CD4066BNSR Equivalent & Substitute Parts

Part Overview

The CD4066BNSR is a quad bilateral switch IC manufactured by Texas Instruments, designed for analog signal switching and multiplexing applications. This CMOS device operates across a wide supply voltage range of 3V to 18V and features four independent 1:1 switch circuits with low on-state resistance. The part is currently in active production status with substantial inventory availability. Alternative equivalent parts may be required due to supply constraints, end-of-life considerations for related variants, or specific application requirements regarding on-state resistance, bandwidth, or operating temperature ranges.

Substiute Parts

CD4066BNSR

Texas InstrumentsIn Stock: 5135CD4066BNSR Datasheet

Current PartRFQ

CD4016BNSR

Texas InstrumentsIn Stock: 3690CD4016BNSR Datasheet

Parametric EquivalentRFQ

HEF4066BT,653

Nexperia USA Inc.In Stock: 990152HEF4066BT,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD4066BNSR are qualified based on the following critical parameters that determine functional equivalence:

Primary Equivalence Criteria:

• Number of circuits: 4 independent switch circuits
• Circuit configuration: 1:1 multiplexer/demultiplexer topology
• Supply voltage range: Minimum 3V to 18V compatibility
• Package type: 14-SOIC surface mount
• Switch type: Bilateral FET switch (SPST configuration)
• Channel-to-channel matching: 5Ω maximum

Secondary Compatibility Parameters:

• Operating temperature range: -55°C to 125°C (or compatible subset)
• RoHS3 compliance and MSL rating
• On-state resistance: Functionally equivalent within application tolerance
• Bandwidth and capacitance characteristics

The CD4016BNSR qualifies as a parametric equivalent based on identical circuit count, topology, supply voltage range, package, and temperature specifications. The HEF4066BT,653 qualifies as a manufacturer-recommended equivalent with superior performance characteristics (lower on-state resistance, higher bandwidth) while maintaining core functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

CD4016BNSR (Parametric Equivalent): This part maintains identical electrical specifications and package dimensions to the CD4066BNSR, with matching supply voltage range and operating temperature specifications. Both devices are ROHS3 compliant with MSL 1 rating. Selection of this part is appropriate when supply of the primary part is constrained. Note that this part carries a Last Time Buy status, indicating limited future availability.

HEF4066BT,653 (Manufacturer-Recommended Equivalent): This Nexperia device is actively produced and offers enhanced performance characteristics including 35% lower on-state resistance (155Ω vs. 240Ω) and 2.25x higher bandwidth (90MHz vs. 40MHz). The supply voltage range is slightly reduced to 3V ~ 15V, which remains compatible with most standard applications. The package footprint differs slightly (3.90mm vs. 5.30mm width), requiring PCB layout verification. This part is recommended for new designs or applications requiring improved switching performance and long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can CD4016BNSR be used as a direct replacement for CD4066BNSR?

A: Yes. The CD4016BNSR maintains identical circuit count (4), topology (1:1), supply voltage range (3V ~ 18V), operating temperature range (-55°C ~ 125°C), and package dimensions (14-SOIC 0.209" width). No PCB modifications are required. However, verify that on-state resistance specifications are acceptable for your application, as this parameter is not specified for the CD4016BNSR.

Q: What are the key differences between CD4066BNSR and HEF4066BT,653?

A: The HEF4066BT,653 provides superior electrical performance with 35% lower on-state resistance and 2.25x higher bandwidth. The maximum supply voltage is reduced from 18V to 15V, and the package width is reduced from 5.30mm to 3.90mm. These differences require verification against your circuit requirements and PCB layout constraints.

Q: Is the HEF4066BT,653 pin-compatible with CD4066BNSR?

A: Both devices use 14-SOIC packages with identical pin assignments for the 1:1 switch topology. Pin compatibility is confirmed. However, the physical package width differs (3.90mm vs. 5.30mm), requiring PCB footprint verification before substitution.

Q: Which substitute part should be selected for new designs?

A: The HEF4066BT,653 is recommended for new designs due to active production status, enhanced performance characteristics, and long-term supply assurance. Verify that the reduced maximum supply voltage (15V vs. 18V) and package dimensions are compatible with your application requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. CD4066BNSR, CD4016BNSR, and HEF4066BT,653 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and reliability standards.

Q: What is the significance of CD4016BNSR carrying a Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments will discontinue production of this part after existing inventory is depleted. For applications currently using CD4016BNSR, transition planning to either CD4066BNSR or HEF4066BT,653 is recommended to ensure long-term supply continuity.