PS2561DL1-1Y-V-H-A Optoisolator Equivalent & Substitute Parts

Part Overview

The PS2561DL1-1Y-V-H-A is a high-voltage isolation optoisolator manufactured by CEL, designed for applications requiring galvanic isolation up to 5000Vrms. This component features a single transistor output channel in a 4-DIP package and is classified as discontinued at DiGi Electronics. Due to its discontinued status and limited current inventory (662 pcs), identifying functionally equivalent substitute parts is essential for design continuity and long-term supply chain reliability.

Substiute Parts

PS2561DL1-1Y-V-H-A

CELIn Stock: 708PS2561DL1-1Y-V-H-A Datasheet

Current PartRFQ

LTV-816

Lite-On Inc.In Stock: 45423LTV-816 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PS2561DL1-1Y-V-H-A is determined by the following critical parameters:

Mandatory Matching Criteria:

• Isolation voltage: 5000Vrms
• Number of channels: 1
• Output type: Transistor
• Package type: 4-DIP
• Mounting type: Through Hole
• Input type: DC

Allowable Parameter Ranges for Substitution:

• Current Transfer Ratio: Substitute must meet or exceed the minimum 80% @ 5mA specification
• Maximum Output Voltage: 80V or greater
• Maximum Output Current: 50mA or greater
• Vce Saturation: 300mV or lower preferred for improved performance
• Operating Temperature: Must encompass or exceed the -55°C ~ 110°C range
• Compliance: ROHS3 and REACH status must match or exceed the original part

The LTV-816 manufactured by Lite-On Inc. satisfies all mandatory matching criteria and operates within allowable parameter ranges for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution:

The LTV-816 is qualified as a direct substitute for the PS2561DL1-1Y-V-H-A based on matching isolation voltage, channel count, output type, and package classification. Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements.

Critical Considerations:

1. Package Pitch Difference: The PS2561DL1-1Y-V-H-A uses 0.400" (10.16mm) DIP pitch, while the LTV-816 uses 0.300" (7.62mm) DIP pitch. PCB footprint modification is required for physical substitution.

2. Current Transfer Ratio Minimum: The LTV-816 specifies a 50% minimum CTR @ 5mA compared to 80% for the PS2561DL1-1Y-V-H-A. Circuit designs relying on the higher minimum CTR of the original part must be re-evaluated for the LTV-816.

3. Operating Temperature Range: The PS2561DL1-1Y-V-H-A operates to -55°C, while the LTV-816 operates to -30°C. Applications requiring operation below -30°C cannot use the LTV-816 as a substitute.

4. Supply Chain: The LTV-816 offers superior inventory availability (45,400 pcs) and active manufacturing status, providing long-term supply security compared to the discontinued PS2561DL1-1Y-V-H-A.

Recommendation: Use the LTV-816 for new designs and ongoing production. For existing designs using the PS2561DL1-1Y-V-H-A, verify compatibility with the lower CTR minimum and higher operating temperature minimum before implementation.

Frequently Asked Questions (FAQ)

Q: Can the LTV-816 be used as a direct pin-for-pin replacement?

A: The LTV-816 is functionally equivalent but not pin-for-pin compatible due to different DIP pitch dimensions (0.300" vs. 0.400"). PCB redesign is required for physical substitution.

Q: What is the significance of the Current Transfer Ratio (CTR) difference?

A: The PS2561DL1-1Y-V-H-A guarantees a minimum CTR of 80% @ 5mA, while the LTV-816 guarantees 50% @ 5mA. CTR determines the output current for a given input current. Circuits designed around the higher minimum CTR of the original part may require recalibration or redesign when using the LTV-816.

Q: Are both parts suitable for high-temperature applications?

A: Both parts operate to 110°C maximum. The PS2561DL1-1Y-V-H-A extends to -55°C minimum, while the LTV-816 operates to -30°C minimum. For applications below -30°C, the PS2561DL1-1Y-V-H-A is required.

Q: What are the compliance and regulatory implications of substitution?

A: Both the PS2561DL1-1Y-V-H-A and LTV-816 are ROHS3 compliant and REACH unaffected. Substitution does not introduce regulatory compliance issues.

Q: Why is the LTV-816 recommended despite the lower CTR minimum?

A: The LTV-816 is actively manufactured with substantial inventory availability, ensuring long-term supply continuity. The PS2561DL1-1Y-V-H-A is discontinued. For new designs, the LTV-816 provides superior supply chain reliability. Existing designs must verify CTR compatibility before migration.

Q: How do the switching characteristics compare?

A: Rise and fall times are comparable between both parts (PS2561DL1-1Y-V-H-A: 3µs/5µs; LTV-816: 4µs/3µs). Both are suitable for similar switching speed applications.

Q: What is the impact of the Vce Saturation difference?

A: The LTV-816 exhibits lower Vce saturation (200mV vs. 300mV), resulting in reduced power dissipation and improved efficiency in the output transistor stage. This represents a performance advantage for the LTV-816.