FOD816 Equivalent & Substitute Parts

Part Overview

The FOD816 is an optoisolator with Darlington output configuration, rated for 5000Vrms isolation voltage. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The FOD816 provides galvanic isolation for AC and DC input signals with a single-channel Darlington output stage, suitable for applications requiring high-voltage isolation in industrial and consumer electronics.

Substiute Parts

FOD816

onsemiIn Stock: 52324FOD816 Datasheet

Current PartRFQ

LTV-8141

Lite-On Inc.In Stock: 3138LTV-8141 Datasheet

DirectRFQ

LTV-8141M

LITEONIn Stock: 3102LTV-8141M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FOD816 are qualified based on the following critical parameters that determine functional equivalence:

• Isolation voltage rating of 5000Vrms
• Single-channel configuration
• Darlington output stage
• Current transfer ratio range of 600% to 7500% @ 1mA
• Maximum output voltage of 35V
• Maximum output current of 80mA
• Rise and fall time specifications of 60µs and 53µs
• AC and DC input capability
• Operating temperature range of -30°C to 100°C
• Through-hole mounting in 4-DIP package

The LTV-8141 and LTV-8141M meet all these electrical and mechanical parameters, establishing them as direct functional equivalents to the obsolete FOD816.

Parameter Comparison

Engineering Selection Recommendations

Both LTV-8141 and LTV-8141M are active products from Lite-On Inc. and LITEON, providing direct electrical equivalence to the obsolete FOD816. Selection between these substitutes depends on package footprint requirements:

The LTV-8141 maintains the original 4-DIP (0.300", 7.62mm) package footprint, enabling direct board-level replacement without PCB modification. This variant is ROHS3 compliant and available in tube packaging.

The LTV-8141M uses a 4-DIP (0.400", 10.16mm) package footprint, which differs from the FOD816 original spacing. This variant is also ROHS3 compliant and suitable for applications where the larger package pitch is acceptable or preferred.

Both substitutes carry REACH Unaffected status and EAR99 ECCN classification, matching the regulatory profile of the original FOD816.

Frequently Asked Questions (FAQ)

Q: Can LTV-8141 and LTV-8141M be used interchangeably with FOD816?

A: Both parts meet all electrical specifications of the FOD816. The LTV-8141 is the preferred direct replacement due to identical 4-DIP (0.300", 7.62mm) package dimensions. The LTV-8141M has a larger package pitch (0.400", 10.16mm) and requires PCB layout verification before substitution.

Q: What is the primary reason for substituting FOD816?

A: The FOD816 is classified as obsolete. LTV-8141 and LTV-8141M are active products with ongoing manufacturer support and availability, ensuring long-term supply chain reliability.

Q: Are the substitute parts RoHS compliant?

A: Yes, both LTV-8141 and LTV-8141M are ROHS3 compliant. The original FOD816 RoHS status is not specified in available documentation.

Q: Do package differences affect circuit performance?

A: No. The electrical performance is identical across all three parts. Package differences affect only PCB footprint and board layout. The LTV-8141 (0.300" pitch) provides direct footprint compatibility with FOD816 designs.

Q: What is the moisture sensitivity level for these parts?

A: All three parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.