CD74AC02EG4 Equivalent & Substitute Parts

Part Overview

The CD74AC02EG4 is a NOR Gate IC featuring 4 channels with 2 inputs per channel in a 14-PDIP package. This logic component is manufactured by Texas Instruments and is currently discontinued at DiGi Electronics. The part operates across a wide supply voltage range of 1.5V to 5.5V and is suitable for digital logic applications requiring NOR gate functionality. Due to its discontinued status, identifying equivalent substitute parts is essential for design continuity and procurement planning.

Substiute Parts

CD74AC02EG4

Texas InstrumentsIn Stock: 844CD74AC02EG4 Datasheet

Current PartRFQ

CD74AC02E

Harris CorporationIn Stock: 1543CD74AC02E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74AC02EG4 is determined by strict equivalence across the following critical parameters:

• Logic Type: NOR Gate
• Number of Circuits: 4 channels
• Number of Inputs: 2 inputs per channel
• Voltage - Supply: 1.5V ~ 5.5V
• Current - Quiescent (Max): 4 µA
• Current - Output High, Low: 24mA, 24mA
• Max Propagation Delay @ 5V, 50pF: 11.5ns
• Operating Temperature: -55°C ~ 125°C
• Package / Case: 14-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Base Product Number: 74AC02

The CD74AC02E from Harris Corporation meets all electrical and mechanical specifications required for direct substitution. Both parts share identical functional parameters, supply voltage ranges, output current ratings, propagation delay characteristics, and thermal operating ranges. The 14-PDIP package configuration is consistent across both parts, ensuring mechanical compatibility in through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

The CD74AC02E from Harris Corporation is a direct functional equivalent to the CD74AC02EG4. Both parts deliver identical electrical performance across all specified parameters. The primary distinction is product status: the CD74AC02EG4 is discontinued at DiGi Electronics, while the CD74AC02E is listed as obsolete. The CD74AC02EG4 maintains ROHS3 compliance, whereas the CD74AC02E is RoHS non-compliant. For applications requiring RoHS compliance, the CD74AC02EG4 remains the preferred choice if available. For applications without RoHS requirements, the CD74AC02E provides functional equivalence with confirmed inventory availability of 1465 units.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC02E replace the CD74AC02EG4 in my circuit?

A: Yes. Both parts are NOR gate ICs with 4 channels and 2 inputs per channel. They share identical electrical specifications including supply voltage range (1.5V ~ 5.5V), quiescent current (4 µA max), output current (24mA), propagation delay (11.5ns @ 5V, 50pF), and operating temperature range (-55°C ~ 125°C). The 14-DIP package is mechanically identical, enabling direct pin-compatible substitution.

Q: What is the difference between CD74AC02EG4 and CD74AC02E?

A: The primary differences are manufacturer (Texas Instruments vs. Harris Corporation) and compliance status. The CD74AC02EG4 is ROHS3 compliant, while the CD74AC02E is RoHS non-compliant. Both parts are now discontinued or obsolete. All functional and electrical parameters are identical.

Q: Are there any package differences between these parts?

A: No. Both parts use the 14-DIP (0.300", 7.62mm) package with through-hole mounting. Pin configuration and mechanical dimensions are identical, ensuring direct board-level compatibility.

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

A: Selection depends on compliance requirements. If RoHS compliance is mandatory, the CD74AC02EG4 is the appropriate choice. If RoHS compliance is not required, the CD74AC02E offers functional equivalence. Verify current inventory availability with your supplier before finalizing procurement decisions.

Q: What does the 74AC02 base product number indicate?

A: The 74AC02 is the base product designation for a 4-channel NOR gate in the 74AC logic family. Suffixes like "EG4" and "E" indicate specific manufacturer variants and packaging configurations, but all variants sharing the 74AC02 base number deliver identical logic functionality.