MM74HC4066MX Equivalent & Substitute Parts

Part Overview

The MM74HC4066MX is a 4-circuit SPST-NO analog switch IC manufactured by onsemi, housed in a 14-SOIC package with 70Ohm on-state resistance. This part is classified as Obsolete, making substitute parts necessary for new designs and ongoing production requirements. The MM74HC4066MX operates across a 2V to 12V single supply range with 100MHz bandwidth and low crosstalk performance of -50dB @ 1MHz, suitable for analog signal switching and multiplexing applications in industrial and consumer electronics.

Key Parameters

Parameter	MM74HC4066MX
Manufacturer	onsemi
Switch Circuit Type	SPST - NO
Number of Circuits	4
On-State Resistance (Max)	70Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm
Voltage - Supply, Single (V+)	2V ~ 12V
-3dB Bandwidth	100MHz
Current - Leakage (IS(off)) (Max)	20nA
Crosstalk	-50dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MM74HC4066MX is determined by the following critical parameters:

Switch Circuit Configuration: SPST-NO topology with 4 independent circuits
On-State Resistance: Maximum 70Ohm specification
Supply Voltage Range: Compatibility with 2V to 12V single supply operation
Package Compatibility: 14-SOIC form factor for PCB layout continuity
Electrical Performance: Bandwidth, crosstalk, and leakage current characteristics

Substitute parts are grouped into two categories based on electrical performance alignment:

Category A - Direct Electrical Equivalents (70Ohm On-State Resistance): MC74HC4066ADG, MC74HC4066ADR2G, CD74HC4066M, CD74HC4066M96, CD74HC4066MT. These parts maintain the 70Ohm on-state resistance specification and are suitable for direct replacement in applications where the original electrical characteristics are required.

Category B - Functional Equivalents (Higher On-State Resistance): 74HC4066D,653, 74HC4066D-Q100,118, NLV74HC4066ADR2G, D24066QM96G4Q1, HEF4066BT,653. These parts provide SPST-NO 4-circuit switching functionality with different on-state resistance values (95Ohm to 155Ohm) and may require circuit evaluation for applications sensitive to switch resistance.

Parameter Comparison

Parameter	MM74HC4066MX	MC74HC4066ADG	MC74HC4066ADR2G	74HC4066D,653	74HC4066D-Q100,118	CD74HC4066M	CD74HC4066M96	CD74HC4066MT	NLV74HC4066ADR2G	D24066QM96G4Q1	HEF4066BT,653
Manufacturer	onsemi	onsemi	onsemi	Nexperia USA Inc.	Nexperia USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments	onsemi	Texas Instruments	Nexperia USA Inc.
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
On-State Resistance (Max)	70Ohm	70Ohm	70Ohm	95Ohm	95Ohm	70Ohm	70Ohm	70Ohm	70Ohm	95Ohm	155Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm	15Ohm	15Ohm	3Ohm	3Ohm	500mOhm	500mOhm	500mOhm	15Ohm	1Ohm	5Ohm
Voltage - Supply, Single (V+)	2V ~ 12V	2V ~ 12V	2V ~ 12V	2V ~ 10V	2V ~ 10V	2V ~ 10V	2V ~ 10V	2V ~ 10V	2V ~ 12V	4.5V ~ 5.5V	3V ~ 15V
-3dB Bandwidth	100MHz	160MHz	160MHz	200MHz	200MHz	200MHz	200MHz	200MHz	160MHz	200MHz	90MHz
Current - Leakage (IS(off)) (Max)	20nA	100nA	100nA	1µA	1µA	100nA	100nA	100nA	100nA	-	200nA
Crosstalk	-50dB @ 1MHz	-80dB @ 1MHz	-80dB @ 1MHz	-60dB @ 1MHz	-60dB @ 1MHz	-72dB @ 1MHz	-72dB @ 1MHz	-72dB @ 1MHz	-80dB @ 1MHz	-72dB @ 1MHz	-50dB @ 1MHz
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Last Time Buy	Active	Last Time Buy	Obsolete	Last Time Buy	Active
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC-Q100 Qualification	-	-	-	Yes	Yes	-	-	-	Yes	Yes	-

Engineering Selection Recommendations

For Direct Replacement (Electrical Equivalence)

MC74HC4066ADR2G and MC74HC4066ADG are the primary substitutes, both from onsemi with Active product status. These parts maintain the 70Ohm on-state resistance and 2V to 12V supply range. MC74HC4066ADR2G is available in Tape & Reel packaging with 25,290 units in stock, providing superior supply continuity. Both parts offer improved crosstalk performance (-80dB @ 1MHz versus -50dB @ 1MHz) and extended operating temperature range (-55°C to 125°C).

