SN74HC4066DR Equivalent & Substitute Parts

Part Overview

The SN74HC4066DR is a 4-circuit SPST-NO (Single Pole Single Throw - Normally Open) analog switch manufactured by Texas Instruments in 14-SOIC surface mount packaging. This device functions as a digitally controlled analog switch with 30Ohm typical on-state resistance, operating across a 2V to 6V supply range. The part is classified as Last Time Buy status, indicating limited future availability. Identifying equivalent and substitute parts is necessary to ensure design continuity, manage supply chain risk, and maintain production schedules when the primary part reaches end-of-life.

Key Parameters

Parameter	SN74HC4066DR
Manufacturer	Texas Instruments
Switch Circuit Type	SPST - NO
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	30Ohm (Typ)
Voltage - Supply, Single (V+)	2V ~ 6V
Switch Time (Ton, Toff) (Max)	31ns, 34ns
-3dB Bandwidth	30MHz
Channel Capacitance (CS(off), CD(off))	0.5pF, 9pF
Current - Leakage (IS(off)) (Max)	100nA
Crosstalk	-45dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN74HC4066DR is determined by the following critical parameters:

Functional Compatibility Requirements:

Switch circuit type must be SPST - NO
Number of circuits must be 4
Multiplexer/Demultiplexer circuit configuration must be 1:1
Package must be 14-SOIC form factor

Electrical Compatibility Criteria:

On-state resistance must not exceed application requirements (SN74HC4066DR: 30Ohm typical)
Supply voltage range must encompass or be compatible with the 2V ~ 6V operating window
Operating temperature range must cover -40°C ~ 85°C minimum
Leakage current, crosstalk, and bandwidth must meet or exceed performance specifications

Compliance & Availability:

RoHS3 compliance required
MSL rating of 1 (Unlimited) preferred
Active or Last Time Buy product status acceptable

Substitute parts are grouped into three categories based on substitution type:

MFR Recommended Substitutes: Parts explicitly recommended by manufacturers as direct replacements with verified compatibility.

Parametric Equivalents: Parts with identical or superior electrical characteristics and same package, differing only in packaging format (Cut Tape vs. Tape & Reel).

Direct Manufacturer Alternatives: Parts from alternative manufacturers meeting functional and electrical requirements with same package footprint.

Parameter Comparison

Parameter	SN74HC4066DR	SN74LV4066ADR	SN74HC4066DT	MC74HC4066ADR2G	74HC4066D,653	74HCT4066D-Q100,11	HEF4066BT,653	MAX4066AESD+	MAX4066AESD+T
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	onsemi	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit Type	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	4	4	4	4	4	4	4	4	4
On-State Resistance (Max)	30Ohm (Typ)	75Ohm	30Ohm (Typ)	70Ohm	95Ohm	20Ohm (Typ)	155Ohm	45Ohm	45Ohm
Voltage - Supply, Single (V+)	2V ~ 6V	2V ~ 5.5V	2V ~ 6V	2V ~ 12V	2V ~ 10V	4.5V ~ 5.5V	3V ~ 15V	2V ~ 16V	2V ~ 16V
Switch Time (Ton, Toff) (Max)	31ns, 34ns	12ns, 12ns	31ns, 34ns	—	30ns, 20ns	44ns, 30ns	—	100ns, 75ns	100ns, 75ns
-3dB Bandwidth	30MHz	50MHz	30MHz	160MHz	200MHz	200MHz	90MHz	100MHz	100MHz
Current - Leakage (IS(off)) (Max)	100nA	100nA	100nA	100nA	1µA	1µA	200nA	100pA	100pA
Crosstalk	-45dB @ 1MHz	-45dB @ 1MHz	-45dB @ 1MHz	-80dB @ 1MHz	-60dB @ 1MHz	-60dB @ 1MHz	-50dB @ 1MHz	-86dB @ 1MHz	-86dB @ 1MHz
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Last Time Buy	Active	Last Time Buy	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Parametric Equivalent (Preferred for Pin-Compatible Replacement):

SN74HC4066DT is the optimal choice for direct substitution. This part maintains identical electrical specifications to the SN74HC4066DR, including 30Ohm typical on-state resistance, 2V ~ 6V supply range, and -40°C ~ 85°C operating temperature. The only difference is packaging format (Tape & Reel vs. Cut Tape). Both parts are manufactured by Texas Instruments and carry ROHS3 compliance. SN74HC4066DT is available in active production status with 2,144 units in stock, providing supply continuity.

