PS4066ACSDEX Equivalent & Substitute Parts

Part Overview

The PS4066ACSDEX is a 4-circuit SPST-NO analog switch IC manufactured by Diodes Incorporated, housed in a 14-SOIC package. This component functions as a single-pole single-throw switch with 45Ohm on-state resistance, designed for signal routing and multiplexing applications across supply voltages from 3V to 16V. The part is classified as Obsolete, necessitating identification of functionally equivalent alternatives from active product lines to ensure design continuity and procurement availability.

Key Parameters

Parameter	PS4066ACSDEX
Manufacturer	Diodes Incorporated
Switch Circuit Type	SPST - NO
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	45Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm
Voltage - Supply, Single (V+)	3V ~ 16V
Switch Time (Ton, Toff) (Max)	100ns, 75ns
-3dB Bandwidth	100MHz
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-86dB @ 1MHz
Operating Temperature	0°C ~ 70°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PS4066ACSDEX is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Switch circuit topology: SPST - NO (single-pole single-throw, normally open)
Circuit count: 4 independent circuits
Multiplexer configuration: 1:1
Package type: 14-SOIC form factor
On-state resistance range: 45Ohm nominal specification
Supply voltage compatibility: Minimum 3V operation required
Channel-to-channel matching: 500mOhm tolerance class

Acceptable Variation Parameters:

On-state resistance: Parts with 45Ohm specification are direct equivalents; parts with 35Ohm, 20Ohm, or 10Ohm specifications operate within acceptable tolerance for signal routing applications where lower resistance provides performance benefit
Operating temperature: Extended ranges (-40°C to 125°C) are acceptable for designs operating within 0°C to 70°C
Leakage current: Specifications from 100pA to 5µA are acceptable for analog switching applications
Bandwidth and switching speed: Higher performance specifications are acceptable substitutes

Non-Substitutable Variations:

Different circuit count or topology
Package form factor deviation from 14-SOIC
Supply voltage maximum below 16V
Crosstalk performance below -50dB @ 1MHz

Parameter Comparison

Parameter	PS4066ACSDEX	MAX4066ESD+T	74HC4066D,653	74HCT4066D,118	74LV4066D,118	74LVC4066D,118	CD74HCT4066M96	HEF4066BT,653	MAX4066ACSD+
Manufacturer	Diodes Inc.	Analog Devices/Maxim	Nexperia	Nexperia	Nexperia	Nexperia	Texas Instruments	Nexperia	Analog Devices/Maxim
Switch Circuit	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)	45Ohm	45Ohm	95Ohm	20Ohm (Typ)	35Ohm	10Ohm	70Ohm	155Ohm	45Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	500mOhm	3Ohm	3Ohm	—	—	500mOhm	5Ohm	500mOhm
Voltage - Supply, Single (V+)	3V ~ 16V	2V ~ 16V	2V ~ 10V	4.5V ~ 5.5V	1V ~ 6V	1.65V ~ 5.5V	4.5V ~ 5.5V	3V ~ 15V	2V ~ 16V
Switch Time (Ton, Toff) (Max)	100ns, 75ns	100ns, 75ns	30ns, 20ns	44ns, 30ns	16ns, 28ns	3.9ns, 5ns	—	—	100ns, 75ns
-3dB Bandwidth	100MHz	100MHz	200MHz	200MHz	200MHz	500MHz	200MHz	90MHz	100MHz
Charge Injection	2pC	1pC	—	—	—	7.5pC	—	—	1pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF	9pF, 9pF	4.6pF	4.6pF	4.6pF	8pF	5pF	7.5pF	9pF, 9pF
Current - Leakage (IS(off)) (Max)	100pA	1nA	1µA	1µA	2µA	5µA	100nA	200nA	100pA
Crosstalk	-86dB @ 1MHz	-86dB @ 1MHz	-60dB @ 1MHz	-60dB @ 1MHz	-60dB @ 1MHz	-56dB @ 1MHz	-72dB @ 1MHz	-50dB @ 1MHz	-86dB @ 1MHz
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Equivalent (Direct Replacement): MAX4066ACSD+ and MAX4066ESD+T are direct functional equivalents to the PS4066ACSDEX. Both maintain identical on-state resistance (45Ohm), channel-to-channel matching (500mOhm), switching characteristics (100ns/75ns), bandwidth (100MHz), and crosstalk performance (-86dB @ 1MHz). Both are Active status products with ROHS3 compliance. MAX4066ACSD+ operates within the original temperature range (0°C ~ 70°C), while MAX4066ESD+T extends to -40°C ~ 85°C. Both are supplied by Analog Devices Inc./Maxim Integrated with established supply chain availability.

