SN74AHC4066N Equivalent & Substitute Parts

Part Overview

The SN74AHC4066N is a 4-circuit SPST-NO analog switch IC manufactured by Texas Instruments, housed in a 14-DIP package. This component functions as a precision electronic switch with 75Ohm on-state resistance, operating across a 2V to 5.5V single supply voltage range. The device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. Alternative equivalent and substitute parts are necessary to ensure design continuity and long-term component sourcing for new production runs or design revisions.

Substiute Parts

SN74AHC4066N

Texas InstrumentsIn Stock: 3537SN74AHC4066N Datasheet

Current PartRFQ

SN74AHC4066PWR

Texas InstrumentsIn Stock: 5704SN74AHC4066PWR Datasheet

MFR RecommendedRFQ

MAX4066CPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1161MAX4066CPD+ Datasheet

MFR RecommendedRFQ

MAX4614CPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 2033MAX4614CPD+ Datasheet

MFR RecommendedRFQ

MAX4614EPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1217MAX4614EPD+ Datasheet

MFR RecommendedRFQ

TC4066BP-NF

Toshiba Semiconductor and StorageIn Stock: 1527TC4066BP-NF Datasheet

MFR RecommendedRFQ

SN74LV4066AN

Texas InstrumentsIn Stock: 2264SN74LV4066AN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AHC4066N is determined by the following critical parameters:

Primary Substitution Criteria:

• Switch circuit type: SPST - NO configuration
• Number of circuits: 4 independent switch circuits
• On-state resistance: Maximum 75Ohm (lower values are acceptable for direct substitution)
• Supply voltage range: Minimum 2V to 5.5V compatibility
• Operating temperature range: Minimum -40°C to 85°C coverage
• Package type: 14-DIP through-hole mounting

Substitution Categories:

Direct Package Equivalents (14-DIP Through Hole): Parts maintaining identical 14-DIP packaging with matching or superior electrical performance within the specified voltage and temperature ranges.

Performance-Enhanced Equivalents: Parts with lower on-state resistance (10Ohm to 45Ohm) and improved electrical characteristics while maintaining 14-DIP packaging and compatible supply voltage ranges.

Package Variant (Surface Mount): The SN74AHC4066PWR provides identical electrical specifications in 14-TSSOP surface-mount packaging for designs transitioning to SMT assembly.

Alternative Technology: The TC4066BP-NF represents a bilateral FET switch alternative with dual supply capability (3V to 18V) and 4 independent circuits in 14-DIP packaging.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

SN74LV4066AN provides parametric equivalence to the SN74AHC4066N with identical on-state resistance (75Ohm), switch timing (12ns), bandwidth (50MHz), and operating temperature range (-40°C to 85°C). Both devices are Last Time Buy status with 14-DIP through-hole packaging. This part is suitable for designs requiring no electrical modifications.

For Surface Mount Assembly Transition:

SN74AHC4066PWR maintains all electrical specifications of the SN74AHC4066N while providing 14-TSSOP surface-mount packaging. This substitution is appropriate for PCB redesigns transitioning from through-hole to SMT assembly processes. Electrical performance remains identical; only the package footprint changes.

For Improved Performance (Lower On-State Resistance):

MAX4614CPD+ and MAX4614EPD+ offer superior on-state resistance (10Ohm versus 75Ohm) with improved channel matching (200mOhm versus 2Ohm) and lower leakage current (1nA versus 100nA). Both maintain 2V to 5.5V supply compatibility and 14-DIP packaging. MAX4614EPD+ extends the operating temperature range to -40°C to 85°C, matching the original part. These substitutions are suitable for applications requiring lower insertion loss or improved signal integrity.

MAX4066CPD+ provides intermediate performance with 45Ohm on-state resistance and extended supply voltage range (2V to 16V). Operating temperature is limited to 0°C to 70°C. This part is suitable for designs with higher supply voltage requirements but narrower temperature specifications.

For Dual Supply Applications:

TC4066BP-NF is a bilateral FET switch alternative with 4 independent circuits in 14-DIP packaging. This device operates on dual supply (3V to 18V) rather than single supply, making it suitable for designs requiring symmetric positive and negative supply rails. Product status is Active, ensuring long-term availability.

Compliance and Availability Considerations:

All substitute parts maintain ROHS3 compliance and EAR99 export classification. MAX4614CPD+, MAX4614EPD+, and TC4066BP-NF carry Active product status, providing superior long-term availability compared to the Last Time Buy status of the original SN74AHC4066N. For new designs or production continuity, Active-status alternatives are recommended.

Frequently Asked Questions (FAQ)

Q: Can MAX4614CPD+ directly replace SN74AHC4066N without circuit modifications?

A: Yes, within the specified electrical parameters. MAX4614CPD+ maintains SPST-NO 4-circuit configuration, 2V to 5.5V supply compatibility, and 14-DIP packaging. The lower on-state resistance (10Ohm versus 75Ohm) is a performance improvement that does not require circuit changes. However, operating temperature is limited to 0°C to 70°C; applications requiring -40°C operation must use MAX4614EPD+ instead.

Q: What is the difference between SN74AHC4066PWR and SN74AHC4066N?

A: Both parts are electrically identical with matching on-state resistance (75Ohm), switch timing (12ns), and operating temperature range (-40°C to 85°C). The difference is packaging: SN74AHC4066N uses 14-DIP through-hole mounting, while SN74AHC4066PWR uses 14-TSSOP surface-mount. Selection depends on PCB assembly process requirements.

Q: Is TC4066BP-NF compatible with single-supply designs?

A: No. TC4066BP-NF requires dual supply operation (3V to 18V). It is not suitable for single-supply designs using 2V to 5.5V. Use TC4066BP-NF only in applications with symmetric positive and negative supply rails.

Q: Why does MAX4066CPD+ have a higher operating temperature limit (0°C to 70°C) compared to the original part?

A: Operating temperature range is a specified parameter determined by device characterization and qualification. MAX4066CPD+ is qualified to 0°C to 70°C. For applications requiring -40°C operation, use MAX4614EPD+ or SN74LV4066AN instead.

Q: Can I use MAX4614CPD+ in a -40°C to 85°C environment?

A: No. MAX4614CPD+ is specified for 0°C to 70°C operation only. For extended temperature range (-40°C to 85°C), use MAX4614EPD+, which provides identical electrical performance with extended temperature qualification.

Q: What does "Last Time Buy" status mean for the SN74AHC4066N?

A: Last Time Buy indicates the manufacturer has discontinued production. Existing inventory is available, but no future manufacturing runs are planned. For new designs or long-term production, select substitute parts with Active status such as MAX4614EPD+, MAX4066CPD+, or TC4066BP-NF.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed—SN74AHC4066PWR, MAX4066CPD+, MAX4614CPD+, MAX4614EPD+, SN74LV4066AN, and TC4066BP-NF—are ROHS3 compliant and suitable for applications with RoHS requirements.