CD74HC4066PW Equivalent & Substitute Parts

Part Overview

The CD74HC4066PW is a 4-circuit SPST-NO (Single Pole Single Throw - Normally Open) analog switch IC manufactured by Texas Instruments in 14-TSSOP surface mount packaging. This component functions as a digitally controlled analog switch with 70Ohm on-state resistance, operating across a 2V to 10V single supply voltage range. The part is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring SPST-NO switching functionality in the 14-TSSOP form factor.

Key Parameters

Parameter	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)	500mOhm
Voltage - Supply, Single (V+)	2V ~ 10V
-3dB Bandwidth	200MHz
Channel Capacitance (CS(off), CD(off))	5pF
Current - Leakage (IS(off)) (Max)	100nA
Crosstalk	-72dB @ 1MHz
Operating Temperature	-55°C ~ 125°C (TA)
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the CD74HC4066PW are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Compatibility Parameters:

Switch circuit topology: SPST - NO configuration
Number of independent circuits: 4
Multiplexer/Demultiplexer ratio: 1:1
Package type: 14-TSSOP surface mount
Pin count and pinout compatibility
Supply voltage range overlap with 2V ~ 10V minimum requirement
Operating temperature range: minimum -55°C to maximum 125°C

Performance Parameters Allowing Substitution:

On-state resistance (Ron): Parts with equal or lower maximum Ron values are functionally compatible
Channel-to-channel matching (ΔRon): Tighter matching specifications are acceptable
Leakage current (IS(off)): Lower leakage is acceptable
Crosstalk performance: Better crosstalk isolation is acceptable
Bandwidth: Equal or higher bandwidth is acceptable

Substitutes are divided into two categories: direct equivalents from alternative manufacturers maintaining identical electrical specifications, and performance-enhanced alternatives offering improved characteristics while maintaining functional compatibility.

Parameter Comparison

Part Number	Manufacturer	Ron (Max)	ΔRon	V+ Range	Bandwidth	IS(off)	Crosstalk	Temp Range	Packaging	Status
CD74HC4066PW	Texas Instruments	70Ohm	500mOhm	2V ~ 10V	200MHz	100nA	-72dB @ 1MHz	-55°C ~ 125°C	Tube	Last Time Buy
CD74HC4066PWR	Texas Instruments	70Ohm	500mOhm	2V ~ 10V	200MHz	100nA	-72dB @ 1MHz	-55°C ~ 125°C	Tape & Reel	Active
MC74HC4066ADTR2G	onsemi	70Ohm	15Ohm	2V ~ 12V	160MHz	100nA	-80dB @ 1MHz	-55°C ~ 125°C	Tape & Reel	Active
74HC4066PW,118	Nexperia USA Inc.	95Ohm	3Ohm	2V ~ 10V	200MHz	1µA	-60dB @ 1MHz	-40°C ~ 125°C	Cut Tape & Digi-Reel	Active
74HC4066PW-Q100,11	Nexperia USA Inc.	95Ohm	3Ohm	2V ~ 10V	200MHz	1µA	-60dB @ 1MHz	-40°C ~ 125°C	Tape & Reel	Active
MAX4737EUD+	Analog Devices Inc./Maxim Integrated	4.5Ohm	100mOhm	1.8V ~ 5.5V	300MHz	500pA	-110dB @ 1MHz	-40°C ~ 85°C	Tube	Active
MAX4737EUD+T	Analog Devices Inc./Maxim Integrated	4.5Ohm	100mOhm	1.8V ~ 5.5V	300MHz	500pA	-110dB @ 1MHz	-40°C ~ 85°C	Tape & Reel	Active
MAX4747EUD+	Analog Devices Inc./Maxim Integrated	25Ohm	100mOhm	2V ~ 11V	250MHz	100pA	-84dB @ 1MHz	-40°C ~ 85°C	Tube	Active
MAX4747EUD+T	Analog Devices Inc./Maxim Integrated	25Ohm	100mOhm	2V ~ 11V	250MHz	100pA	-84dB @ 1MHz	-40°C ~ 85°C	Tape & Reel	Active
MC14066BDTR2G	onsemi	—	—	3V ~ 18V	—	—	—	-55°C ~ 125°C	Tape & Reel	Active

Engineering Selection Recommendations

Direct Equivalent - Recommended Primary Substitute: CD74HC4066PWR (Texas Instruments) is the direct equivalent to CD74HC4066PW, maintaining identical electrical specifications with the only difference being packaging format (Tape & Reel versus Tube). This part is in Active product status and represents the most straightforward substitution path. Both parts are ROHS3 compliant with MSL 1 rating.

Compatible Alternatives - Same Electrical Class: MC74HC4066ADTR2G (onsemi) provides equivalent on-state resistance and operating temperature range with enhanced channel-to-channel matching (15Ohm versus 500mOhm) and improved crosstalk performance (-80dB versus -72dB). Supply voltage range extends to 12V. This part is in Active status and ROHS3 compliant.

