PS393EPE Equivalent & Substitute Parts

Part Overview

The PS393EPE is a 4-circuit IC switch manufactured by Diodes Incorporated, featuring SPST NO/NC switching configuration with 1:1 multiplexer/demultiplexer functionality in a 16-DIP package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The part operates across a wide supply voltage range (3V to 15V single supply, or ±3V to ±8V dual supply) with low on-state resistance of 45Ohm maximum and fast switching characteristics suitable for analog signal routing applications.

Substiute Parts

PS393EPE

Diodes IncorporatedIn Stock: 759PS393EPE Datasheet

Current PartRFQ

LTC203CN#PBF

Linear TechnologyIn Stock: 863LTC203CN#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS393EPE is determined by the following core parameters:

Mandatory Matching Criteria:

• Switch circuit type: SPST - NO/NC configuration
• Number of circuits: 4 independent switching channels
• Multiplexer/demultiplexer ratio: 1:1
• Package type: 16-DIP form factor (0.300", 7.62mm)
• Mounting type: Through Hole

Functional Compatibility Parameters:

• On-state resistance must not exceed application requirements (PS393EPE: 45Ohm max)
• Supply voltage range must encompass or exceed the operating range of the target application
• Switch timing characteristics (Ton, Toff) must meet application speed requirements
• Leakage current specifications must satisfy low-power or precision circuit requirements
• Operating temperature range must cover the intended deployment environment

The LTC203CN#PBF qualifies as a functional equivalent based on matching switch circuit topology, circuit count, multiplexer configuration, and package form factor. However, electrical performance differs in specific parameters, requiring application-level assessment.

Parameter Comparison

Engineering Selection Recommendations

PS393EPE (Diodes Incorporated):

• Obsolete status limits long-term availability and manufacturer support
• RoHS non-compliant; unsuitable for applications requiring RoHS certification
• Optimal for legacy system maintenance where existing inventory is available
• Superior electrical performance in on-state resistance, leakage current, and switching speed

LTC203CN#PBF (Linear Technology):

• Active product status ensures ongoing availability and technical support
• Suitable for new designs and systems requiring long-term component sourcing
• Narrower supply voltage range (5V single supply) and operating temperature range (0°C to 70°C) require application verification
• Higher on-state resistance (125Ohm vs. 45Ohm) and slower switching times (400ns/300ns vs. 130ns/75ns) necessitate circuit-level compatibility assessment
• Increased leakage current (5nA vs. 100pA) and charge injection (8pC vs. 3pC) may impact precision analog applications

Selection between these parts depends on application-specific requirements for supply voltage range, switching speed, on-state resistance, leakage characteristics, and operating temperature environment.

Frequently Asked Questions (FAQ)

Q: Can LTC203CN#PBF directly replace PS393EPE in existing designs?

A: Physical package compatibility is confirmed (both 16-DIP, 0.300" pitch). Electrical compatibility requires application-level assessment. The LTC203CN#PBF exhibits higher on-state resistance (125Ohm vs. 45Ohm), slower switching times (400ns/300ns vs. 130ns/75ns), higher leakage current (5nA vs. 100pA), and narrower supply voltage range (5V single supply vs. 3V-15V). Designs sensitive to these parameters require circuit modification or alternative parts.

Q: What are the critical parameters for IC switch substitution?

A: Substitution eligibility is determined by: (1) identical switch circuit topology (SPST NO/NC), (2) matching circuit count (4 circuits), (3) identical multiplexer configuration (1:1), (4) compatible package form factor (16-DIP), and (5) electrical parameters within application tolerance (on-state resistance, supply voltage range, switching speed, leakage current, operating temperature).

Q: Is LTC203CN#PBF suitable for low-temperature applications?

A: No. LTC203CN#PBF operating temperature range is 0°C to 70°C. Applications requiring operation below 0°C or above 70°C are outside the specified range. PS393EPE supports -40°C to 85°C. Alternative parts with extended temperature ratings must be evaluated for such applications.

Q: How does the higher on-state resistance of LTC203CN#PBF affect circuit performance?

A: On-state resistance directly impacts signal attenuation, power dissipation, and impedance matching in analog signal routing applications. LTC203CN#PBF at 125Ohm maximum introduces 2.78× greater resistance than PS393EPE at 45Ohm. Applications with impedance-sensitive circuits or low-level signal routing require circuit analysis to confirm acceptable performance.

Q: What is the significance of charge injection differences between these parts?

A: Charge injection (3pC for PS393EPE vs. 8pC for LTC203CN#PBF) represents charge transferred to the signal path during switching transitions. Higher charge injection introduces transient distortion in precision analog circuits, sample-and-hold applications, and multiplexed measurement systems. Applications requiring low charge injection should prioritize PS393EPE or evaluate alternative low-charge-injection switch ICs.

Q: Are there supply voltage compatibility issues between these parts?

A: Yes. PS393EPE supports 3V to 15V single supply or ±3V to ±8V dual supply. LTC203CN#PBF supports 5V single supply or ±15V dual supply. Applications operating at 3V, 4V, or below 5V single supply cannot use LTC203CN#PBF. Dual-supply applications at ±8V or lower cannot use LTC203CN#PBF. Verify application supply voltage requirements before substitution.