MFR Recommended Substitute (Enhanced Performance):

SN74LV4066ADR is the manufacturer-recommended alternative from Texas Instruments. While on-state resistance increases to 75Ohm, this part offers superior performance characteristics: faster switch times (12ns vs. 31ns/34ns), higher bandwidth (50MHz vs. 30MHz), and lower off-state capacitance (5.5pF vs. 9pF). Supply voltage range is slightly reduced to 2V ~ 5.5V, which remains compatible with most 2V ~ 6V applications. Active product status with 2,432 units in stock ensures long-term availability.

Alternative Manufacturer Options (Extended Temperature Range):

MC74HC4066ADR2G (onsemi) and 74HC4066D,653 (Nexperia) provide extended operating temperature ranges (-55°C ~ 125°C and -40°C ~ 125°C respectively), beneficial for industrial and automotive applications. Both maintain 14-SOIC packaging and ROHS3 compliance. MC74HC4066ADR2G offers superior crosstalk performance (-80dB vs. -45dB) and bandwidth (160MHz), while 74HC4066D,653 provides the highest bandwidth (200MHz) among substitutes.

Specialized Application Substitute (Lowest Leakage):

MAX4066AESD+ and MAX4066AESD+T (Analog Devices Inc./Maxim Integrated) deliver exceptional leakage current performance (100pA vs. 100nA), superior crosstalk (-86dB), and extended supply voltage range (2V ~ 16V). These parts are suitable for precision analog switching applications requiring minimal signal degradation. Operating temperature range matches the original part (-40°C ~ 85°C).

Automotive-Grade Option (AEC-Q100 Qualified):

74HCT4066D-Q100,11 (Nexperia) is AEC-Q100 qualified for automotive applications. This part features the lowest on-state resistance (20Ohm typical) among all substitutes, with extended operating temperature (-40°C ~ 125°C). Supply voltage range is restricted to 4.5V ~ 5.5V, limiting compatibility to 5V systems only.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LV4066ADR as a direct replacement for SN74HC4066DR?

A: SN74LV4066ADR is functionally compatible and manufacturer-recommended. The 14-SOIC package footprint is identical, and all four circuits maintain 1:1 multiplexer configuration. However, on-state resistance increases from 30Ohm to 75Ohm. Applications sensitive to signal attenuation or requiring low impedance paths must evaluate this parameter against circuit requirements. Supply voltage range is slightly reduced (2V ~ 5.5V vs. 2V ~ 6V), which is acceptable for most designs operating at 3.3V or 5V.

Q: What is the key difference between SN74HC4066DR and SN74HC4066DT?

A: These parts are electrically and functionally identical. The difference is packaging format only: SN74HC4066DR is supplied in Cut Tape (CT) & Digi-Reel format, while SN74HC4066DT is supplied in Tape & Reel (TR) format. Both are 14-SOIC surface mount packages with identical pin assignments, electrical characteristics, and compliance ratings. Selection depends on assembly line requirements and tape reel compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance status, meeting environmental and regulatory requirements equivalent to the original SN74HC4066DR.

Q: Which substitute offers the best performance for high-frequency applications?

A: 74HC4066D,653 (Nexperia) and MC74HC4066ADR2G (onsemi) provide the highest -3dB bandwidth at 200MHz and 160MHz respectively, compared to 30MHz for the original part. Both maintain 14-SOIC packaging and ROHS3 compliance. 74HC4066D,653 also offers superior crosstalk performance (-60dB) and faster switch times (30ns/20ns).

Q: Can I substitute parts with different on-state resistance values?

A: On-state resistance substitution depends on circuit application. For analog signal switching, lower resistance (20Ohm in 74HCT4066D-Q100,11) reduces signal attenuation and improves bandwidth. Higher resistance values (75Ohm to 155Ohm) are acceptable in applications where impedance matching is not critical. Verify that the substitute's on-state resistance does not exceed circuit impedance requirements or introduce unacceptable signal loss.

Q: What is the significance of the -40°C ~ 85°C operating temperature range?

A: This range defines the ambient temperature limits within which the part maintains specified electrical characteristics. All listed substitutes meet or exceed this range. Extended temperature options (-55°C ~ 125°C) are available from onsemi and Nexperia for industrial and automotive applications requiring operation beyond standard commercial limits.

Q: Is the 14-SOIC package compatible across all substitute parts?

A: Yes. All substitute parts use the 14-SOIC (0.154", 3.90mm Width) surface mount package, ensuring PCB footprint compatibility. Pin assignments and functional circuit topology remain consistent across all substitutes, enabling direct board-level replacement without layout modifications.

Q: Which substitute has the lowest leakage current?

A: MAX4066AESD+ and MAX4066AESD+T deliver the lowest leakage current at 100pA, compared to 100nA for the original part. This 1000x improvement is critical for precision analog applications, battery-powered devices, and low-power signal conditioning circuits. These parts also provide the lowest crosstalk (-86dB) among all substitutes.

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