PS320CUAE Equivalent & Substitute Parts

Part Overview

The PS320CUAE is a 2-circuit IC switch manufactured by Diodes Incorporated, configured as a SPST-NO (Single Pole Single Throw - Normally Open) device with 35Ohm on-state resistance in an 8-MSOP package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations. The part operates across a dual supply voltage range of ±2.7V to ±8V and is suitable for analog signal switching applications requiring low on-state resistance and fast switching times.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPST - NO
Number of Circuits	2
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	35Ohm
Channel-to-Channel Matching (ΔRon)	300mOhm
Voltage - Supply, Dual (V±)	±2.7V ~ 8V
Switch Time - Ton (Max)	150ns
Switch Time - Toff (Max)	100ns
Charge Injection	8pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-85dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the PS320CUAE is determined by strict equivalence across the following critical parameters:

Switch circuit configuration (SPST - NO)
Number of circuits (2)
Multiplexer/Demultiplexer circuit ratio (1:1)
On-state resistance maximum (35Ohm)
Channel-to-channel matching tolerance (300mOhm)
Dual supply voltage range (±2.7V ~ 8V)
Switch timing specifications (Ton 150ns max, Toff 100ns max)
Channel capacitance values (9pF, 9pF)
Leakage current specification (100pA max)
Crosstalk performance (-85dB @ 1MHz)
Operating temperature range (0°C ~ 70°C)
Surface mount package compatibility (8-MSOP footprint)
RoHS3 compliance requirement

The MAX320CUA+ from Analog Devices Inc./Maxim Integrated meets all these critical parameters and is classified as an active product, providing long-term availability and support.

Parameter Comparison

Parameter	PS320CUAE (Diodes Inc.)	MAX320CUA+ (Analog Devices/Maxim)
Switch Circuit	SPST - NO	SPST - NO
Number of Circuits	2	2
Multiplexer/Demultiplexer Circuit	1:1	1:1
On-State Resistance (Max)	35Ohm	35Ohm
Channel-to-Channel Matching (ΔRon)	300mOhm	300mOhm
Voltage - Supply, Dual (V±)	±2.7V ~ 8V	±2.7V ~ 8V
Switch Time - Ton (Max)	150ns	150ns
Switch Time - Toff (Max)	100ns	100ns
Channel Capacitance (CS(off), CD(off))	9pF, 9pF	9pF, 9pF
Current - Leakage (IS(off)) (Max)	100pA	100pA
Crosstalk	-85dB @ 1MHz	-85dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The MAX320CUA+ is the direct parametric equivalent for PS320CUAE replacement. Both parts maintain identical electrical specifications across all critical switching parameters, supply voltage requirements, and timing characteristics. The MAX320CUA+ holds active product status with Analog Devices Inc./Maxim Integrated, ensuring continued availability, technical support, and manufacturing consistency.

Both parts are ROHS3 compliant and suitable for applications requiring dual-supply analog switching. The MAX320CUA+ features improved moisture sensitivity level (MSL 1 - Unlimited versus MSL 3 - 168 Hours), providing enhanced reliability in storage and handling conditions. Pin-to-pin compatibility and identical package footprints (8-MSOP) enable direct substitution in existing PCB designs without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can MAX320CUA+ directly replace PS320CUAE in existing designs?

A: Yes. The MAX320CUA+ is a direct parametric equivalent with identical electrical specifications, pin configuration, and package footprint. No circuit modifications are required for substitution.

Q: Are there differences in charge injection between these parts?

A: The MAX320CUA+ specifies 2pC charge injection compared to 8pC for the PS320CUAE. This represents improved performance and does not affect compatibility in applications designed for the PS320CUAE.

Q: What is the significance of the different MSL ratings?

A: The PS320CUAE carries MSL 3 (168 Hours), while MAX320CUA+ carries MSL 1 (Unlimited). MSL 1 indicates superior moisture resistance and longer shelf life without baking requirements, providing operational advantages for inventory management and long-term storage.

Q: Are both parts available in the same package?

A: Yes. Both the PS320CUAE and MAX320CUA+ are supplied in 8-MSOP packages with identical 0.118" (3.00mm) width specifications, ensuring PCB footprint compatibility.

Q: What supply voltage range do these parts support?

A: Both parts operate across a dual supply voltage range of ±2.7V to ±8V, supporting a wide range of analog signal switching applications.

Q: Is the MAX320CUA+ suitable for new designs?

A: Yes. The MAX320CUA+ is classified as an active product with full manufacturer support, making it the appropriate choice for new designs requiring this switch circuit topology.

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