CD74HC4066E Equivalent & Substitute Parts

Part Overview

The CD74HC4066E is a 4-circuit SPST-NO analog switch IC manufactured by Texas Instruments, housed in a 14-DIP through-hole package. This device functions as a general-purpose analog switch array with 70Ohm on-state resistance and operates across a 2V to 10V single supply range. The CD74HC4066E is designated as Last Time Buy, indicating end-of-life 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.

Key Parameters

Parameter	CD74HC4066E
Manufacturer	Texas Instruments
Switch Circuit Type	SPST - NO
Number of Circuits	4
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-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC4066E is determined by the following critical parameters:

Switch Circuit Configuration: Must be SPST - NO (Single Pole Single Throw - Normally Open)
Circuit Count: Must provide 4 independent switch circuits
On-State Resistance: Maximum 70Ohm or lower to maintain signal integrity
Supply Voltage Range: Must support the 2V ~ 10V operating window
Channel Capacitance: Must not exceed 5pF to preserve bandwidth characteristics
Leakage Current: Must not exceed 100nA at maximum specification
Operating Temperature Range: Must encompass -55°C ~ 125°C or be compatible with the application's thermal requirements
Package Compatibility: Through-hole 14-DIP packages are preferred for direct replacement; surface-mount alternatives require PCB redesign

The substitute parts listed below meet these core electrical and mechanical criteria while offering variations in packaging, product status, and performance enhancements.

Parameter Comparison

Parameter	CD74HC4066E	CD74HC4066PWR	CD74HC4066M	MAX4066CPD+	TC74HC4066APF
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc./Maxim Integrated	Toshiba Semiconductor and Storage
Switch Circuit Type	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	4	4	4	4	4
On-State Resistance (Max)	70Ohm	70Ohm	70Ohm	45Ohm	80Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	500mOhm	500mOhm	500mOhm	5Ohm
Voltage - Supply, Single (V+)	2V ~ 10V	2V ~ 10V	2V ~ 10V	2V ~ 16V	2V ~ 12V
-3dB Bandwidth	200MHz	200MHz	200MHz	100MHz	200MHz
Channel Capacitance (CS(off), CD(off))	5pF	5pF	5pF	9pF, 9pF	10pF
Current - Leakage (IS(off)) (Max)	100nA	100nA	100nA	1nA	1µA
Crosstalk	-72dB @ 1MHz	-72dB @ 1MHz	-72dB @ 1MHz	-86dB @ 1MHz	-60dB @ 1MHz
Operating Temperature	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	14-DIP (0.300", 7.62mm)	14-TSSOP (0.173", 4.40mm Width)	14-SOIC (0.154", 3.90mm Width)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Surface Mount	Surface Mount	Through Hole	Through Hole
Product Status	Last Time Buy	Active	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Through-Hole Replacement (No PCB Redesign Required)

TC74HC4066APF and MAX4066CPD+ are both available in 14-DIP through-hole packages and provide direct pin-compatible substitution for the CD74HC4066E. TC74HC4066APF maintains Active product status and operates across 2V ~ 12V, encompassing the CD74HC4066E supply range. MAX4066CPD+ offers superior leakage current performance (1nA vs. 100nA) and extended supply voltage support (2V ~ 16V), though its operating temperature range (0°C ~ 70°C) is narrower than the CD74HC4066E specification.

Surface-Mount Alternatives (PCB Redesign Required)

CD74HC4066PWR and CD74HC4066M are Texas Instruments variants in surface-mount packages (14-TSSOP and 14-SOIC respectively). CD74HC4066PWR maintains Active product status with full electrical equivalence to the CD74HC4066E. CD74HC4066M is designated Last Time Buy, similar to the original part. Both surface-mount options require PCB layout modifications and are suitable for new designs or redesign cycles.

Product Status Considerations

For applications requiring long-term supply assurance, TC74HC4066APF and MAX4066CPD+ are recommended due to Active product status. CD74HC4066PWR is the preferred Texas Instruments alternative with Active status and equivalent electrical performance. Parts designated Last Time Buy (CD74HC4066E and CD74HC4066M) should be phased out in favor of Active alternatives.

Compliance and Certification

All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, consistent with the CD74HC4066E specifications.

Frequently Asked Questions (FAQ)

Q: Can CD74HC4066PWR replace CD74HC4066E directly on the PCB?

A: No. CD74HC4066PWR uses a 14-TSSOP surface-mount package, while CD74HC4066E uses a 14-DIP through-hole package. Electrical functionality is identical, but PCB layout and soldering methods differ. Direct socket replacement is not possible without PCB redesign.

Q: What is the difference between TC74HC4066APF and CD74HC4066E?

A: Both are 4-circuit SPST-NO switches in 14-DIP through-hole packages with 200MHz bandwidth. TC74HC4066APF has slightly higher on-state resistance (80Ohm vs. 70Ohm), lower channel-to-channel matching (5Ohm vs. 500mOhm), and narrower operating temperature range (-40°C ~ 85°C vs. -55°C ~ 125°C). TC74HC4066APF is Active status, making it suitable for new designs.

Q: Is MAX4066CPD+ a suitable replacement for CD74HC4066E?

A: MAX4066CPD+ is electrically compatible in 14-DIP through-hole format with superior leakage current (1nA vs. 100nA) and lower on-state resistance (45Ohm vs. 70Ohm). However, its operating temperature range (0°C ~ 70°C) is narrower than CD74HC4066E (-55°C ~ 125°C). Verify application temperature requirements before selection.

Q: Why does CD74HC4066M have higher channel capacitance than CD74HC4066E?

A: CD74HC4066M uses a 14-SOIC surface-mount package with different die and packaging geometry compared to the 14-DIP CD74HC4066E. The 10pF channel capacitance specification reflects these physical differences. Both maintain 200MHz bandwidth and are functionally equivalent for most applications.

Q: Can I use CD74HC4066PWR as a drop-in replacement?

A: No. CD74HC4066PWR requires surface-mount assembly and PCB redesign. It is not a drop-in replacement for through-hole applications. Use TC74HC4066APF or MAX4066CPD+ for through-hole socket compatibility.

Q: What is the significance of the -72dB crosstalk specification?

A: Crosstalk measures signal coupling between independent switch circuits. The -72dB specification indicates isolation between channels at 1MHz. MAX4066CPD+ offers superior crosstalk performance (-86dB), while TC74HC4066APF has lower isolation (-60dB). Select based on application sensitivity to inter-channel signal coupling.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (CD74HC4066PWR, CD74HC4066M, MAX4066CPD+, and TC74HC4066APF) are ROHS3 Compliant and REACH Unaffected, matching the CD74HC4066E compliance status.

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