Compatible Alternatives - Extended Supply Voltage: 74HC4066PW,118 and 74HC4066PW-Q100,11 (Nexperia USA Inc.) both maintain 200MHz bandwidth and 2V ~ 10V supply compatibility. The Q100,11 variant includes AEC-Q100 automotive qualification. On-state resistance is specified at 95Ohm maximum, which is acceptable for applications where the additional 25Ohm margin does not impact circuit performance. Operating temperature minimum is -40°C, which excludes applications requiring -55°C operation.

Performance-Enhanced Alternatives: MAX4747EUD+ and MAX4747EUD+T (Analog Devices Inc./Maxim Integrated) offer significantly lower on-state resistance (25Ohm), superior crosstalk isolation (-84dB), and lower leakage current (100pA). Supply voltage range is 2V ~ 11V, compatible with the original specification. Operating temperature range is -40°C ~ 85°C, which excludes -55°C operation. These parts are suitable for applications where lower on-state resistance and improved signal isolation are beneficial.

MAX4737EUD+ and MAX4737EUD+T (Analog Devices Inc./Maxim Integrated) provide the lowest on-state resistance (4.5Ohm) and highest bandwidth (300MHz) with exceptional crosstalk performance (-110dB). Supply voltage range is 1.8V ~ 5.5V, which does not fully overlap the original 2V ~ 10V specification. Operating temperature range is -40°C ~ 85°C. These parts are suitable only for applications operating within the 2V ~ 5.5V window and not requiring -55°C operation.

Legacy Alternative: MC14066BDTR2G (onsemi) is a bilateral FET switch from the 4000B series supporting dual supply operation (3V ~ 18V). This part maintains 4 independent circuits in 14-TSSOP packaging and -55°C ~ 125°C operating temperature. Detailed electrical parameters differ from the CD74HC4066PW specification and require circuit-level evaluation for compatibility.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4066PWR be used as a direct replacement for CD74HC4066PW? A: Yes. CD74HC4066PWR is the direct equivalent part with identical electrical specifications. The only difference is packaging format: CD74HC4066PWR is supplied in Tape & Reel format while CD74HC4066PW is supplied in Tube format. Both parts are ROHS3 compliant with MSL 1 rating and maintain the same 14-TSSOP pinout.

Q: What is the key difference between the Texas Instruments and onsemi versions? A: MC74HC4066ADTR2G (onsemi) maintains the same 70Ohm on-state resistance as the Texas Instruments CD74HC4066PW but offers tighter channel-to-channel matching (15Ohm versus 500mOhm) and improved crosstalk performance (-80dB versus -72dB). Supply voltage range extends to 12V. Both parts support -55°C ~ 125°C operation.

Q: Why do the Nexperia parts (74HC4066PW,118 and 74HC4066PW-Q100,11) have higher on-state resistance? A: Nexperia's 74HC4066 variants specify 95Ohm maximum on-state resistance compared to 70Ohm for the Texas Instruments and onsemi versions. This 25Ohm difference is within acceptable tolerance for most switching applications. The 74HC4066PW-Q100,11 variant includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

Q: Can MAX4737 or MAX4747 parts replace the CD74HC4066PW? A: MAX4747EUD+/MAX4747EUD+T are functionally compatible with supply voltage range 2V ~ 11V and offer superior performance characteristics (25Ohm Ron, -84dB crosstalk). However, operating temperature range is limited to -40°C ~ 85°C, excluding applications requiring -55°C operation. MAX4737 variants operate at 1.8V ~ 5.5V, which does not fully cover the original 2V ~ 10V specification and are suitable only for lower voltage applications.

Q: What is the significance of the packaging designation (Tube, Tape & Reel, Cut Tape)? A: Packaging format affects component handling, storage, and automated assembly compatibility. Tube packaging is suitable for manual assembly or lower-volume production. Tape & Reel format is standard for high-volume automated assembly. Cut Tape & Digi-Reel is intermediate format. Electrical performance is identical across packaging formats for the same part number base.

Q: Is MC14066BDTR2G a suitable substitute? A: MC14066BDTR2G is a bilateral FET switch from the 4000B series with different electrical characteristics and dual supply operation capability (3V ~ 18V). While it maintains 4 independent circuits in 14-TSSOP packaging and -55°C ~ 125°C operating temperature, detailed parameter comparison is required at the circuit design level to confirm functional compatibility.

Q: Why is CD74HC4066PW marked as Last Time Buy? A: Last Time Buy status indicates Texas Instruments has discontinued production of this part number. CD74HC4066PWR (Tape & Reel format) is the active production equivalent. For new designs or long-term supply assurance, migration to CD74HC4066PWR or alternative manufacturers (onsemi, Nexperia, Analog Devices) is recommended.

Q: What operating temperature range should I consider for my application? A: The original CD74HC4066PW supports -55°C ~ 125°C operation. Nexperia and Maxim Integrated alternatives are limited to -40°C ~ 85°C. If your application requires -55°C operation, select from Texas Instruments CD74HC4066PWR, onsemi MC74HC4066ADTR2G, or onsemi MC14066BDTR2G.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the original CD74HC4066PW specification.

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