74VHC4066N Equivalent & Substitute Parts

Part Overview

The 74VHC4066N is a 4-circuit SPST-NO analog switch IC manufactured by onsemi, housed in a 14-MDIP package. This component functions as a general-purpose analog switch with 70Ohm on-state resistance and operates across a 2V to 12V supply range. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	74VHC4066N
Manufacturer	onsemi
Switch Circuit Type	SPST - NO
Number of Circuits	4
On-State Resistance (Max)	70Ohm
Voltage - Supply, Single (V+)	2V ~ 12V
Switch Time (Ton, Toff) (Max)	10ns, 30ns
-3dB Bandwidth	100MHz
Current - Leakage (IS(off)) (Max)	100nA
Operating Temperature	-40°C ~ 85°C
Package / Case	14-DIP (0.300", 7.62mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the 74VHC4066N is determined by the following critical parameters:

Switch circuit configuration: SPST - NO (Single Pole Single Throw - Normally Open)
Number of independent circuits: 4
Package type: 14-DIP form factor (0.300", 7.62mm)
Supply voltage compatibility: Minimum 2V operation required
On-state resistance: Maximum 70Ohm (lower values acceptable for improved performance)
Operating temperature range: -40°C to 85°C minimum

All substitute parts listed maintain these core functional and mechanical specifications, ensuring pin-compatible replacement capability.

Parameter Comparison

Parameter	74VHC4066N	MAX4066CPD+	SN74AHC4066N	SN74LV4066AN	TC4066BP-NF
Manufacturer	onsemi	Analog Devices Inc./Maxim Integrated	Texas Instruments	Texas Instruments	Toshiba Semiconductor and Storage
Switch Circuit Type	SPST - NO	SPST - NO	SPST - NO	SPST - NO	Bilateral, FET Switches
Number of Circuits	4	4	4	4	4
On-State Resistance (Max)	70Ohm	45Ohm	75Ohm	75Ohm	Not specified
Voltage - Supply, Single (V+)	2V ~ 12V	2V ~ 16V	2V ~ 5.5V	2V ~ 5.5V	3V ~ 18V (Dual Supply)
Switch Time (Ton, Toff) (Max)	10ns, 30ns	100ns, 75ns	12ns, 12ns	12ns, 12ns	Not specified
-3dB Bandwidth	100MHz	100MHz	50MHz	50MHz	Not specified
Current - Leakage (IS(off)) (Max)	100nA	1nA	100nA	100nA	Not specified
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Product Status	Obsolete	Active	Last Time Buy	Last Time Buy	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MAX4066CPD+ (Analog Devices Inc./Maxim Integrated): Active product status with ROHS3 compliance. Offers superior on-state resistance (45Ohm) and extended supply voltage range (2V ~ 16V). Operating temperature range limited to 0°C ~ 70°C, which is narrower than the original specification. Suitable for applications not requiring full -40°C operation.

SN74AHC4066N (Texas Instruments): Last Time Buy status with ROHS3 compliance. Maintains identical operating temperature range (-40°C ~ 85°C) and leakage current specifications (100nA). On-state resistance (75Ohm) is marginally higher than the original. Supply voltage range restricted to 2V ~ 5.5V. Recommended for designs requiring full temperature range operation.

SN74LV4066AN (Texas Instruments): Last Time Buy status with ROHS3 compliance. Functionally equivalent to SN74AHC4066N with identical electrical specifications and operating temperature range. Supply voltage range limited to 2V ~ 5.5V. Suitable as alternative to SN74AHC4066N where availability differs.

TC4066BP-NF (Toshiba Semiconductor and Storage): Active product status with ROHS3 compliance. Operates as bilateral FET switch with dual supply capability (3V ~ 18V). Maintains -40°C ~ 85°C operating temperature range. Detailed on-state resistance and switching time specifications not provided. Suitable for applications requiring extended supply voltage flexibility.

Frequently Asked Questions (FAQ)

Q: Can the 74VHC4066N be directly replaced with MAX4066CPD+?

A: Yes, for applications operating within 0°C to 70°C. The MAX4066CPD+ is pin-compatible in the 14-DIP package and maintains the same 4-circuit SPST-NO configuration. However, the narrower operating temperature range excludes use in systems requiring -40°C operation.

Q: What is the primary difference between SN74AHC4066N and SN74LV4066AN?

A: Both parts are functionally equivalent with identical electrical specifications, operating temperature range, and package type. Selection between them should be based on current availability and supplier preference, as both are Last Time Buy products.

Q: Is TC4066BP-NF suitable as a direct replacement?

A: TC4066BP-NF is mechanically and functionally compatible in the 14-DIP package. However, it operates as a bilateral FET switch rather than a unidirectional SPST-NO switch. This distinction may affect circuit behavior in applications requiring directional switching control. Verify circuit requirements before substitution.

Q: Which substitute offers the best performance improvement over the original 74VHC4066N?

A: MAX4066CPD+ provides the lowest on-state resistance (45Ohm versus 70Ohm) and superior leakage current performance (1nA versus 100nA). These improvements reduce signal distortion and power consumption. The extended supply voltage range (2V ~ 16V) also provides greater design flexibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. MAX4066CPD+, SN74AHC4066N, SN74LV4066AN, and TC4066BP-NF all carry ROHS3 compliance certification. The original 74VHC4066N RoHS status was not specified.

Q: What supply voltage range is common to all substitutes and the original part?

A: The minimum common supply voltage range is 2V ~ 5.5V, which is supported by all substitute parts. The original 74VHC4066N supports 2V ~ 12V. Applications requiring operation above 5.5V should use MAX4066CPD+ (2V ~ 16V) or TC4066BP-NF (3V ~ 18V).

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