CD74HC4066M96 from Texas Instruments is an Active alternative with 70Ohm on-state resistance, 200MHz bandwidth, and excellent channel matching (500mOhm). This part is available in Cut Tape packaging with 2,078 units in stock.

For Applications Requiring Automotive Qualification

74HC4066D-Q100,118 from Nexperia is AEC-Q100 qualified with Active status, suitable for automotive applications. This part operates at 2V to 10V with 95Ohm on-state resistance and 200MHz bandwidth. NLV74HC4066ADR2G from onsemi provides automotive-grade performance with AEC-Q100 qualification, though marked as Obsolete.

For Extended Supply Voltage Range

HEF4066BT,653 from Nexperia supports 3V to 15V supply operation with 155Ohm on-state resistance and Active product status. This part is suitable for applications requiring wider supply voltage compatibility, with 990,100 units in stock.

For Restricted Supply Voltage Applications

D24066QM96G4Q1 from Texas Instruments is restricted to 4.5V to 5.5V operation with AEC-Q100 qualification and Last Time Buy status. This part is suitable only for fixed 5V supply designs.

Frequently Asked Questions (FAQ)

Q: Can MC74HC4066ADR2G directly replace MM74HC4066MX?

A: Yes, MC74HC4066ADR2G is a direct electrical equivalent. Both parts feature 70Ohm on-state resistance, 4-circuit SPST-NO configuration, and 14-SOIC packaging. MC74HC4066ADR2G has Active product status and improved performance specifications, making it the recommended primary substitute.

Q: What is the difference between 70Ohm and 95Ohm on-state resistance variants?

A: On-state resistance directly affects signal attenuation and power dissipation in switching applications. The 70Ohm variants (MM74HC4066MX, MC74HC4066ADR2G, CD74HC4066M96) provide lower insertion loss suitable for precision analog switching. The 95Ohm variants (74HC4066D,653, 74HC4066D-Q100,118, D24066QM96G4Q1) are acceptable where higher resistance is tolerable. Circuit evaluation is required if switching from 70Ohm to 95Ohm specifications.

Q: Are all substitute parts compatible with the 2V to 12V supply range?

A: No. Most onsemi and Texas Instruments parts operate at 2V to 10V. MC74HC4066ADR2G and NLV74HC4066ADR2G support the full 2V to 12V range. HEF4066BT,653 extends to 3V to 15V. D24066QM96G4Q1 is restricted to 4.5V to 5.5V. Verify supply voltage compatibility before selection.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel packaging. MC74HC4066ADR2G offers the largest inventory (25,290 units) in Tape & Reel format. CD74HC4066M96 is available in Cut Tape with 2,078 units. Packaging selection depends on production volume and assembly requirements.

Q: Which substitute part has the best crosstalk performance?

A: MC74HC4066ADG and MC74HC4066ADR2G both achieve -80dB @ 1MHz crosstalk, superior to the MM74HC4066MX specification of -50dB @ 1MHz. CD74HC4066M96 and CD74HC4066MT provide -72dB @ 1MHz. HEF4066BT,653 matches the original -50dB @ 1MHz specification.

Q: Are substitute parts RoHS compliant?

A: All Active and Last Time Buy substitute parts listed are ROHS3 compliant. The MM74HC4066MX does not specify RoHS status. All parts are REACH Unaffected and classified under ECCN EAR99.

Q: Which substitute parts are qualified for automotive applications?

A: 74HC4066D-Q100,118, NLV74HC4066ADR2G, an

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