PS320ESA Equivalent & Substitute Parts

Part Overview

The PS320ESA 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 operates with dual supply voltages (±2.7V ~ 8V) and features a 35Ohm on-state resistance, making it suitable for analog signal switching and multiplexing applications.

The PS320ESA is currently classified as obsolete. Equivalent substitute parts from Analog Devices Inc./Maxim Integrated are available to maintain design continuity and ensure supply chain reliability for applications requiring this switch topology.

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)	300mOhm
Voltage - Supply, Dual (V±)	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	150ns, 100ns
Charge Injection	8pC
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

Substitute Part Grouping Explanation

Substitution of the PS320ESA is determined by strict equivalence across the following critical parameters:

Switch topology: SPST - NO configuration with 2 circuits in 1:1 multiplexer arrangement
On-state resistance: 35Ohm maximum
Supply voltage range: ±2.7V ~ 8V dual supply
Package: 8-SOIC surface mount form factor
Electrical performance: Switch timing (Ton/Toff), leakage current, crosstalk, and channel capacitance

The MAX320 series from Analog Devices Inc./Maxim Integrated satisfies all electrical and mechanical requirements for direct substitution. All substitute parts maintain identical switch circuit topology, on-state resistance, supply voltage specifications, and package configuration. Differences in charge injection (2pC vs. 8pC for the main part) and operating temperature ranges are noted but do not prevent functional substitution when application requirements are met.

Parameter Comparison

Parameter	PS320ESA	MAX320ESA+	MAX320CSA+	MAX320CSA+T	MAX320ESA+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
On-State Resistance (Max)	35Ohm	35Ohm	35Ohm	35Ohm	35Ohm
Channel-to-Channel Matching (ΔRon)	300mOhm	300mOhm	300mOhm	300mOhm	300mOhm
Voltage - Supply, Dual (V±)	±2.7V ~ 8V	±2.7V ~ 8V	±2.7V ~ 8V	±2.7V ~ 8V	±2.7V ~ 8V
Switch Time (Ton, Toff) (Max)	150ns, 100ns	150ns, 100ns	150ns, 100ns	150ns, 100ns	150ns, 100ns
Charge Injection	8pC	2pC	2pC	2pC	2pC
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	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°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)
Packaging Type	Tube	Tube	Tube	Tape & Reel (TR)	Tape & Reel (TR)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All MAX320 variants are direct functional equivalents to the PS320ESA and are suitable for replacement in new designs and production continuity applications.

MAX320ESA+ is the primary direct substitute, maintaining identical operating temperature range (-40°C ~ 85°C) and offering improved charge injection performance (2pC vs. 8pC). This variant is available in tube packaging and carries active product status with ROHS3 compliance.

MAX320ESA+T provides the same electrical specifications and temperature range as MAX320ESA+ in tape and reel packaging, suitable for high-volume automated assembly processes.

MAX320CSA+ and MAX320CSA+T operate within a narrower temperature range (0°C ~ 70°C) and are available in tube and tape & reel packaging respectively. These variants are appropriate for applications where the extended low-temperature performance of the -40°C rating is not required.

All substitute parts are ROHS3 compliant, addressing regulatory requirements that the obsolete PS320ESA does not meet. Selection between tube and tape & reel packaging should be based on assembly process requirements and volume considerations.

Frequently Asked Questions (FAQ)

Q: Can MAX320CSA+ be used in applications requiring -40°C operation?

A: No. MAX320CSA+ and MAX320CSA+T are specified for 0°C ~ 70°C operating temperature. For applications requiring -40°C ~ 85°C operation, use MAX320ESA+ or MAX320ESA+T.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging (PS320ESA, MAX320ESA+, MAX320CSA+) is suitable for lower-volume applications and manual handling. Tape & reel packaging (MAX320ESA+T, MAX320CSA+T) is designed for automated pick-and-place assembly in high-volume production. Electrical specifications are identical between packaging types.

Q: Does the lower charge injection of MAX320 variants (2pC vs. 8pC) affect compatibility?

A: Lower charge injection is a performance improvement that does not prevent substitution. Applications designed for the PS320ESA will function correctly with MAX320 variants, which introduce less charge injection error.

Q: Are all substitute parts pin-compatible with PS320ESA?

A: Yes. All substitute parts use the 8-SOIC package with identical pinout and electrical interface specifications.

Q: What is the RoHS compliance status of these parts?

A: PS320ESA is RoHS non-compliant. All MAX320 variants (MAX320ESA+, MAX320CSA+, MAX320ESA+T, MAX320CSA+T) are ROHS3 compliant, meeting current regulatory requirements for electronic components.

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