CD4066BM Equivalent & Substitute Parts

Part Overview

The CD4066BM is a quad bilateral switch IC manufactured by Texas Instruments, designed for analog signal switching applications in the 4000B logic series. This device integrates four independent SPST (Single Pole Single Throw) switches with 1:1 multiplexer/demultiplexer configuration in a 14-SOIC surface mount package. The CD4066BM operates across a supply voltage range of 3V to 18V with a maximum on-state resistance of 240Ohm and supports bandwidth up to 40MHz.

The CD4066BM is currently in Last Time Buy status, indicating discontinued production. Equivalent and substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and legacy system support.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	CD4066BM
Series	4000B
Package / Case	14-SOIC (0.154", 3.90mm Width)
Switch Circuit Type	SPST
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	240Ohm
Channel-to-Channel Matching (ΔRon)	5Ohm
Voltage - Supply, Single (V+)	3V ~ 18V
-3dB Bandwidth	40MHz
Channel Capacitance (CS(off), CD(off))	8pF
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution of the CD4066BM is determined by the following critical parameters:

Package compatibility: 14-SOIC surface mount form factor
Circuit configuration: 4 independent SPST switches with 1:1 multiplexer/demultiplexer topology
Supply voltage range: Minimum 3V operation required for legacy 4000B series compatibility
On-state resistance: Maximum 240Ohm for the original specification
Operating temperature range: -55°C to 125°C
RoHS3 compliance and MSL Level 1 certification

Substitute parts are grouped into three categories:

Direct manufacturer equivalents (same part number, different packaging)
Parametric equivalents (same base functionality, different electrical characteristics)
Functional substitutes (alternative switch architectures meeting core switching requirements)

Parameter Comparison

Part Number	Manufacturer	Package	Switch Type	Circuits	Ron (Max)	V+ Range	Bandwidth	Temp Range	Status
CD4066BM	Texas Instruments	14-SOIC	SPST	4	240Ohm	3V ~ 18V	40MHz	-55°C ~ 125°C	Last Time Buy
CD4066BM96	Texas Instruments	14-SOIC	SPST	4	240Ohm	3V ~ 18V	40MHz	-55°C ~ 125°C	Active
CD4016BM	Texas Instruments	14-SOIC	Bilateral FET	4	-	3V ~ 18V	-	-55°C ~ 125°C	Last Time Buy
MC14066BDR2G	onsemi	14-SOIC	Bilateral FET	4	-	3V ~ 18V	-	-55°C ~ 125°C	Active
HEF4066BT,653	Nexperia USA Inc.	14-SO	SPST - NO	4	155Ohm	3V ~ 15V	90MHz	-40°C ~ 125°C	Active
MC74HC4066ADR2G	onsemi	14-SOIC	SPST - NO	4	70Ohm	2V ~ 12V	160MHz	-55°C ~ 125°C	Active
MC74LVX4066DR2G	onsemi	14-SOIC	SPST - NO	4	20Ohm	2V ~ 6V	160MHz	-55°C ~ 85°C	Active
MC74VHC4066DR2G	onsemi	14-SOIC	SPST - NO	4	70Ohm	2V ~ 12V	160MHz	-55°C ~ 125°C	Active

Engineering Selection Recommendations

Selection of substitute parts for CD4066BM applications must account for product status and compliance certifications:

CD4066BM96 is the primary direct equivalent, manufactured by Texas Instruments with identical electrical specifications and operating parameters. This part maintains Active product status and is available in higher quantities, making it the preferred choice for new designs requiring 4000B series compatibility.

MC14066BDR2G and MC14066BDG represent parametric equivalents from onsemi, maintaining the 4000B series designation and dual supply voltage range of 3V to 18V. Both parts are Active status with RoHS3 compliance and MSL Level 1 certification, suitable for applications requiring legacy 4000B architecture.

HEF4066BT,653 from Nexperia USA Inc. is an Active SPST switch with improved on-state resistance of 155Ohm and extended bandwidth to 90MHz. This part operates within 3V to 15V supply range and maintains RoHS3 compliance. The operating temperature range is -40°C to 125°C, which may limit use in extended low-temperature applications below -40°C.

MC74HC4066ADR2G and MC74VHC4066DR2G are high-speed CMOS alternatives with significantly lower on-state resistance (70Ohm) and extended bandwidth (160MHz). Both maintain -55°C to 125°C operating range and RoHS3 compliance. Supply voltage range is reduced to 2V to 12V, requiring verification for applications exceeding 12V operation.

MC74LVX4066DR2G offers the lowest on-state resistance (20Ohm) and operates at 2V to 6V supply voltage with -55°C to 85°C temperature range. This part is suitable only for low-voltage applications and does not support extended high-temperature operation above 85°C.

All substitute parts maintain 14-SOIC package compatibility and four independent SPST switch circuits. RoHS3 compliance and MSL Level 1 certification are consistent across all recommended alternatives.

Frequently Asked Questions (FAQ)

Q: Can CD4066BM96 be used as a direct replacement for CD4066BM?

A: Yes. CD4066BM96 is manufactured by Texas Instruments with identical electrical specifications, operating parameters, and 14-SOIC package. The primary difference is packaging format (Cut Tape & Digi-Reel versus Tube) and Active product status. Electrical performance and pin compatibility are equivalent.

Q: What is the key difference between 4000B series parts and HC/LVX variants?

A: 4000B series parts (CD4066BM, CD4016BM, MC14066BDR2G) operate across 3V to 18V supply voltage and use CMOS/FET switch architecture. HC and LVX variants use high-speed CMOS logic families with reduced supply voltage ranges (2V to 12V for HC, 2V to 6V for LVX) and significantly lower on-state resistance. 4000B parts are suitable for analog switching across wide voltage ranges; HC/LVX parts are optimized for digital logic switching at lower voltages.

Q: Is the HEF4066BT,653 compatible with applications requiring -55°C operation?

A: No. HEF4066BT,653 operates from -40°C to 125°C. Applications requiring -55°C minimum operating temperature must use CD4066BM, CD4066BM96, MC14066BDR2G, MC74HC4066ADR2G, or MC74VHC4066DR2G.

Q: Can MC74LVX4066DR2G replace CD4066BM in all applications?

A: No. MC74LVX4066DR2G is restricted to 2V to 6V supply voltage operation and -55°C to 85°C temperature range. Applications requiring supply voltages above 6V or operating temperatures above 85°C cannot use this part. Verify supply voltage and temperature requirements before substitution.

Q: What packaging options are available for CD4066BM equivalents?

A: CD4066BM96 is available in Cut Tape (CT) & Digi-Reel packaging. MC14066BDR2G is supplied in Tape & Reel (TR) format. HEF4066BT,653 is available in Cut Tape (CT) & Digi-Reel. MC74HC4066ADR2G is supplied in Tape & Reel (TR). MC74LVX4066DR2G is available in Cut Tape (CT). All parts maintain 14-SOIC surface mount form factor compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts maintain RoHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, consistent with CD4066BM certification.

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