NL17SZ02DFT2 NOR Gate IC Equivalent & Substitute Parts

Part Overview

The NL17SZ02DFT2 is a single-channel 2-input NOR gate logic IC manufactured by onsemi in SC-88A (SC-70-5/SOT-353) surface mount packaging. This part is classified as obsolete, making substitute components necessary for new designs and production continuity. The NOR gate performs basic logic operations across a wide supply voltage range of 1.65V to 5.5V, with low quiescent current and fast propagation delay characteristics suitable for general-purpose logic applications.

Key Parameters

Parameter	Value
Logic Type	NOR Gate
Number of Circuits	1
Number of Inputs	2
Voltage - Supply	1.65V ~ 5.5V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	32mA, 32mA
Max Propagation Delay @ V, Max CL	4.3ns @ 5V, 50pF
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	5-TSSOP, SC-70-5, SOT-353
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the NL17SZ02DFT2 are selected based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

Critical Matching Parameters:

Logic Type: NOR Gate (1 channel, 2 inputs)
Voltage Supply Range: 1.65V ~ 5.5V minimum
Output Current: 32mA minimum for both high and low states
Mounting Type: Surface Mount
Package compatibility: SC-88A, SOT-353, SC-70-5, SOT-23-5, or 5-TSSOP

Substitution Categories:

Direct Replacement (Same Package): NL17SZ02DFT2G maintains identical electrical specifications and packaging, differing only in product status (Active vs. Obsolete) and RoHS compliance.

Package-Compatible Alternatives: Parts with different package designations (SOT-23-5, SC-74A, 5-TSSOP) but identical electrical performance and pinout compatibility. These include onsemi NC7SZ series, Nexperia 74LVC1G02 variants, Diodes Incorporated 74LVC1G02SE-7 and 74LVCE1G02SE-7, and Texas Instruments SN74LVC1G02 series.

Extended Temperature Range Alternatives: Parts maintaining the full -55°C to 125°C operating range or exceeding it, ensuring compatibility in demanding thermal environments.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Voltage Supply	Quiescent Current (Max)	Output Current (High/Low)	Propagation Delay @ 5V, 50pF	Operating Temperature	Package	Product Status	RoHS Status
NL17SZ02DFT2	onsemi	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	1 µA	32mA, 32mA	4.3ns	-55°C ~ 125°C	SC-88A (SC-70-5)	Obsolete	Non-compliant
NL17SZ02DFT2G	onsemi	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	1 µA	32mA, 32mA	4.3ns	-55°C ~ 125°C	SC-88A (SC-70-5)	Active	ROHS3 Compliant
NC7SZ02M5X	onsemi	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	2 µA	32mA, 32mA	4.3ns	-40°C ~ 85°C	SOT-23-5	Active	ROHS3 Compliant
NC7SZ02P5X	onsemi	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	2 µA	32mA, 32mA	4.3ns	-40°C ~ 85°C	SC-70-5	Active	ROHS3 Compliant
74LVC1G02GV,125	Nexperia USA Inc.	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	4 µA	32mA, 32mA	4ns	-40°C ~ 125°C	SC-74A	Active	ROHS3 Compliant
74LVC1G02GW,125	Nexperia USA Inc.	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	4 µA	32mA, 32mA	4ns	-40°C ~ 125°C	5-TSSOP	Active	ROHS3 Compliant
74LVC1G02SE-7	Diodes Incorporated	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	200 µA	32mA, 32mA	1.7ns	-40°C ~ 125°C	SOT-353	Active	ROHS3 Compliant
74LVCE1G02SE-7	Diodes Incorporated	NOR Gate 1CH 2-INP	1.4V ~ 5.5V	10 µA	32mA, 32mA	3.6ns	-40°C ~ 85°C	SOT-353	Active	ROHS3 Compliant
SN74LVC1G02DBVR	Texas Instruments	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	10 µA	32mA, 32mA	4.5ns	-40°C ~ 125°C	SOT-23-5	Active	ROHS3 Compliant
SN74LVC1G02DBVRG4	Texas Instruments	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	10 µA	32mA, 32mA	4.5ns	-40°C ~ 125°C	SOT-23-5	Discontinued at DiGi Electronics	ROHS3 Compliant
SN74LVC1G02DBVT	Texas Instruments	NOR Gate 1CH 2-INP	1.65V ~ 5.5V	10 µA	32mA, 32mA	4.5ns	-40°C ~ 125°C	SOT-23-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: NL17SZ02DFT2G

