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MM74HC4066M Equivalent & Substitute Parts
Part Overview
The MM74HC4066M is a 4-circuit SPST-NO analog switch IC manufactured by onsemi, housed in a 14-SOIC package. This component functions as a single-pole single-throw normally-open switch array with 70Ohm on-state resistance, designed for signal routing and multiplexing applications across supply voltages from 2V to 12V. The part is currently listed as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning.
Substiute Parts
Key Parameters
| Parameter | MM74HC4066M Value |
|---|---|
| Switch Circuit Type | SPST - NO |
| Number of Circuits | 4 |
| Multiplexer/Demultiplexer Circuit | 1:1 |
| On-State Resistance (Max) | 70Ohm |
| Channel-to-Channel Matching (ΔRon) | 5Ohm |
| Voltage - Supply, Single (V+) | 2V ~ 12V |
| Switch Time (Ton, Toff) (Max) | 10ns, 30ns |
| -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) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility for the MM74HC4066M is determined by the following critical parameters:
Primary Compatibility Criteria:
- Switch circuit topology: SPST - NO (single-pole single-throw normally-open)
- Circuit count: 4 independent switch circuits
- Multiplexer configuration: 1:1
- Package type: 14-SOIC form factor with identical 0.154" (3.90mm) width
- Surface mount technology
Electrical Performance Criteria:
- On-state resistance maximum: 70Ohm (allows parts rated up to 70Ohm; higher resistance introduces signal attenuation)
- Supply voltage range: Minimum 2V to 12V compatibility (parts with narrower ranges may not support full application voltage envelope)
- Operating temperature: -40°C to 85°C minimum coverage
- Leakage current and crosstalk specifications must not degrade signal integrity in the target application
Parts are grouped into three categories based on these parameters: direct electrical equivalents (onsemi MC74HC4066 series), compatible alternatives with enhanced specifications (Nexperia 74HC4066D series), and functionally similar parts with different electrical characteristics (Texas Instruments CD74HC4066 series and HEF4066BT).
Parameter Comparison
| Part Number | Manufacturer | On-State Resistance (Max) | ΔRon | Supply Voltage | Operating Temp | Bandwidth | Leakage (Max) | Crosstalk | Product Status | Package |
|---|---|---|---|---|---|---|---|---|---|---|
| MM74HC4066M | onsemi | 70Ohm | 5Ohm | 2V ~ 12V | -40°C ~ 85°C | 100MHz | 20nA | -50dB @ 1MHz | Obsolete | 14-SOIC |
| MC74HC4066ADG | onsemi | 70Ohm | 15Ohm | 2V ~ 12V | -55°C ~ 125°C | 160MHz | 100nA | -80dB @ 1MHz | Active | 14-SOIC |
| MC74HC4066ADR2G | onsemi | 70Ohm | 15Ohm | 2V ~ 12V | -55°C ~ 125°C | 160MHz | 100nA | -80dB @ 1MHz | Active | 14-SOIC |
| NLV74HC4066ADR2G | onsemi | 70Ohm | 15Ohm | 2V ~ 12V | -55°C ~ 125°C | 160MHz | 100nA | -80dB @ 1MHz | Obsolete | 14-SOIC |
| 74HC4066D,653 | Nexperia USA Inc. | 95Ohm | 3Ohm | 2V ~ 10V | -40°C ~ 125°C | 200MHz | 1µA | -60dB @ 1MHz | Active | 14-SOIC |
| 74HC4066D-Q100,118 | Nexperia USA Inc. | 95Ohm | 3Ohm | 2V ~ 10V | -40°C ~ 125°C | 200MHz | 1µA | -60dB @ 1MHz | Active | 14-SOIC |
| CD74HC4066M | Texas Instruments | 70Ohm | 500mOhm | 2V ~ 10V | -55°C ~ 125°C | 200MHz | 100nA | -72dB @ 1MHz | Last Time Buy | 14-SOIC |
| CD74HC4066M96 | Texas Instruments | 70Ohm | 500mOhm | 2V ~ 10V | -55°C ~ 125°C | 200MHz | 100nA | -72dB @ 1MHz | Active | 14-SOIC |
| CD74HC4066MT | Texas Instruments | 70Ohm | 500mOhm | 2V ~ 10V | -55°C ~ 125°C | 200MHz | 100nA | -72dB @ 1MHz | Last Time Buy | 14-SOIC |
| D24066QM96G4Q1 | Texas Instruments | 95Ohm | 1Ohm | 4.5V ~ 5.5V | -40°C ~ 125°C | 200MHz | — | -72dB @ 1MHz | Last Time Buy | 14-SOIC |
| HEF4066BT,653 | Nexperia USA Inc. | 155Ohm | 5Ohm | 3V ~ 15V | -40°C ~ 125°C | 90MHz | 200nA | -50dB @ 1MHz | Active | 14-SOIC |
Engineering Selection Recommendations
Tier 1 - Direct Electrical Equivalents (Recommended Primary Substitutes):
MC74HC4066ADR2G and MC74HC4066ADG maintain the 70Ohm on-state resistance specification of the MM74HC4066M while offering active product status. Both parts support the full 2V to 12V supply range and are available in 14-SOIC packaging. MC74HC4066ADR2G is supplied in Tape & Reel format with 25,290 units in stock, providing superior availability. These onsemi parts are direct functional replacements with enhanced performance characteristics including improved crosstalk (-80dB vs -50dB) and extended operating temperature range (-55°C to 125°C).
