PS2765-1-F3-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2765-1-F3-A is a single-channel optoisolator with transistor output manufactured by CEL, rated for 3750Vrms isolation voltage. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement. The part operates across a wide temperature range from -55°C to 100°C and is housed in a 4-SOP surface mount package. Due to its obsolete status, equivalent active alternatives are required for new designs and production continuity.

Substiute Parts

PS2765-1-F3-A

CELIn Stock: 30183PS2765-1-F3-A Datasheet

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FODM2705R2

onsemiIn Stock: 110269FODM2705R2 Datasheet

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HCPL-354-000E

Broadcom LimitedIn Stock: 12556HCPL-354-000E Datasheet

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LTV-354T

Lite-On Inc.In Stock: 90406LTV-354T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS2765-1-F3-A optoisolator is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

• Isolation voltage rating of 3750Vrms
• Single-channel configuration
• Transistor output topology
• Surface mount package with 4-pin gull wing configuration
• Input capability for both AC and DC signals
• Current Transfer Ratio range compatibility (minimum 50% at specified test current)
• Maximum output voltage of 35V or greater
• Maximum output current of 40mA or greater
• Operating temperature range encompassing -55°C to 100°C or broader

Secondary Compatibility Factors:

• Vce saturation voltage (maximum 300mV)
• Forward voltage characteristics
• Rise and fall time specifications
• Moisture sensitivity level MSL 1

The three identified substitute parts meet these criteria with variations in specific performance characteristics that remain within acceptable operational boundaries for this component category.

Parameter Comparison

Engineering Selection Recommendations

FODM2705R2 (onsemi): This substitute provides the closest electrical match to the PS2765-1-F3-A, with identical isolation voltage and current transfer ratio specifications at 5mA test current. The FODM2705R2 offers superior output current capability at 80mA compared to the original 40mA specification. The part is ROHS3 compliant and maintains active product status. The operating temperature range extends to 110°C, providing broader thermal coverage. This part is suitable for direct replacement in applications where the extended output current capability does not create design conflicts.

HCPL-354-000E (Broadcom Limited): This substitute maintains identical isolation voltage and matching output voltage/current specifications. The HCPL-354-000E features improved Vce saturation performance at 200mV maximum, compared to 300mV in the original part. The part operates across the same temperature range as the PS2765-1-F3-A (-55°C to 100°C) and is ROHS3 compliant with active product status. The package designation differs as 4-Mini-Flat rather than 4-SOP, requiring PCB layout verification for pin compatibility.

LTV-354T (Lite-On Inc.): This substitute offers identical isolation voltage and equivalent electrical performance with 200mV Vce saturation. The LTV-354T maintains the 4-SOP package configuration matching the original part, facilitating direct PCB compatibility. The part is ROHS3 compliant and active in production. The operating temperature range extends to 110°C. This part provides the most straightforward mechanical substitution path.

All three substitutes carry REACH Unaffected status and EAR99 ECCN classification, matching the regulatory profile of the original component.

Frequently Asked Questions (FAQ)

Q: Can FODM2705R2 replace PS2765-1-F3-A in all applications?

A: FODM2705R2 is electrically compatible based on isolation voltage, channel count, output type, and current transfer ratio specifications. The higher maximum output current (80mA versus 40mA) does not create incompatibility. Verify that the operating temperature range of -40°C to 110°C meets application requirements, as the lower limit is 15°C higher than the original part.

Q: What is the primary difference between HCPL-354-000E and the original PS2765-1-F3-A?

A: The HCPL-354-000E uses a 4-Mini-Flat package instead of the 4-SOP package. Both maintain 3750Vrms isolation and single-channel transistor output. The Mini-Flat package has different pin spacing and orientation, requiring PCB layout modification. Electrical performance is equivalent with improved Vce saturation characteristics.

Q: Is LTV-354T the best choice for direct substitution?

A: LTV-354T provides the most direct mechanical substitution, as it retains the 4-SOP package configuration of the PS2765-1-F3-A. Electrical specifications are equivalent with improved Vce saturation. The operating temperature range extends to 110°C, providing broader thermal coverage than the original -55°C to 100°C specification.

Q: Are all three substitutes RoHS compliant?

A: Yes. FODM2705R2, HCPL-354-000E, and LTV-354T are all ROHS3 compliant. The original PS2765-1-F3-A RoHS status is not specified in available documentation.

Q: What is the significance of the Current Transfer Ratio test conditions?

A: PS2765-1-F3-A specifies Current Transfer Ratio at 5mA input current, while HCPL-354-000E and LTV-354T specify at 1mA. Lower test current typically results in higher transfer ratio values. FODM2705R2 matches the 5mA test condition of the original part, providing direct performance comparison.

Q: Can these parts be used interchangeably on the same PCB?

A: FODM2705R2 and LTV-354T are pin-compatible with the PS2765-1-F3-A in 4-SOP packages. HCPL-354-000E requires PCB modification due to its 4-Mini-Flat package. Verify footprint compatibility before assembly.

Q: What inventory status should influence part selection?

A: FODM2705R2 has the highest inventory availability at 110,200 pieces. LTV-354T has 90,300 pieces available. HCPL-354-000E has 12,520 pieces available. Procurement lead times and supply chain stability should factor into long-term design decisions.