CD4066BCN Equivalent & Substitute Parts

Part Overview

The CD4066BCN is a quad bilateral switch IC manufactured by onsemi, designed for analog signal switching applications in the 4000B CMOS logic series. This component features four independent SPST (Single Pole Single Throw) switch circuits with 1:1 multiplexing capability and a maximum on-state resistance of 240Ω. The CD4066BCN is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional compatibility across switching performance, supply voltage range, and package configuration while accounting for differences in on-state resistance and bandwidth characteristics.

Substiute Parts

CD4066BCN

onsemiIn Stock: 1926CD4066BCN Datasheet

Current PartRFQ

CD4066BE

Texas InstrumentsIn Stock: 26507CD4066BE Datasheet

DirectRFQ

CD74HC4066E

Texas InstrumentsIn Stock: 2089CD74HC4066E Datasheet

SimilarRFQ

CD74HCT4066E

Harris CorporationIn Stock: 17602CD74HCT4066E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD4066BCN is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Switch circuit configuration: SPST with 1:1 multiplexing
• Number of circuits: 4 independent switch channels
• Package type: 14-DIP through-hole mounting
• Operating temperature range: -55°C ~ 125°C
• Supply voltage compatibility: Parts must operate within overlapping voltage ranges

Substitution Categories:

Direct Substitutes maintain identical on-state resistance (240Ω) and bandwidth (40MHz), ensuring drop-in replacement capability with no circuit redesign required.

Functional Equivalents provide the same switching topology and package but with different electrical characteristics. These parts require circuit evaluation due to variations in on-state resistance, bandwidth, and supply voltage specifications. Selection depends on application-specific requirements for signal integrity and frequency response.

Parameter Comparison

Engineering Selection Recommendations

CD4066BE (Texas Instruments) - Recommended Direct Substitute

The CD4066BE is the primary equivalent for CD4066BCN applications. This part maintains identical electrical specifications: 240Ω on-state resistance, 5Ω channel matching, 40MHz bandwidth, and 3V ~ 18V supply voltage range. The 14-DIP through-hole package ensures mechanical compatibility without PCB redesign. CD4066BE holds Active product status with ROHS3 compliance, providing long-term availability and regulatory alignment for new production. Inventory availability (26,435 units) supports immediate deployment.

CD74HC4066E (Texas Instruments) - Functional Equivalent for High-Speed Applications

The CD74HC4066E provides enhanced performance characteristics suitable for applications requiring reduced on-state resistance (70Ω vs. 240Ω) and increased bandwidth (200MHz vs. 40MHz). The narrower supply voltage range (2V ~ 10V) and lower channel capacitance (5pF vs. 8pF) make this part suitable for low-voltage, high-frequency signal switching. ROHS3 compliance and Last Time Buy status indicate active support. Circuit evaluation is required to confirm compatibility with existing supply voltage and signal frequency requirements.

CD74HCT4066E (Harris Corporation) - Restricted Substitution

The CD74HCT4066E shares the same 14-DIP package and switching topology as CD4066BCN but operates within a restricted supply voltage range (4.5V ~ 5.5V). This part is classified as Obsolete with RoHS non-compliance, limiting its suitability for new designs. Use only in legacy system maintenance where supply voltage constraints are met and regulatory compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can CD4066BE replace CD4066BCN in existing designs without circuit modification?

A: Yes. CD4066BE maintains identical on-state resistance (240Ω), channel matching (5Ω), bandwidth (40MHz), and supply voltage range (3V ~ 18V). The 14-DIP through-hole package is mechanically compatible. No circuit redesign is required for direct substitution.

Q: What are the key differences between CD4066BCN and CD74HC4066E?

A: The primary differences are on-state resistance (240Ω vs. 70Ω), bandwidth (40MHz vs. 200MHz), supply voltage range (3V ~ 18V vs. 2V ~ 10V), and channel capacitance (8pF vs. 5pF). CD74HC4066E is suitable for high-speed, low-voltage applications but requires circuit evaluation to confirm compatibility with existing supply and signal specifications.

Q: Is CD74HCT4066E suitable for new production designs?

A: No. CD74HCT4066E is classified as Obsolete with RoHS non-compliance. This part is restricted to legacy system maintenance only. For new designs, use CD4066BE or CD74HC4066E based on application requirements.

Q: What supply voltage range must be maintained for CD4066BE substitution?

A: CD4066BE operates within 3V ~ 18V, matching the CD4066BCN specification. Designs using supply voltages outside this range require evaluation of alternative parts such as CD74HC4066E (2V ~ 10V) or CD74HCT4066E (4.5V ~ 5.5V).

Q: Are all substitute parts available in 14-DIP through-hole packaging?

A: Yes. CD4066BE, CD74HC4066E, and CD74HCT4066E are all available in 14-DIP (0.300", 7.62mm) through-hole packages, ensuring mechanical compatibility with existing PCB layouts designed for CD4066BCN.

Q: Which substitute part offers the best long-term availability?

A: CD4066BE (Texas Instruments) is the recommended choice for long-term availability. It maintains Active product status with ROHS3 compliance and substantial inventory (26,435 units), ensuring supply continuity for production and maintenance applications.