SN74HC02PWT NOR Gate IC Equivalent & Substitute Parts

Part Overview

The SN74HC02PWT is a 4-channel NOR gate logic IC manufactured by Texas Instruments in 14-TSSOP surface mount packaging. This part is discontinued at DiGi Electronics but remains available through inventory channels. The SN74HC02PWT operates across a 2V to 6V supply voltage range and is suitable for general-purpose logic applications requiring NOR gate functionality. Due to its discontinued status, equivalent and substitute parts from active manufacturers provide direct functional replacement options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	4
Number of Inputs	2
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	15ns
Operating Temperature	-40°C ~ 85°C
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74HC02PWT is determined by strict equivalence across the following critical parameters:

Logic Type: NOR Gate with 4 channels and 2 inputs per channel
Package: 14-TSSOP surface mount form factor
Voltage Supply Range: 2V ~ 6V minimum requirement
Output Current Capability: 5.2mA minimum for both high and low states
Input Logic Levels: 0.5V ~ 1.8V (low) and 1.5V ~ 4.2V (high)
Propagation Delay: 15ns maximum at 6V with 50pF load
Operating Temperature: -40°C ~ 85°C minimum range
RoHS3 Compliance and MSL Level 1

Substitute parts are grouped by their relationship to the main part: parametric equivalents maintain identical electrical specifications, direct manufacturer alternatives provide equivalent functionality from different manufacturers, upgrade variants offer enhanced specifications or automotive qualification, and manufacturer-recommended parts represent current production alternatives.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 6V, 50pF	Operating Temperature	Packaging	RoHS3
SN74HC02PWT	Texas Instruments	Discontinued	2V ~ 6V	2 µA	15ns	-40°C ~ 85°C	Tape & Reel (TR)	Compliant
SN74HC02PWR	Texas Instruments	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 85°C	Cut Tape (CT) & Digi-Reel®	Compliant
MC74HC02ADTR2G	onsemi	Active	2V ~ 6V	1 µA	13ns	-55°C ~ 125°C	Cut Tape (CT) & Digi-Reel®	Compliant
MM74HC02MTC	Fairchild Semiconductor	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 85°C	Bulk	Not specified
MM74HC02MTCX	onsemi	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 85°C	Tape & Reel (TR)	Compliant
74HC02PW-Q100,118	Nexperia USA Inc.	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 125°C	Tape & Reel (TR)	Compliant
74HC02PW,118	Nexperia USA Inc.	Active	2V ~ 6V	2 µA	15ns	-40°C ~ 125°C	Tape & Reel (TR)	Compliant
NLV74HC02ADTR2G	onsemi	Obsolete	2V ~ 6V	1 µA	13ns	-55°C ~ 125°C	Tape & Reel (TR)	Compliant

Engineering Selection Recommendations

For direct replacement of the discontinued SN74HC02PWT, the SN74HC02PWR from Texas Instruments provides parametric equivalence with identical electrical specifications and active product status. This part differs only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel), maintaining full functional compatibility.

The MC74HC02ADTR2G and NLV74HC02ADTR2G from onsemi offer enhanced specifications with lower quiescent current (1 µA versus 2 µA) and faster propagation delay (13ns versus 15ns), along with extended operating temperature range (-55°C ~ 125°C). Both parts maintain RoHS3 compliance and MSL Level 1 rating. The NLV74HC02ADTR2G carries obsolete status despite active inventory availability.

The MM74HC02MTCX from onsemi in Tape & Reel packaging provides electrical equivalence to the original part with active product status and RoHS3 compliance. The MM74HC02MTC variant from Fairchild Semiconductor offers the same electrical specifications in bulk packaging format.

The Nexperia USA Inc. parts (74HC02PW-Q100,118 and 74HC02PW,118) provide equivalent functionality with extended operating temperature range to -40°C ~ 125°C and active product status. The 74HC02PW-Q100,118 variant includes AEC-Q100 automotive qualification.

All substitute parts maintain the 14-TSSOP package form factor, surface mount mounting type, and core logic functionality of the original SN74HC02PWT. Selection should prioritize active product status and packaging format compatibility with assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can the SN74HC02PWR directly replace the SN74HC02PWT?

A: Yes. Both parts share identical electrical specifications including voltage supply range, quiescent current, output current capability, input logic levels, and propagation delay. The only difference is packaging format: SN74HC02PWR uses Cut Tape & Digi-Reel® while SN74HC02PWT uses Tape & Reel. Both are 14-TSSOP surface mount packages with identical pin configuration and footprint.

Q: What is the advantage of using MC74HC02ADTR2G or NLV74HC02ADTR2G?

A: These onsemi parts offer lower quiescent current (1 µA versus 2 µA) and faster propagation delay (13ns versus 15ns). They also support extended operating temperature range from -55°C to 125°C compared to the original -40°C to 85°C range. These specifications make them suitable for applications requiring lower power consumption or wider temperature operation.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts except MM74HC02MTC explicitly state RoHS3 compliance. The MM74HC02MTC from Fairchild Semiconductor does not specify RoHS status in the provided data. Verify RoHS compliance requirements with your specific application before selection.

Q: What is the difference between the Nexperia parts 74HC02PW-Q100,118 and 74HC02PW,118?

A: Both parts are electrically identical with 2V ~ 6V supply voltage, 2 µA quiescent current, and 15ns propagation delay. The 74HC02PW-Q100,118 includes AEC-Q100 automotive qualification and operates to -40°C ~ 125°C. The 74HC02PW,118 operates to -40°C ~ 125°C without automotive qualification. Both are active products in Tape & Reel packaging.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel, Cut Tape & Digi-Reel®, or Bulk) does not affect electrical performance or pin configuration. Selection should be based on assembly process requirements and inventory handling procedures. All 14-TSSOP packages maintain identical footprint and electrical characteristics.

Q: Can I use MM74HC02MTC in bulk packaging for production assembly?

A: Yes, provided your assembly process supports bulk component handling. The MM74HC02MTC maintains identical electrical specifications to the original SN74HC02PWT. Verify that bulk packaging meets your manufacturing workflow and quality control requirements before implementation.

Q: Why is NLV74HC02ADTR2G listed as obsolete despite available inventory?

A: Product status reflects manufacturer designation. Obsolete status indicates the manufacturer has discontinued active production and support, though existing inventory may remain available. For new designs, prioritize active product status parts such as MC74HC02ADTR2G from onsemi, which offers equivalent enhanced specifications.

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