NLAS323US Equivalent & Substitute Parts

Part Overview

The NLAS323US is a 2-circuit SPST-NO (Single Pole Single Throw - Normally Open) analog switch IC manufactured by onsemi, housed in an 8-VFSOP surface mount package. This component operates across a 2V to 5.5V supply range with a maximum on-state resistance of 25Ohm and supports switching frequencies up to 220MHz. The NLAS323US is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPST - NO
Number of Circuits	2
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	25Ohm
Supply Voltage Range (V+)	2V ~ 5.5V
Switch Time (Ton, Toff) Max	9ns, 10ns
-3dB Bandwidth	220MHz
Charge Injection	3pC
Channel Capacitance (CS(off), CD(off))	10pF, 10pF
Current - Leakage (IS(off)) Max	1nA
Operating Temperature Range	-55°C ~ 125°C
Package / Case	8-VFSOP (0.091", 2.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the NLAS323US is determined by the following critical parameters:

Switch Configuration: SPST - NO with 2 circuits in 1:1 multiplexer arrangement
Package Compatibility: 8-VFSOP surface mount package with identical 0.091" (2.30mm) width
Supply Voltage Range: Minimum 2V operation capability
On-State Resistance: Maximum 25Ohm specification
Switching Performance: Switch time and bandwidth characteristics suitable for the application frequency range

Substitute parts are grouped into two categories:

Direct Equivalent (Packaging Variant): NLAS323USG maintains identical electrical specifications and base product characteristics as the NLAS323US, differing only in packaging format (Tape & Reel vs. standard packaging).

Functional Equivalents (Performance Enhancement): 74LVC2G66DC-Q100H and SN74LVC2G66QDCURQ1 provide superior electrical performance characteristics while maintaining package compatibility and core functional requirements. These parts feature lower on-state resistance, faster switching times, and extended supply voltage range (1.65V minimum), making them suitable for applications requiring enhanced performance margins.

Parameter Comparison

Parameter	NLAS323US	NLAS323USG	74LVC2G66DC-Q100H	SN74LVC2G66QDCURQ1
Manufacturer	onsemi	onsemi	Nexperia USA Inc.	Texas Instruments
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	2	2	2	2
Multiplexer/Demultiplexer	1:1	1:1	1:1	1:1
On-State Resistance (Max)	25Ohm	25Ohm	10Ohm	15Ohm
Supply Voltage Range (V+)	2V ~ 5.5V	2V ~ 5.5V	1.65V ~ 5.5V	1.65V ~ 5.5V
Switch Time Ton (Max)	9ns	9ns	3.9ns	5.9ns
Switch Time Toff (Max)	10ns	10ns	5ns	8.3ns
-3dB Bandwidth	220MHz	220MHz	500MHz	300MHz
Charge Injection	3pC	3pC	7.5pC	Not Specified
Channel Capacitance (CS(off))	10pF	10pF	5pF	6pF
Current - Leakage (IS(off)) Max	1nA	1nA	5µA	100nA
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	8-VFSOP	8-VFSOP	8-VFSOP	8-VFSOP
Product Status	Obsolete	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q100 Qualification	Not Specified	Not Specified	Yes	Yes

Engineering Selection Recommendations

NLAS323USG is the direct equivalent for applications requiring identical electrical performance and specifications. This variant maintains the original NLAS323US characteristics while offering improved RoHS3 compliance status. Selection is appropriate for designs where the original performance envelope is sufficient and packaging format (Tape & Reel) is acceptable.

74LVC2G66DC-Q100H and SN74LVC2G66QDCURQ1 are active product alternatives suitable for new designs and production transitions. Both parts provide:

Active product status with ongoing manufacturer support
ROHS3 compliance and REACH unaffected status
AEC-Q100 automotive qualification
Superior electrical performance (lower on-state resistance, faster switching times, extended bandwidth)
Extended supply voltage range (1.65V minimum vs. 2V minimum)

The 74LVC2G66DC-Q100H offers the lowest on-state resistance (10Ohm) and highest bandwidth (500MHz), suitable for applications requiring maximum performance margins. The SN74LVC2G66QDCURQ1 provides a balanced performance profile with 15Ohm on-state resistance and 300MHz bandwidth, with automotive-grade qualification from Texas Instruments.

Frequently Asked Questions (FAQ)

Q: Can NLAS323USG be used as a direct replacement for NLAS323US?

A: Yes. NLAS323USG is electrically and functionally identical to NLAS323US. The difference is packaging format (Tape & Reel). Both maintain the same 25Ohm on-state resistance, 2V to 5.5V supply range, and 8-VFSOP package dimensions. NLAS323USG offers improved RoHS3 compliance.

Q: What are the key differences between NLAS323US and the 74LVC series substitutes?

A: The 74LVC2G66 variants provide superior performance: lower on-state resistance (10Ohm or 15Ohm vs. 25Ohm), faster switching times, higher bandwidth (300MHz-500MHz vs. 220MHz), and extended supply voltage range (1.65V minimum vs. 2V minimum). Both 74LVC variants are active products with AEC-Q100 qualification, whereas NLAS323US is obsolete.

Q: Are the 74LVC2G66 parts pin-compatible with NLAS323US?

A: Yes. All substitute parts use the 8-VFSOP package with identical 0.091" (2.30mm) width and pin configuration, ensuring direct PCB compatibility without layout modifications.

Q: Which substitute part should be selected for new designs?

A: For new designs, select either 74LVC2G66DC-Q100H (Nexperia) or SN74LVC2G66QDCURQ1 (Texas Instruments). Both are active products with full manufacturer support, RoHS3 compliance, and AEC-Q100 automotive qualification. Selection between them depends on supply chain availability and performance requirements.

Q: What is the operating temperature difference between NLAS323US and substitute parts?

A: NLAS323US operates from -55°C to 125°C. The 74LVC2G66 variants operate from -40°C to 125°C. For applications requiring -55°C minimum operation, NLAS323USG maintains the original temperature range.

Q: Are there supply voltage compatibility concerns when substituting?

A: NLAS323US and NLAS323USG require minimum 2V supply. The 74LVC2G66 variants operate at 1.65V minimum, providing broader supply voltage compatibility. Applications using 2V to 5.5V supply are compatible with all substitute options.

Q: What packaging formats are available for these parts?

A: NLAS323US is available in standard packaging. NLAS323USG is supplied in Tape & Reel format. 74LVC2G66DC-Q100H is supplied in Tape & Reel format. SN74LVC2G66QDCURQ1 is supplied in Cut Tape and Digi-Reel format. All maintain the same 8-VFSOP package footprint.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message