PS323ESA Equivalent & Substitute Parts

Part Overview

The PS323ESA is a 2-circuit SPST-NO (Single Pole Single Throw - Normally Open) IC switch manufactured by Diodes Incorporated, housed in an 8-SOIC surface mount package. This component features a maximum on-state resistance of 35Ohm and operates across a supply voltage range of 2.5V to 16V. The PS323ESA is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The MAX323 series from Analog Devices Inc./Maxim Integrated provides direct functional alternatives with enhanced specifications and active product status.

Key Parameters

Parameter	PS323ESA
Manufacturer	Diodes Incorporated
Switch Circuit Type	SPST - NO
Number of Circuits	2
Multiplexer/Demultiplexer Circuit	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)
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PS323ESA is determined by the following critical parameters that must remain compatible:

Functional Equivalence Requirements:

Switch circuit type: SPST - NO (maintained across all substitutes)
Number of circuits: 2 (maintained across all substitutes)
Multiplexer/Demultiplexer circuit: 1:1 (maintained across all substitutes)
Package type: 8-SOIC surface mount (maintained across all substitutes)
Channel-to-Channel Matching (ΔRon): 800mOhm (maintained across all substitutes)
Charge Injection: 1pC (maintained across all substitutes)
Channel Capacitance: 9pF, 9pF (maintained across all substitutes)
Current - Leakage (IS(off)): 100pA (maintained across all substitutes)
Crosstalk: -85dB @ 1MHz (maintained across all substitutes)

Allowable Parameter Variations:

On-State Resistance (Max): PS323ESA specifies 35Ohm; MAX323 series specifies 60Ohm. The higher resistance in substitutes is acceptable for applications where the PS323ESA's lower resistance is not a critical design constraint.
Voltage - Supply, Single (V+): PS323ESA operates 2.5V ~ 16V; MAX323 series operates 2.7V ~ 16V. The minimum voltage threshold is slightly higher in substitutes but remains compatible with standard supply voltages.
Switch Time: PS323ESA specifies 75ns (Ton), 50ns (Toff); MAX323 series specifies 150ns (Ton), 100ns (Toff). Slower switching times in substitutes are acceptable for non-time-critical applications.
Operating Temperature: PS323ESA operates -40°C ~ 85°C; MAX323CSA+/MAX323CSA+T operate 0°C ~ 70°C; MAX323ESA+/MAX323ESA+T operate -40°C ~ 85°C. Temperature range selection depends on application requirements.
Packaging Format: Tube or Tape & Reel options available; selection depends on assembly and procurement requirements.

Parameter Comparison

Parameter	PS323ESA	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
Switch Circuit Type	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	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
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)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Not specified	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Inventory Availability	657 Pcs New Original In Stock	2070 Pcs New Original In Stock	5818 Pcs New Original In Stock	1900 Pcs New Original In Stock	2340 Pcs New Original In Stock

Engineering Selection Recommendations

For New Designs and Production: The MAX323 series (MAX323CSA+, MAX323CSA+T, MAX323ESA+, MAX323ESA+T) from Analog Devices Inc./Maxim Integrated is the recommended substitute for the obsolete PS323ESA. All MAX323 variants maintain active product status and achieve ROHS3 compliance, addressing regulatory requirements and long-term supply chain stability.

Temperature Range Selection:

MAX323ESA+ or MAX323ESA+T: Select these variants for applications requiring the extended operating temperature range of -40°C ~ 85°C, matching the PS323ESA specification.
MAX323CSA+ or MAX323CSA+T: Select these variants for applications operating within the 0°C ~ 70°C range, suitable for standard commercial and industrial environments.

Packaging Format Selection:

Tube packaging (MAX323CSA+, MAX323ESA+): Suitable for manual assembly, prototyping, and low-volume production.
Tape & Reel packaging (MAX323CSA+T, MAX323ESA+T): Suitable for automated assembly and high-volume production, with significantly higher inventory availability.

Compliance Considerations: The PS323ESA is RoHS non-compliant. All MAX323 substitutes are ROHS3 compliant, making them mandatory for applications subject to RoHS regulations. Both the PS323ESA and all MAX323 variants are REACH Unaffected and classified as EAR99 for export control purposes.

Frequently Asked Questions (FAQ)

Q: Can MAX323 parts directly replace PS323ESA in existing designs? A: Yes, all MAX323 variants are direct functional replacements. The 8-SOIC package, pin configuration, and core switching characteristics (SPST-NO, 2 circuits, 1:1 multiplexing) are identical. However, design verification is necessary if the application depends on the PS323ESA's lower on-state resistance (35Ohm vs. 60Ohm) or faster switching times (75ns/50ns vs. 150ns/100ns).

Q: What is the difference between MAX323CSA+ and MAX323ESA+ variants? A: The primary difference is operating temperature range. MAX323CSA+ operates 0°C ~ 70°C (commercial grade), while MAX323ESA+ operates -40°C ~ 85°C (extended industrial grade). Select MAX323ESA+ for applications requiring the full temperature range equivalent to PS323ESA.

Q: Should I choose Tube or Tape & Reel packaging? A: Tube packaging is appropriate for manual assembly, prototyping, and low-volume applications. Tape & Reel packaging is required for automated pick-and-place assembly and high-volume production. Tape & Reel variants (MAX323CSA+T, MAX323ESA+T) also offer significantly higher inventory availability.

Q: Are there any electrical performance differences I should consider? A: The MAX323 series specifies higher on-state resistance (60Ohm vs. 35Ohm) and slower switching times (150ns/100ns vs. 75ns/50ns). These differences are acceptable for most applications but must be evaluated if your design operates at the limits of the PS323ESA's specifications. All other electrical parameters (charge injection, channel capacitance, leakage current, crosstalk) are identical.

Q: Is the minimum supply voltage difference significant? A: The MAX323 series minimum supply voltage is 2.7V compared to PS323ESA's 2.5V. This 0.2V difference is negligible for standard supply voltages (3.3V, 5V, 12V, 16V) but must be verified for applications operating near 2.5V.

Q: What is the RoHS compliance status, and why does it matter? A: PS323ESA is RoHS non-compliant; all MAX323 variants are ROHS3 compliant. RoHS compliance is mandatory for products sold in the European Union and increasingly required by major OEMs globally. Use MAX323 substitutes for any new design or production requiring regulatory compliance.

Q: Can I mix packaging formats in the same production run? A: Packaging format selection should be consistent within a production run to maintain assembly process efficiency. However, both Tube and Tape & Reel formats contain identical components; the choice affects only procurement and assembly logistics, not electrical performance.

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