74HC4002DB,118 NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74HC4002DB,118 is a dual 4-input NOR gate logic IC manufactured by Nexperia USA Inc. in a 14-SSOP surface mount package. This component implements two independent NOR gate circuits, each with four inputs, and operates across a 2V to 6V supply voltage range with a maximum propagation delay of 17ns at 6V with 50pF load.

The 74HC4002DB,118 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Functionally equivalent alternatives are available from both Nexperia and Texas Instruments in active product status with improved availability.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	2
Number of Inputs	4
Voltage - Supply	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	5.2mA, 5.2mA
Input Logic Level - Low	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	17ns
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC4002DB,118 is determined by the following criteria:

Electrical Compatibility Requirements:

Logic Type: NOR Gate (2 channels, 4 inputs per channel)
Voltage - Supply: 2V ~ 6V
Current - Quiescent (Max): 2 µA
Current - Output High, Low: 5.2mA, 5.2mA
Input Logic Level - Low: 0.5V ~ 1.8V
Input Logic Level - High: 1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF: 17ns
Operating Temperature: -40°C ~ 125°C (or extended range)

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount
Package Type: 14-pin SSOP or 14-pin TSSOP variants
Pin count and pinout: 14 pins

Compliance Requirements:

RoHS3 Compliant
MSL: 1 (Unlimited)

All substitute parts listed maintain identical electrical specifications and are pin-compatible within their respective package variants (SSOP to TSSOP). Package width differences (5.30mm SSOP vs. 4.40mm TSSOP) are mechanical variations that do not affect electrical function but require PCB layout verification.

Parameter Comparison

Parameter	74HC4002DB,118 (Main)	74HC4002PW,118	CD74HC4002PW	CD74HC4002PWR	CD74HC4002PWT
Manufacturer	Nexperia USA Inc.	Nexperia USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	NOR Gate	NOR Gate	NOR Gate	NOR Gate	NOR Gate
Number of Circuits	2	2	2	2	2
Number of Inputs	4	4	4	4	4
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Quiescent (Max)	2 µA	2 µA	2 µA	2 µA	2 µA
Current - Output High, Low	5.2mA, 5.2mA	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	0.5V ~ 1.8V
Input Logic Level - High	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V	1.5V ~ 4.2V
Max Propagation Delay @ 6V, 50pF	17ns	17ns	17ns	17ns	17ns
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SSOP (5.30mm)	14-TSSOP (4.40mm)	14-TSSOP (4.40mm)	14-TSSOP (4.40mm)	14-TSSOP (4.40mm)
Product Status	Obsolete	Active	Discontinued at DiGi Electronics	Active	Discontinued at DiGi Electronics
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: CD74HC4002PWR

The CD74HC4002PWR from Texas Instruments is the preferred substitute for the obsolete 74HC4002DB,118. This part is in active product status with 2,561 units in stock, ensuring long-term availability. It maintains identical electrical specifications and operates across an extended temperature range (-55°C ~ 125°C), providing additional margin for demanding applications. The 14-TSSOP package is pin-compatible with the original SSOP variant, though PCB layout adjustment is required due to the reduced package width (4.40mm vs. 5.30mm).

Secondary Recommendation: 74HC4002PW,118

The 74HC4002PW,118 from Nexperia USA Inc. is an active alternative with 2,381 units in stock. This part maintains the same electrical and temperature specifications as the main part and uses the same 14-TSSOP package footprint as other substitutes. Selection of this part preserves single-manufacturer sourcing if preferred.

Alternative Options: CD74HC4002PW and CD74HC4002PWT

Both Texas Instruments parts (CD74HC4002PW and CD74HC4002PWT) are functionally equivalent but carry discontinued status at DiGi Electronics. These parts are suitable only if existing inventory is available through alternative distribution channels and long-term availability is not a concern.

Compliance Verification:

All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance profile. No additional qualification is required from a regulatory standpoint.

Frequently Asked Questions (FAQ)

Q: Can I directly replace the 74HC4002DB,118 with any of the listed substitutes?

A: Yes, all listed substitutes are electrically and functionally equivalent. However, package footprint differences require PCB layout verification. The original 74HC4002DB,118 uses a 14-SSOP package (5.30mm width), while all substitutes use 14-TSSOP packages (4.40mm width). Pin spacing and pinout are identical, but the reduced width may require PCB trace routing adjustments.

Q: What is the difference between SSOP and TSSOP packages?

A: Both are 14-pin surface mount packages with identical pinouts and electrical performance. The primary difference is package width: SSOP measures 5.30mm while TSSOP measures 4.40mm. This affects PCB footprint size and trace routing but does not impact electrical function or pin compatibility.

Q: Why is the 74HC4002DB,118 marked as obsolete?

A: The original part has been discontinued by the manufacturer. Substitute parts from both Nexperia and Texas Instruments provide identical functionality and are actively produced, ensuring continued availability for new designs and production runs.

Q: Do the Texas Instruments substitutes have different operating temperature ranges?

A: Yes. The 74HC4002DB,118 and 74HC4002PW,118 operate from -40°C to 125°C, while CD74HC4002PW, CD74HC4002PWR, and CD74HC4002PWT operate from -55°C to 125°C. The extended lower temperature limit in Texas Instruments parts provides additional margin for cold environment applications.

Q: Which substitute should I choose for new designs?

A: CD74HC4002PWR is the recommended choice for new designs due to active product status, high inventory availability (2,561 units), and extended operating temperature range. If single-manufacturer sourcing is preferred, 74HC4002PW,118 from Nexperia is an equally valid alternative.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance requirements.

Q: What is the propagation delay specification, and does it differ between parts?

A: All parts, including the original and all substitutes, have a maximum propagation delay of 17ns at 6V supply voltage with a 50pF load. This specification is identical across all variants and ensures equivalent timing performance in circuit applications.

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