74HC02D,652 NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74HC02D,652 is a 4-channel 2-input NOR gate logic IC manufactured by Nexperia USA Inc. in a 14-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 74HC02 series represents a standard logic gate function across multiple manufacturers, enabling direct functional substitution based on electrical and mechanical parameter compatibility.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V to 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	5.2mA / 5.2mA
Input Logic Level - Low	0.5V to 1.8V
Input Logic Level - High	1.5V to 4.2V
Max Propagation Delay	15ns @ 6V, 50pF
Operating Temperature	-40°C to 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74HC02D,652 is determined by strict equivalence across the following critical parameters:

Logic function: 4-channel 2-input NOR gate
Package type: 14-SOIC surface mount
Voltage supply range: 2V to 6V minimum
Output current capability: 5.2mA minimum for both high and low states
Input logic thresholds: Compatible with 0.5V–1.8V (low) and 1.5V–4.2V (high)
Propagation delay: 15ns maximum @ 6V, 50pF load
Operating temperature range: Minimum -40°C to 125°C

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Equivalent (Same Packaging & Specifications): 74HC02D,653 maintains identical electrical specifications and packaging, differing only in product status (Active vs. Obsolete) and inventory form factor.

Direct Manufacturer Alternatives (Texas Instruments): SN74HC02QDRQ1 provides automotive-grade qualification (AEC-Q100) with identical electrical performance in Tape & Reel packaging.

Upgrade Options (Extended Temperature Range): CD74HC02M96 and CD74HC02MT extend the operating temperature range to -55°C to 125°C, suitable for industrial applications requiring wider temperature tolerance.

Cross-Manufacturer Equivalents: MC74HC02ADG, MC74HC02ADR2G (onsemi), MM74HC02M, MM74HC02MX (Fairchild/onsemi), and SN74HC02D, SN74HC02DR (Texas Instruments) provide functional equivalence with minor variations in quiescent current and propagation delay specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temperature	Package
74HC02D,652	Nexperia USA Inc.	Obsolete	2V–6V	2 µA	15ns	-40°C to 125°C	14-SOIC
74HC02D,653	Nexperia USA Inc.	Active	2V–6V	2 µA	15ns	-40°C to 125°C	14-SOIC
SN74HC02QDRQ1	Texas Instruments	Active	2V–6V	2 µA	15ns	-40°C to 125°C	14-SOIC
CD74HC02M96	Texas Instruments	Active	2V–6V	2 µA	15ns	-55°C to 125°C	14-SOIC
CD74HC02MT	Texas Instruments	Discontinued at DiGi Electronics	2V–6V	2 µA	15ns	-55°C to 125°C	14-SOIC
MC74HC02ADG	onsemi	Active	2V–6V	1 µA	13ns	-55°C to 125°C	14-SOIC
MC74HC02ADR2G	onsemi	Active	2V–6V	1 µA	13ns	-55°C to 125°C	14-SOIC
MM74HC02M	Fairchild Semiconductor	Active	2V–6V	2 µA	15ns	-40°C to 85°C	14-SOIC
MM74HC02MX	onsemi	Active	2V–6V	2 µA	15ns	-40°C to 85°C	14-SOIC
SN74HC02D	Texas Instruments	Discontinued at DiGi Electronics	2V–6V	2 µA	15ns	-40°C to 85°C	14-SOIC
SN74HC02DR	Texas Instruments	Active	2V–6V	2 µA	15ns	-40°C to 85°C	14-SOIC

Engineering Selection Recommendations

Primary Recommendation: 74HC02D,653 (Nexperia USA Inc.) is the direct equivalent replacement. It maintains identical electrical specifications and 14-SOIC packaging while offering Active product status and significantly higher inventory availability (990,300 units).

For Automotive Applications: SN74HC02QDRQ1 (Texas Instruments) is qualified to AEC-Q100 automotive standards, suitable for automotive-grade designs requiring formal qualification documentation.

For Extended Temperature Range: CD74HC02M96 (Texas Instruments) or MC74HC02ADR2G (onsemi) extend the operating temperature range to -55°C to 125°C. MC74HC02ADR2G additionally offers improved quiescent current (1 µA vs. 2 µA) and faster propagation delay (13ns vs. 15ns).

For Standard Industrial Applications: SN74HC02DR (Texas Instruments) or MM74HC02MX (onsemi) provide Active product status with standard -40°C to 85°C operating range and established supply chain availability.

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited), and identical 14-SOIC package dimensions, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can 74HC02D,653 be used as a direct replacement for 74HC02D,652?

A: Yes. Both parts are manufactured by Nexperia USA Inc. and share identical electrical specifications, logic function, package type, and pin configuration. The primary difference is product status (Active vs. Obsolete) and packaging form factor (Digi-Reel vs. standard reel).

Q: What is the difference between the onsemi MC74HC02ADR2G and Texas Instruments SN74HC02DR?

A: Both are functionally equivalent 4-channel 2-input NOR gates in 14-SOIC packages. The MC74HC02ADR2G offers lower quiescent current (1 µA vs. 2 µA) and faster propagation delay (13ns vs. 15ns), with an extended operating temperature range of -55°C to 125°C compared to -40°C to 85°C for the SN74HC02DR.

Q: Are all substitute parts compatible with the original 14-SOIC PCB footprint?

A: Yes. All listed substitute parts use the 14-SOIC (0.154", 3.90mm Width) package, ensuring mechanical and electrical compatibility with existing PCB layouts without modification.

Q: Which substitute part offers the best availability?

A: 74HC02D,653 (Nexperia USA Inc.) has the highest inventory availability at 990,300 units in stock, followed by MM74HC02MX (onsemi) at 16,095 units.

Q: Can I use MM74HC02M or MM74HC02MX if my design requires -55°C operation?

A: No. MM74HC02M and MM74HC02MX are rated only to -40°C to 85°C. For -55°C operation, use CD74HC02M96, CD74HC02MT, MC74HC02ADG, or MC74HC02ADR2G.

Q: What is the significance of the AEC-Q100 qualification on SN74HC02QDRQ1?

A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards. This is required for automotive applications but not necessary for industrial or consumer electronics.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant except MM74HC02M, for which RoHS status is not specified in the provided data.

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