACH Unaffected status. Regulatory requirements for your application determine which part is acceptable.