Tier 2 - Compatible Alternatives with Modified Electrical Characteristics:
CD74HC4066M96 (Texas Instruments, Active status) and CD74HC4066MT (Last Time Buy status) maintain 70Ohm on-state resistance but restrict supply voltage to 2V to 10V, narrowing the application envelope compared to the original part. These parts offer superior channel-to-channel matching (500mOhm vs 5Ohm) and improved crosstalk performance (-72dB). CD74HC4066M96 is actively produced with 2,078 units available.
74HC4066D,653 and 74HC4066D-Q100,118 (Nexperia, Active status) feature 95Ohm on-state resistance and 2V to 10V supply range. The higher resistance introduces 35% greater signal attenuation compared to the original specification. These parts are suitable only for applications where the increased on-state resistance does not compromise signal integrity. 74HC4066D-Q100,118 carries AEC-Q100 automotive qualification.
Tier 3 - Functionally Similar Parts with Significant Parameter Deviations:
D24066QM96G4Q1 (Texas Instruments, Last Time Buy) restricts supply voltage to 4.5V to 5.5V, making it unsuitable for applications requiring the full 2V to 12V range of the original part. This part is appropriate only for fixed 5V supply designs.
HEF4066BT,653 (Nexperia, Active status) features 155Ohm on-state resistance and 3V to 15V supply range. The significantly higher resistance (121% increase over original specification) and reduced bandwidth (90MHz vs 100MHz) make this part suitable only for low-frequency or high-impedance applications where signal attenuation is acceptable.
Compliance and Certification:
All substitute parts listed are RoHS3 compliant and REACH unaffected. NLV74HC4066ADR2G and 74HC4066D-Q100,118 carry AEC-Q100 automotive qualification for applications requiring automotive-grade components.
Frequently Asked Questions (FAQ)
Q: Can MC74HC4066ADR2G directly replace MM74HC4066M in all applications?
A: MC74HC4066ADR2G is electrically compatible as a direct substitute. Both parts maintain 70Ohm on-state resistance, support 2V to 12V supply voltage, and use identical 14-SOIC packaging. MC74HC4066ADR2G offers enhanced performance with improved crosstalk and extended temperature range. The primary difference is product status: MM74HC4066M is obsolete while MC74HC4066ADR2G is actively produced.
Q: What is the impact of using 74HC4066D,653 with its 95Ohm on-state resistance instead of the original 70Ohm specification?
A: The 95Ohm resistance introduces 35% greater signal attenuation through the switch. In analog signal routing applications, this increases insertion loss and may degrade signal-to-noise ratio. In digital switching applications with high-impedance loads, the impact is typically negligible. Circuit simulation or bench testing is necessary to determine acceptability for specific applications.
Q: Why does HEF4066BT,653 have 155Ohm on-state resistance compared to 70Ohm in the original part?
A: HEF4066BT,653 is a CMOS analog switch from the HEF4066 family, which uses different semiconductor process technology than the HC4066 series. The higher on-state resistance is inherent to this device family. HEF4066BT,653 is suitable for applications where signal attenuation is acceptable, such as low-frequency audio switching or high-impedance sensor interfaces.
Q: Are there packaging differences between substitute parts?
A: All listed substitute parts use 14-SOIC (0.154", 3.90mm width) surface mount packaging, maintaining PCB layout compatibility with MM74HC4066M. Packaging format variations (Tube, Tape & Reel, Cut Tape) affect supply and handling but not electrical or mechanical compatibility.
Q: Which substitute part offers the best performance improvement over MM74HC4066M?
A: MC74HC4066ADR2G provides the most comprehensive performance enhancement: identical 70Ohm on-state resistance, improved crosstalk (-80dB vs -50dB), extended operating temperature range (-55°C to 125°C vs -40°C to 85°C), and active product status with high inventory availability (25,290 units).
Q: Can D24066QM96G4Q1 be used in applications requiring 12V supply operation?
A: No. D24066QM96G4Q1 is specified for 4.5V to 5.5V supply voltage only. Using this part outside its specified voltage range violates absolute maximum ratings and will result in device failure or unpredictable operation.
Q: What is the significance of AEC-Q100 qualification on 74HC4066D-Q100,118 and NLV74HC4066ADR2G?
A: AEC-Q100 qualification indicates the part meets automotive industry reliability and quality standards established by the Automotive Electronics Council. These parts are suitable for automotive applications requiring documented traceability and reliability testing. Non-qualified parts may not be acceptable for automotive designs subject to OEM specifications.
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