Secondary Equivalents (Acceptable Substitutes with Performance Trade-offs): CD74HCT4066M96 and CD74HCT4066MT (Texas Instruments) provide equivalent circuit topology and package form factor with 70Ohm on-state resistance and 500mOhm matching tolerance. These parts maintain -72dB crosstalk and 200MHz bandwidth, suitable for applications where slightly elevated on-state resistance is acceptable. Both are Active status with ROHS3 compliance and extended operating temperature range (-55°C ~ 125°C).

74LVC4066D,118 (Nexperia) offers superior performance with 10Ohm on-state resistance, 500MHz bandwidth, and 3.9ns/5ns switching times. This part is recommended for designs requiring lower signal attenuation and faster switching response. Operating voltage range (1.65V ~ 5.5V) requires verification for compatibility with 3V minimum supply requirement of the original design.

74HCT4066D,118 (Nexperia) provides 20Ohm on-state resistance with 200MHz bandwidth and 44ns/30ns switching times. This part is suitable for 5V-centric designs but has restricted supply voltage range (4.5V ~ 5.5V), limiting applicability to designs operating at the upper end of the original 3V ~ 16V specification.

Not Recommended: HEF4066BT,653 exhibits 155Ohm on-state resistance and -50dB crosstalk, representing significant performance degradation unsuitable for signal routing applications requiring the original part's performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can I use 74LVC4066D,118 as a direct replacement for PS4066ACSDEX in a 3V application? A: No. The 74LVC4066D,118 has a minimum supply voltage of 1.65V, which is compatible with 3V operation. However, verify that your circuit design does not depend on the original part's 3V ~ 16V supply range. The 74LVC4066D,118 maximum supply is 5.5V, restricting use in designs requiring operation above 5.5V.

Q: What is the difference between MAX4066ACSD+ and MAX4066ESD+T? A: Both parts are electrically identical with 45Ohm on-state resistance and equivalent performance. The primary difference is packaging: MAX4066ACSD+ is supplied in Tube packaging, while MAX4066ESD+T is supplied in Tape & Reel (TR) format. MAX4066ESD+T also extends the operating temperature range to -40°C ~ 85°C compared to MAX4066ACSD+ at 0°C ~ 70°C. Select based on procurement requirements and temperature operating conditions.

Q: Is the 14-SOIC package pinout identical across all substitute parts? A: All substitute parts listed use the 14-SOIC (0.154", 3.90mm Width) package form factor. Verify pinout compatibility with the original PS4066ACSDEX datasheet before PCB layout finalization, as some manufacturers may implement different pin assignments despite identical package dimensions.

Q: Can I substitute a part with lower on-state resistance (e.g., 74LVC4066D,118 at 10Ohm) without circuit modification? A: Yes. Lower on-state resistance reduces signal attenuation and improves signal integrity. No circuit modification is required. However, verify that the reduced resistance does not introduce unintended loading effects on signal sources or alter impedance matching in your application.

Q: What is the impact of using CD74HCT4066M96 with 70Ohm resistance instead of the original 45Ohm specification? A: The 70Ohm on-state resistance increases signal attenuation by approximately 56% compared to the original 45Ohm specification. For analog signal routing applications, this may introduce measurable signal loss. Evaluate the impact on signal-to-noise ratio and overall system performance before implementation.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed in this document are ROHS3 compliant, matching the compliance status of the original PS4066ACSDEX.

Q: Which substitute part offers the best performance for high-frequency applications? A: 74LVC4066D,118 provides the highest bandwidth (500MHz) and fastest switching times (3.9ns/5ns), making it optimal for high-frequency signal routing. However, verify supply voltage compatibility with your design, as this part operates within 1.65V ~ 5.5V range.

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