74LVCV2G66DP,125 Equivalent & Substitute Parts

Part Overview

The 74LVCV2G66DP,125 is a 2-circuit SPST-NO IC switch manufactured by Nexperia USA Inc., designed for low-voltage analog signal switching applications. This part features a 10Ohm on-state resistance, operates across a 2.3V to 5.5V supply range, and is housed in an 8-TSSOP package. The device is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Alternative parts must maintain functional compatibility while meeting the same electrical performance requirements for SPST switching topology, on-state resistance characteristics, and operating temperature specifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVCV2G66DP,125
Manufacturer	Nexperia USA Inc.
Category	Interface
Switch Circuit	SPST - NO
Number of Circuits	2
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	10Ohm
Voltage - Supply, Single (V+)	2.3V ~ 5.5V
Switch Time (Ton, Toff) (Max)	5ns, 9ns
-3dB Bandwidth	210MHz
Charge Injection	0.0035pC
Channel Capacitance (CS(off), CD(off))	8pF
Current - Leakage (IS(off)) (Max)	10µA
Crosstalk	-55dB @ 1MHz
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74LVCV2G66DP,125 is determined by the following critical parameters:

Primary Substitution Criteria:

Switch topology: SPST - NO (Single Pole Single Throw - Normally Open)
Number of circuits: 2
Multiplexer configuration: 1:1
On-state resistance: Maximum 10Ohm
Supply voltage range: Minimum 2.3V to 5.5V compatibility
Operating temperature: -40°C to 125°C minimum
Package compatibility: 8-TSSOP or 8-MSOP footprint
RoHS3 compliance and MSL Level 1

Substitute Categories:

Category A - Direct Functional Equivalents (Same Package Family): 74LVCV2G66DC,125 from Nexperia USA Inc. maintains identical electrical specifications with the same base product number (74LVCV2G66) but differs only in packaging format (8-VSSOP vs. 8-TSSOP). This part is active and provides direct functional replacement.

Category B - Lower On-State Resistance Alternatives (Enhanced Performance): ADG721BRMZ, ADG721BRMZ-REEL, and ADG721BRMZ-REEL7 from Analog Devices Inc. feature superior on-state resistance of 4Ohm (60% lower than the main part), expanded supply voltage range (1.8V ~ 5.5V), and active product status. These parts are suitable for applications requiring lower insertion loss and improved signal integrity.

Category C - Ultra-Low Leakage Alternatives (Precision Applications): ADG821BRMZ and ADG821BRMZ-REEL7 from Analog Devices Inc. provide 600mOhm on-state resistance with significantly lower leakage current (250pA vs. 10µA), making them suitable for precision analog switching where leakage minimization is critical. Operating temperature extends to 125°C, matching the main part specification.

Category D - Higher Voltage Range Alternatives (Extended Supply Compatibility): MAX323CUA+, MAX323CUA+T, MAX323EUA+, and MAX323EUA+T from Analog Devices Inc./Maxim Integrated support extended supply voltage range (2.7V ~ 16V), enabling use in higher-voltage systems. On-state resistance is 60Ohm, which exceeds the main part specification and is suitable only for applications with relaxed resistance requirements.

Parameter Comparison

Part Number	Manufacturer	Switch Circuit	Number of Circuits	On-State Resistance (Max)	Voltage - Supply (V+)	Switch Time Ton/Toff (Max)	-3dB Bandwidth	Charge Injection	Current - Leakage (Max)	Operating Temperature	Package	Product Status
74LVCV2G66DP,125	Nexperia USA Inc.	SPST - NO	2	10Ohm	2.3V ~ 5.5V	5ns, 9ns	210MHz	0.0035pC	10µA	-40°C ~ 125°C	8-TSSOP	Obsolete
74LVCV2G66DC,125	Nexperia USA Inc.	SPST - NO	2	10Ohm	2.3V ~ 5.5V	5ns, 9ns	210MHz	0.0035pC	10µA	-40°C ~ 125°C	8-VSSOP	Active
ADG721BRMZ	Analog Devices Inc.	SPST - NO	2	4Ohm	1.8V ~ 5.5V	14ns, 6ns	200MHz	2pC	250pA	-40°C ~ 85°C	8-MSOP	Active
ADG721BRMZ-REEL	Analog Devices Inc.	SPST - NO	2	4Ohm	1.8V ~ 5.5V	14ns, 6ns	200MHz	2pC	250pA	-40°C ~ 85°C	8-MSOP	Active
ADG721BRMZ-REEL7	Analog Devices Inc.	SPST - NO	2	4Ohm	1.8V ~ 5.5V	14ns, 6ns	200MHz	2pC	250pA	-40°C ~ 85°C	8-MSOP	Active
ADG821BRMZ	Analog Devices Inc.	SPST - NO	2	600mOhm	1.8V ~ 5.5V	45ns, 16ns	24MHz	15pC	250pA	-40°C ~ 125°C	8-MSOP	Active
ADG821BRMZ-REEL7	Analog Devices Inc.	SPST - NO	2	600mOhm	1.8V ~ 5.5V	45ns, 16ns	24MHz	15pC	250pA	-40°C ~ 125°C	8-MSOP	Active
MAX323CUA+	Analog Devices Inc./Maxim Integrated	SPST - NO	2	60Ohm	2.7V ~ 16V	150ns, 100ns	—	1pC	100pA	0°C ~ 70°C	8-uMAX/uSOP	Active
MAX323CUA+T	Analog Devices Inc./Maxim Integrated	SPST - NO	2	60Ohm	2.7V ~ 16V	150ns, 100ns	—	1pC	100pA	0°C ~ 70°C	8-uMAX/uSOP	Active
MAX323EUA+	Analog Devices Inc./Maxim Integrated	SPST - NO	2	60Ohm	2.7V ~ 16V	150ns, 100ns	—	1pC	100pA	-40°C ~ 85°C	8-uMAX/uSOP	Active
MAX323EUA+T	Analog Devices Inc./Maxim Integrated	SPST - NO	2	60Ohm	2.7V ~ 16V	150ns, 100ns	—	1pC	100pA	-40°C ~ 85°C	8-uMAX/uSOP	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: 74LVCV2G66DC,125 is the preferred substitute for the obsolete 74LVCV2G66DP,125. Both parts share identical electrical specifications, base product number (74LVCV2G66), and are manufactured by Nexperia USA Inc. The only difference is packaging format (8-VSSOP vs. 8-TSSOP). This part is active and maintains full RoHS3 compliance and MSL Level 1 rating. PCB layout modification is required due to package footprint change.

