74HC4002N,652 NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74HC4002N,652 is a NOR Gate IC featuring 2 channels with 4 inputs per channel in a 14-DIP through-hole package, manufactured by NXP USA Inc. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74HC series logic gate remains functionally relevant across industrial and legacy system applications where CMOS NOR gate logic is required.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	2
Number of Inputs	4
Voltage Supply Range	2V ~ 6V
Operating Temperature Range	-40°C ~ 125°C
Max Propagation Delay	17ns @ 6V, 50pF
Mounting Type	Through Hole
Package Type	14-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 74HC4002N,652 is determined by strict equivalence across the following parameters:

Logic Function: NOR Gate with identical 2-channel, 4-input configuration
Electrical Specifications: Voltage supply (2V ~ 6V), quiescent current (2 µA max), output current (5.2mA), input logic levels, and propagation delay (17ns @ 6V, 50pF)
Package Compatibility: Physical form factor and pin count (14-pin configuration)
Compliance: RoHS3 compliance and REACH unaffected status

Substitute parts are grouped into two categories based on mounting type: through-hole (DIP) and surface-mount (SOIC) packages. Both categories maintain identical electrical performance and logic function.

Parameter Comparison

Parameter	74HC4002N,652 (NXP)	CD74HC4002E (TI)	74HC4002D,652 (Nexperia)	CD74HC4002M (Harris)
Manufacturer	NXP USA Inc.	Texas Instruments	Nexperia USA Inc.	Harris Corporation
Logic Type	NOR Gate	NOR Gate	NOR Gate	NOR Gate
Circuits / Inputs	2 / 4	2 / 4	2 / 4	2 / 4
Voltage Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Quiescent Current (Max)	2 µA	2 µA	2 µA	2 µA
Output Current (High/Low)	5.2mA / 5.2mA	5.2mA / 5.2mA	5.2mA / 5.2mA	5.2mA / 5.2mA
Input Logic Level (Low)	0.5V ~ 1.8V	0.5V ~ 1.8V	0.5V ~ 1.8V	0.5V ~ 1.8V
Input Logic Level (High)	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V
Max Propagation Delay	17ns @ 6V, 50pF	17ns @ 6V, 50pF	17ns @ 6V, 50pF	17ns @ 6V, 50pF
Operating Temperature	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Surface Mount	Surface Mount
Package	14-DIP	14-PDIP	14-SO	14-SOIC
Product Status	Obsolete	Active	Obsolete	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Non-Compliant

Engineering Selection Recommendations

For Through-Hole Applications (Direct Pin-Compatible Replacement):

The CD74HC4002E (Texas Instruments) is the primary substitute for the 74HC4002N,652. Both parts feature 14-PDIP through-hole packaging with identical pin configurations. The CD74HC4002E maintains active product status, ensuring long-term availability and supply chain stability. Operating temperature range extends to -55°C, providing broader environmental coverage than the original part. RoHS3 compliance is maintained.

For Surface-Mount Applications (Package Migration):

The 74HC4002D,652 (Nexperia) and CD74HC4002M (Harris) provide surface-mount alternatives in 14-SO and 14-SOIC packages respectively. These parts require PCB layout redesign and are suitable for new designs or board revisions. The 74HC4002D,652 maintains RoHS3 compliance. The CD74HC4002M does not meet RoHS3 requirements and should be selected only when legacy compliance standards are acceptable.

Compliance Considerations:

All through-hole and Nexperia surface-mount options maintain ROHS3 compliance and REACH unaffected status. The Harris CD74HC4002M is RoHS non-compliant and should be avoided in applications requiring modern environmental compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC4002E directly replace the 74HC4002N,652 without PCB modifications?

A: Yes. Both parts use 14-pin DIP through-hole packaging with identical pin assignments. No PCB layout changes are required. The CD74HC4002E is a direct functional and mechanical substitute.

Q: What is the difference between 14-DIP, 14-PDIP, 14-SO, and 14-SOIC packages?

A: 14-DIP and 14-PDIP are through-hole packages with 0.300" (7.62mm) row spacing, suitable for breadboards and traditional PCB designs. 14-SO and 14-SOIC are surface-mount packages with 0.154" (3.90mm) width, requiring surface-mount assembly processes. Through-hole and surface-mount packages are not interchangeable without PCB redesign.

Q: Why does the CD74HC4002E have a wider operating temperature range (-55°C ~ 125°C) compared to the original part (-40°C ~ 125°C)?

A: The extended lower temperature limit reflects Texas Instruments' manufacturing and testing specifications for this device. This provides additional margin for applications operating in cold environments. The upper temperature limit remains identical.

Q: Is the CD74HC4002M suitable for new designs?

A: The CD74HC4002M is obsolete and RoHS non-compliant. It should not be selected for new designs. Use the CD74HC4002E (through-hole) or 74HC4002D,652 (surface-mount) for current applications.

Q: Are all substitute parts electrically identical to the 74HC4002N,652?

A: Yes. All listed substitutes maintain identical electrical specifications: 2V ~ 6V supply voltage, 2 µA quiescent current, 5.2mA output current, and 17ns propagation delay at 6V with 50pF load. Logic function and pin configuration are identical across all parts.

Q: What should I consider when migrating from through-hole to surface-mount packaging?

A: Surface-mount migration requires PCB layout redesign, updated assembly processes, and different soldering techniques. Electrical performance remains identical, but manufacturing and repair procedures differ significantly. Evaluate supply chain availability and assembly capabilities before committing to surface-mount alternatives.

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