CD74HC02EG4 Equivalent & Substitute Parts

Part Overview

The CD74HC02EG4 is a NOR Gate IC featuring 4 channels with 2 inputs per channel in a 14-PDIP package, manufactured by Texas Instruments. This logic gate is designed for digital circuit applications requiring NOR logic operations across a wide supply voltage range of 2V to 6V. The part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD74HC02EG4

Texas InstrumentsIn Stock: 802CD74HC02EG4 Datasheet

Current PartRFQ

CD74HC02E

Harris CorporationIn Stock: 2900CD74HC02E Datasheet

MFR RecommendedRFQ

TC74HC02APF

Toshiba Semiconductor and StorageIn Stock: 7956TC74HC02APF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74HC02EG4 is determined by the following critical parameters:

• Logic Function: NOR Gate with 4 channels and 2 inputs per channel
• Package Type: 14-DIP (0.300", 7.62mm) through-hole mounting
• Supply Voltage Range: 2V ~ 6V compatibility
• Input/Output Logic Levels: Matching threshold specifications
• Output Current Capability: 5.2mA for both high and low states
• Base Product Number: 74HC02 series designation

The identified substitute parts maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

CD74HC02E (Harris Corporation): This substitute maintains identical electrical specifications and operating temperature range to the main part. However, it carries RoHS non-compliant status, which may restrict use in applications subject to RoHS regulations. Inventory availability is substantial at 2800 pieces.

TC74HC02APF (Toshiba Semiconductor and Storage): This substitute offers ROHS3 compliance matching the original part and features improved quiescent current performance at 1 µA versus 2 µA. Propagation delay is reduced to 13ns at 6V with 50pF load. The operating temperature range is narrower (-40°C ~ 85°C) compared to the main part (-55°C ~ 125°C), which may limit use in extended temperature applications. This part is currently active in production with high inventory availability at 7934 pieces.

Frequently Asked Questions (FAQ)

Q: Can CD74HC02E be used as a direct replacement for CD74HC02EG4?

A: CD74HC02E maintains identical electrical and thermal specifications. The primary consideration is RoHS compliance status; CD74HC02E is non-compliant, while CD74HC02EG4 is ROHS3 compliant. Selection depends on regulatory requirements for your application.

Q: What are the differences between TC74HC02APF and the original CD74HC02EG4?

A: TC74HC02APF is functionally equivalent with three key differences: quiescent current is lower (1 µA vs 2 µA), propagation delay is faster (13ns vs 15ns), and operating temperature range is narrower (-40°C ~ 85°C vs -55°C ~ 125°C). All three parts use identical 14-DIP packaging and maintain the same supply voltage range and output current specifications.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the 14-DIP (0.300", 7.62mm) package with identical pinout for the 74HC02 logic gate configuration, enabling direct socket substitution.

Q: Which substitute should I select for new designs?

A: TC74HC02APF is recommended for new designs due to active production status, ROHS3 compliance, and improved electrical performance. CD74HC02E may be considered only if temperature range requirements do not exceed -40°C ~ 85°C and RoHS non-compliance is acceptable.

Q: What is the impact of the narrower operating temperature range in TC74HC02APF?

A: TC74HC02APF operates from -40°C ~ 85°C versus the original -55°C ~ 125°C range. Applications requiring operation below -40°C or above 85°C must use CD74HC02E or CD74HC02EG4 if available.