PS323ESAE Equivalent & Substitute Parts

Part Overview

The PS323ESAE is a 2-circuit SPST-NO (Single Pole Single Throw - Normally Open) IC switch manufactured by Diodes Incorporated, housed in an 8-SOIC package. This interface component features a 35Ohm on-state resistance and operates across a 2.5V to 16V supply range. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Substitute parts from Analog Devices Inc./Maxim Integrated maintain functional compatibility while offering active product status and extended availability.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO
Number of Circuits	2
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	35Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm
Voltage - Supply, Single (V+)	2.5V ~ 16V
Switch Time (Ton, Toff) (Max)	75ns, 50ns
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-85dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PS323ESAE is determined by the following critical parameters:

Functional Compatibility Requirements:

Switch circuit type: SPST - NO
Number of circuits: 2
Multiplexer/Demultiplexer configuration: 1:1
Package type: 8-SOIC with identical physical dimensions (0.154", 3.90mm Width)
Channel-to-Channel Matching (ΔRon): 800mOhm

Electrical Operating Range:

Supply voltage range must encompass or overlap with 2.5V ~ 16V
Charge injection: 1pC
Channel capacitance: 9pF, 9pF
Leakage current: 100pA maximum
Crosstalk: -85dB @ 1MHz

Environmental & Compliance:

RoHS3 compliance required
MSL rating: 1 (Unlimited)
REACH unaffected status

The MAX323 series (Analog Devices Inc./Maxim Integrated) satisfies all functional and electrical requirements. All substitute parts maintain identical circuit topology, package footprint, and key electrical characteristics. Differences in on-state resistance (60Ohm vs. 35Ohm) and switching speed represent acceptable trade-offs within the interface IC switch category, as these parameters do not affect pin compatibility or basic switching functionality.

Parameter Comparison

Parameter	PS323ESAE (Main)	MAX323CSA+	MAX323CSA+T	MAX323ESA+	MAX323ESA+T
Manufacturer	Diodes Incorporated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active	Active	Active	Active
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	2	2	2	2	2
Multiplexer/Demultiplexer Circuit	1:1	1:1	1:1	1:1	1:1
On-State Resistance (Max)	35Ohm	60Ohm	60Ohm	60Ohm	60Ohm
Channel-to-Channel Matching (ΔRon)	800mOhm	800mOhm	800mOhm	800mOhm	800mOhm
Voltage - Supply, Single (V+)	2.5V ~ 16V	2.7V ~ 16V	2.7V ~ 16V	2.7V ~ 16V	2.7V ~ 16V
Switch Time (Ton, Toff) (Max)	75ns, 50ns	150ns, 100ns	150ns, 100ns	150ns, 100ns	150ns, 100ns
Charge Injection	1pC	1pC	1pC	1pC	1pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF	9pF, 9pF	9pF, 9pF	9pF, 9pF	9pF, 9pF
Current - Leakage (IS(off)) (Max)	100pA	100pA	100pA	100pA	100pA
Crosstalk	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Packaging Type	Not specified	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Extended Temperature Range Applications (-40°C to 85°C): Select MAX323ESA+ (Tube packaging) or MAX323ESA+T (Tape & Reel packaging). These variants maintain the full operating temperature range of the obsolete PS323ESAE, ensuring compatibility with designs requiring extended thermal performance.

For Standard Temperature Range Applications (0°C to 70°C): MAX323CSA+ (Tube packaging) or MAX323CSA+T (Tape & Reel packaging) are suitable alternatives. These parts offer active product status and full availability while meeting standard industrial temperature requirements.

Packaging Considerations:

Tube packaging (MAX323CSA+, MAX323ESA+): Appropriate for lower-volume applications and manual assembly processes
Tape & Reel packaging (MAX323CSA+T, MAX323ESA+T): Optimized for high-volume automated assembly and pick-and-place operations

All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring regulatory and environmental compatibility with the original PS323ESAE specification.

Frequently Asked Questions (FAQ)

Q: Can MAX323 series parts directly replace PS323ESAE in existing designs? A: Yes. All MAX323 variants maintain identical pin configuration, 8-SOIC package footprint, and core switching functionality. PCB layout and schematic integration require no modification.

Q: What is the impact of the 60Ohm on-state resistance in MAX323 versus the 35Ohm specification of PS323ESAE? A: The 60Ohm resistance represents a 71% increase in on-state resistance. This affects signal attenuation and power dissipation characteristics. Applications with strict impedance or power budget requirements must evaluate this parameter against circuit specifications.

Q: Which MAX323 variant should be selected for new production designs? A: MAX323ESA+T is recommended for new designs requiring extended temperature range (-40°C to 85°C) with automated assembly. This part offers active product status, full availability, and Tape & Reel packaging optimized for manufacturing efficiency.

Q: Are there temperature range limitations when substituting PS323ESAE with MAX323CSA+ or MAX323CSA+T? A: Yes. MAX323CSA variants operate within 0°C to 70°C, which is narrower than the PS323ESAE range of -40°C to 85°C. Applications requiring extended low-temperature operation below 0°C or high-temperature operation above 70°C must use MAX323ESA+ or MAX323ESA+T variants.

Q: Do all substitute parts meet the same compliance and regulatory requirements? A: Yes. All MAX323 variants are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (Unlimited) rating, matching the environmental and regulatory profile of PS323ESAE.

Q: What is the difference between Tube and Tape & Reel packaging options? A: Tube packaging is suitable for manual handling and lower-volume applications. Tape & Reel packaging is designed for automated pick-and-place assembly and high-volume production. Both packaging types contain identical die and electrical specifications.

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