74LVC02ADB,112 NOR Gate IC Equivalent & Substitute Parts

Part Overview

The 74LVC02ADB,112 is a 4-channel 2-input NOR gate logic IC manufactured by Nexperia USA Inc. in 14-SSOP surface mount packaging. This part is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The 74LVC series operates across a wide supply voltage range of 1.2V to 3.6V, making it suitable for low-voltage digital logic applications. Equivalent and substitute parts maintain the same logic function, pin configuration, and electrical performance characteristics while offering active product status or alternative packaging options.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	1.2V ~ 3.6V
Current - Quiescent (Max)	40 µA
Current - Output High/Low	24mA / 24mA
Input Logic Level - Low	0.12V ~ 0.8V
Input Logic Level - High	1.08V ~ 2V
Max Propagation Delay @ 3.3V, 50pF	4.4ns
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	14-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74LVC02ADB,112 is determined by the following critical parameters:

Functional Equivalence: All substitute parts must be 4-channel, 2-input NOR gate logic ICs with identical logic function and pin configuration.

Electrical Compatibility: Supply voltage range, input/output logic levels, output current capability, and propagation delay are the primary electrical criteria. Parts with overlapping or compatible voltage ranges and similar propagation delays within acceptable tolerances are considered substitutes.

Package Compatibility: The 14-SSOP and 14-TSSOP packages are mechanically and electrically compatible for PCB layout purposes, though they differ in physical dimensions (SSOP: 5.30mm width, TSSOP: 4.40mm width).

Product Status: Active parts are preferred over obsolete parts for new designs. Discontinued parts may be used only when inventory is available and long-term supply is not a concern.

Compliance & Certifications: RoHS3 compliance and moisture sensitivity level (MSL 1) are standard across all listed parts, ensuring environmental and handling compatibility.

Parameter Comparison

Part Number	Manufacturer	Package	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 3.3V, 50pF	Operating Temp	Product Status
74LVC02ADB,112	Nexperia USA Inc.	14-SSOP	1.2V ~ 3.6V	40 µA	4.4ns	-40°C ~ 125°C	Obsolete
74LVC02APW,118	NXP Semiconductors	14-TSSOP	1.2V ~ 3.6V	40 µA	5.5ns	-40°C ~ 125°C	Active
74LCX02MTCX	Fairchild Semiconductor	14-TSSOP	2V ~ 3.6V	10 µA	5.2ns	-40°C ~ 85°C	Active
SN74LVC02ADBR	Texas Instruments	14-SSOP	1.65V ~ 3.6V	1 µA	4.2ns	-40°C ~ 125°C	Active
SN74LVC02AMPWREP	Texas Instruments	14-TSSOP	2V ~ 3.6V	10 µA	5.5ns	-55°C ~ 125°C	Active
SN74LVC02APW	Texas Instruments	14-TSSOP	1.65V ~ 3.6V	1 µA	4.2ns	-40°C ~ 125°C	Active
SN74LVC02APWE4	Texas Instruments	14-TSSOP	1.65V ~ 3.6V	1 µA	4.2ns	-40°C ~ 125°C	Discontinued at DiGi Electronics
SN74LVC02APWR	Texas Instruments	14-TSSOP	1.65V ~ 3.6V	1 µA	4.2ns	-40°C ~ 125°C	Active
SN74LVC02APWT	Texas Instruments	14-TSSOP	1.65V ~ 3.6V	1 µA	4.2ns	-40°C ~ 125°C	Active
SN74LVC02AQPWRG4Q1	Texas Instruments	14-TSSOP	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 125°C	Active
SN74LVC02AQPWRQ1	Texas Instruments	14-TSSOP	2V ~ 3.6V	10 µA	5.5ns	-40°C ~ 125°C	Active

Engineering Selection Recommendations

For Direct Package Replacement (14-SSOP): SN74LVC02ADBR from Texas Instruments is the primary substitute. It maintains the same 14-SSOP package footprint, operates across -40°C to 125°C, and is actively manufactured. The lower quiescent current (1 µA vs. 40 µA) and faster propagation delay (4.2ns vs. 4.4ns) provide performance improvements over the obsolete Nexperia part.

For Package-Flexible Designs (14-TSSOP): SN74LVC02APW, SN74LVC02APWR, and SN74LVC02APWT from Texas Instruments are active alternatives in 14-TSSOP packaging. These parts offer identical electrical performance to SN74LVC02ADBR with the same supply voltage range (1.65V ~ 3.6V) and operating temperature (-40°C ~ 125°C). The 14-TSSOP package is narrower (4.40mm vs. 5.30mm), requiring PCB layout adjustment.

For Extended Temperature Range: SN74LVC02AMPWREP extends the lower operating temperature to -55°C, suitable for military or extreme environment applications.

For Automotive Applications: SN74LVC02AQPWRG4Q1 and SN74LVC02AQPWRQ1 carry AEC-Q100 automotive qualification and are recommended for automotive-grade designs.

For Low-Voltage Designs (2V minimum): 74LVC02APW,118 from NXP, 74LCX02MTCX from Fairchild, and the automotive-qualified SN74LVC02AQPWRG4Q1/Q1 variants support 2V minimum supply voltage. The 74LCX02MTCX operates only to 85°C maximum temperature.

All substitute parts maintain RoHS3 compliance and MSL 1 moisture sensitivity level, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can I use a 14-TSSOP package part as a direct replacement for the 14-SSOP package 74LVC02ADB,112?

A: Electrically, yes. The 14-TSSOP and 14-SSOP packages are pin-compatible for the 74LVC02 NOR gate function. However, PCB layout modification is required because the TSSOP package is narrower (4.40mm vs. 5.30mm). Footprint adjustment and trace routing changes are necessary.

Q: What is the difference between the Texas Instruments SN74LVC02 variants (APW, APWR, APWT)?

A: These variants differ only in packaging format: APW is supplied in Tube, APWR in Tape & Reel (TR), and APWT in Tape & Reel (TR). All three have identical electrical specifications and are functionally equivalent. Selection depends on procurement and assembly requirements.

Q: Is the 74LCX02MTCX from Fairchild a suitable substitute?

A: The 74LCX02MTCX is functionally equivalent but has a narrower operating temperature range (-40°C to 85°C vs. -40°C to 125°C) and a higher minimum supply voltage (2V vs. 1.2V). It is suitable only for applications within these constraints.

Q: Why do some parts have lower quiescent current (1 µA vs. 40 µA)?

A: Quiescent current varies by manufacturer design and process technology. Lower quiescent current indicates more efficient power consumption during idle states. Both values are within acceptable ranges for standard logic applications.

Q: Are the automotive-qualified parts (SN74LVC02AQPWRG4Q1, SN74LVC02AQPWRQ1) suitable for non-automotive applications?

A: Yes. Automotive-qualified parts meet stricter reliability and testing standards and are fully compatible with non-automotive designs. They may be used in any application requiring the same electrical specifications.

Q: What does "Discontinued at DiGi Electronics" mean for SN74LVC02APWE4?

A: This part is no longer stocked by DiGi Electronics but may remain available from other distributors or as existing inventory. It is not recommended for new designs due to uncertain long-term availability.

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