PS323ESAEX Equivalent & Substitute Parts

Part Overview

The PS323ESAEX is a 2-circuit SPST-NO IC switch manufactured by Diodes Incorporated, designed for general-purpose switching applications in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The PS323ESAEX operates across a supply voltage range of 2.5V to 16V with a maximum on-state resistance of 35Ohm and switching times of 75ns (turn-on) and 50ns (turn-off).

Key Parameters

Parameter	Value
Manufacturer Part Number	PS323ESAEX
Manufacturer	Diodes Incorporated
Category	Interface
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)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the PS323ESAEX are selected from the MAX323 series manufactured by Analog Devices Inc./Maxim Integrated. The substitution logic is based on the following critical parameters that must align for functional compatibility:

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)

The MAX323 series substitutes differ from the PS323ESAEX in on-state resistance (60Ohm vs. 35Ohm) and switching time specifications, representing acceptable trade-offs for obsolete part replacement. Packaging variants (Tube vs. Tape & Reel) are available to match procurement requirements.

Parameter Comparison

Parameter	PS323ESAEX	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
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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active
Packaging	-	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

All MAX323 series substitutes are active products with ROHS3 compliance and MSL Level 1 rating, providing long-term availability and regulatory alignment for new designs. Selection between substitute options depends on operational temperature requirements and packaging format:

For applications requiring the full -40°C to 85°C operating temperature range, MAX323ESA+ (Tube) or MAX323ESA+T (Tape & Reel) are the appropriate selections, matching the PS323ESAEX temperature specification. For applications with 0°C to 70°C operating temperature requirements, MAX323CSA+ (Tube) or MAX323CSA+T (Tape & Reel) are suitable alternatives.

Packaging selection between Tube and Tape & Reel formats should align with procurement and assembly processes. The Tape & Reel variants (MAX323CSA+T, MAX323ESA+T) provide higher inventory availability and are optimized for automated assembly operations.

Frequently Asked Questions (FAQ)

Q: Can MAX323 series parts directly replace PS323ESAEX in existing designs?

A: MAX323 series parts maintain identical switch circuit topology (SPST-NO), circuit count (2), package type (8-SOIC), and critical electrical parameters (channel matching, charge injection, capacitance, leakage, crosstalk). The primary differences are on-state resistance (60Ohm vs. 35Ohm) and switching time specifications. Design validation is required to confirm these parameter differences do not impact circuit performance.

Q: What is the difference between MAX323CSA+ and MAX323ESA+ variants?

A: The primary difference is operating temperature range. MAX323CSA+ operates from 0°C to 70°C, while MAX323ESA+ operates from -40°C to 85°C. Select MAX323ESA+ for applications requiring extended temperature operation matching the PS323ESAEX specification.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging (MAX323CSA+, MAX323ESA+) is suitable for manual handling and lower-volume assembly. Tape & Reel packaging (MAX323CSA+T, MAX323ESA+T) is optimized for automated pick-and-place assembly and higher-volume production. Both formats contain identical components; selection depends on assembly process requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes, all MAX323 series substitutes are ROHS3 compliant with MSL Level 1 rating, meeting current regulatory requirements for electronic component manufacturing and assembly.

Q: What supply voltage range applies to MAX323 substitutes?

A: MAX323 series parts operate across 2.7V to 16V supply voltage range, compared to PS323ESAEX at 2.5V to 16V. Applications requiring operation below 2.7V require design review to confirm compatibility.

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