Secondary Recommendation - Enhanced Performance Alternative: ADG721BRMZ-REEL7 from Analog Devices Inc. provides superior on-state resistance (4Ohm vs. 10Ohm), lower leakage current (250pA vs. 10µA), and active product status. This part is suitable for applications requiring improved signal integrity and lower insertion loss. Operating temperature range is -40°C to 85°C, which covers most industrial applications but does not extend to 125°C. RoHS3 compliance and MSL Level 1 are maintained.

Tertiary Recommendation - Extended Temperature Alternative: ADG821BRMZ-REEL7 from Analog Devices Inc. maintains the full operating temperature range (-40°C to 125°C) matching the original part. This part features ultra-low leakage current (250pA) and is suitable for precision analog switching applications. On-state resistance of 600mOhm is significantly lower than the original 10Ohm specification, making this part suitable only for applications where insertion loss is not a limiting factor. RoHS3 compliance and MSL Level 1 are maintained.

Not Recommended for Direct Substitution: MAX323 series parts (MAX323CUA+, MAX323CUA+T, MAX323EUA+, MAX323EUA+T) feature on-state resistance of 60Ohm, which exceeds the original specification by 6x. These parts are suitable only for applications with relaxed resistance requirements and higher supply voltage operation (2.7V ~ 16V). Operating temperature range for MAX323CUA+ variants is limited to 0°C ~ 70°C, which does not meet the original -40°C specification.

Frequently Asked Questions (FAQ)

Q: Can I use 74LVCV2G66DC,125 as a direct drop-in replacement for 74LVCV2G66DP,125?

A: Electrically yes, but not mechanically. Both parts have identical electrical specifications and are from the same product family (74LVCV2G66). However, the package footprint differs: 74LVCV2G66DP,125 uses 8-TSSOP while 74LVCV2G66DC,125 uses 8-VSSOP. PCB layout modification is required. Both packages are 8-pin surface mount with 0.118" width, but pin spacing and pad geometry differ.

Q: What is the key difference between ADG721BRMZ and ADG821BRMZ?

A: The primary difference is on-state resistance: ADG721BRMZ features 4Ohm while ADG821BRMZ features 600mOhm. ADG821BRMZ also has significantly lower leakage current (250pA vs. 250pA for ADG721, but with much lower on-state resistance). ADG821BRMZ is optimized for precision applications where leakage minimization is critical, while ADG721BRMZ is optimized for low insertion loss. Both maintain the same operating temperature range (-40°C ~ 85°C) and are RoHS3 compliant.

Q: Why does the MAX323 series have higher on-state resistance?

A: The MAX323 series is designed for extended supply voltage operation (2.7V ~ 16V) compared to the original part (2.3V ~ 5.5V). The higher on-state resistance (60Ohm) is a trade-off for broader voltage compatibility and lower leakage current (100pA). This part is suitable only for applications where insertion loss is not critical and higher supply voltages are required.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and MSL Level 1 (Unlimited) rating, matching the original 74LVCV2G66DP,125 specifications.

Q: What is the impact of lower leakage current in ADG821BRMZ?

A: Lower leakage current (250pA vs. 10µA in the original part) reduces power consumption in off-state and improves signal integrity in precision analog switching applications. This is particularly beneficial for battery-powered or low-power systems and applications requiring high impedance measurement.

Q: Can I use ADG721BRMZ in a design originally specified for 74LVCV2G66DP,125?

A: Yes, with design review. ADG721BRMZ provides superior on-state resistance (4Ohm vs. 10Ohm), lower leakage, and active product status. However, the operating temperature range is limited to -40°C ~ 85°C (vs. -40°C ~ 125°C for the original). If your application requires operation above 85°C, this part is not suitable. Package footprint also differs (8-MSOP vs. 8-TSSOP), requiring PCB modification.

Q: What packaging options are available for ADG721 and ADG821 series?

A: ADG721 and ADG821 are available in multiple packaging formats: tube (standard), tape & reel (REEL), and cut tape with Digi-Reel (REEL7). All variants share identical electrical specifications. Selection depends on procurement volume and assembly process requirements. REEL7 variants typically offer the highest inventory availability.

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