The NL17SZ02DFT2G is the direct active equivalent from onsemi. It maintains identical electrical specifications and packaging while offering Active product status and ROHS3 compliance. This part provides the most straightforward replacement path with no design modifications required.

Extended Temperature Range Applications (-55°C to 125°C):

For designs requiring the full temperature range of the original NL17SZ02DFT2, select from:

NL17SZ02DFT2G (onsemi, SC-88A package)
74LVC1G02GV,125 (Nexperia, SC-74A package)
74LVC1G02GW,125 (Nexperia, 5-TSSOP package)
SN74LVC1G02DBVR (Texas Instruments, SOT-23-5 package)
SN74LVC1G02DBVT (Texas Instruments, SOT-23-5 package)

All maintain 1.65V to 5.5V supply voltage compatibility and 32mA output current specifications.

Reduced Temperature Range Applications (-40°C to 85°C):

For applications with reduced temperature requirements, onsemi NC7SZ series parts offer lower quiescent current (2 µA vs. 1 µA) and active product status:

NC7SZ02M5X (SOT-23-5 package)
NC7SZ02P5X (SC-70-5 package)

Low Quiescent Current Priority:

The original NL17SZ02DFT2 specifies 1 µA maximum quiescent current. The NL17SZ02DFT2G maintains this specification. All other substitutes exceed this value, with 74LVC1G02SE-7 reaching 200 µA.

Avoid:

SN74LVC1G02DBVRG4 is discontinued at DiGi Electronics and should not be selected for new designs despite active status at other distributors.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different package than the original SC-88A?

A: Yes, provided the substitute maintains compatible pinout and electrical specifications. SOT-23-5, SC-74A, 5-TSSOP, and SOT-353 packages are all compatible with the NL17SZ02DFT2 function. Verify PCB footprint compatibility before design implementation.

Q: What is the difference between NL17SZ02DFT2 and NL17SZ02DFT2G?

A: Both parts are electrically identical with 1 µA quiescent current and 4.3ns propagation delay. The primary differences are product status (Obsolete vs. Active) and RoHS compliance (Non-compliant vs. ROHS3 Compliant). The NL17SZ02DFT2G is the recommended replacement.

Q: Why do some substitutes have higher quiescent current specifications?

A: Quiescent current varies by manufacturer design and process technology. Parts like 74LVC1G02SE-7 (200 µA) and 74LVCE1G02SE-7 (10 µA) still meet the 32mA output current requirement and maintain logic functionality. Select based on power budget requirements for your application.

Q: Can I use NC7SZ02M5X or NC7SZ02P5X if my design operates at -55°C?

A: No. These parts specify -40°C minimum operating temperature. For full -55°C to 125°C range compatibility, use NL17SZ02DFT2G, 74LVC1G02GV,125, 74LVC1G02GW,125, SN74LVC1G02DBVR, or SN74LVC1G02DBVT.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 Compliant status. The original NL17SZ02DFT2 is RoHS non-compliant, making RoHS3-compliant substitutes necessary for regulated applications.

Q: What is the propagation delay difference between substitutes?

A: Propagation delay ranges from 1.7ns (74LVC1G02SE-7) to 4.5ns (SN74LVC1G02DBVR) at 5V with 50pF load. The original specifies 4.3ns. Faster alternatives like 74LVC1G02SE-7 provide timing margin; slower alternatives remain within typical logic circuit requirements.

Q: Which substitute offers the lowest power consumption?

A: NL17SZ02DFT2G maintains the original 1 µA quiescent current specification. NC7SZ series parts specify 2 µA. All other substitutes exceed 4 µA. For lowest power consumption, NL17SZ02DFT2G is the optimal choice.

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