FOD816W Equivalent & Substitute Parts

Part Overview

The FOD816W is an optoisolator with Darlington output configuration, rated for 5000Vrms isolation voltage. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The FOD816W provides single-channel isolation with Darlington output topology suitable for AC and DC input applications requiring high isolation ratings and moderate output current capability.

Substiute Parts

FOD816W

onsemiIn Stock: 3321FOD816W 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

Substitution for the FOD816W is determined by strict equivalence across the following critical parameters:

• Isolation Voltage: 5000Vrms (mandatory match)
• Number of Channels: 1 (mandatory match)
• Output Type: Darlington (mandatory match)
• Current Transfer Ratio Range: 600% - 7500% @ 1mA (mandatory match)
• Maximum Output Current: 80mA (mandatory match)
• Maximum Output Voltage: 35V (mandatory match)
• Vce Saturation: 1V maximum (mandatory match)
• Operating Temperature Range: -30°C ~ 100°C (mandatory match)
• Input Type: AC, DC (mandatory match)
• Mounting Type: Through Hole (mandatory match)
• Package Type: 4-DIP (mandatory match)

The substitute parts LTV-8141 and LTV-8141M meet all electrical and mechanical requirements for direct substitution. Both are manufactured by Lite-On Inc. / LITEON and maintain active product status, providing long-term availability compared to the obsolete FOD816W.

Parameter Comparison

Engineering Selection Recommendations

Both LTV-8141 and LTV-8141M are qualified substitutes for the obsolete FOD816W based on complete electrical parameter equivalence and identical functional specifications.

LTV-8141 is recommended for new designs and procurement where package footprint flexibility is acceptable. This variant features a 4-DIP package with 0.300" (7.62mm) body length and is supplied in tube packaging. Active product status ensures long-term availability and supply chain stability.

LTV-8141M is recommended for applications requiring exact mechanical compatibility with the original FOD816W footprint. This variant maintains the 4-DIP package with 0.400" (10.16mm) body length, matching the original dimensions precisely. Active product status and ROHS3 compliance provide regulatory alignment for modern manufacturing environments.

Both substitute parts carry ROHS3 compliance certification, providing environmental and regulatory advantages over the obsolete FOD816W. Moisture sensitivity level remains unchanged at MSL 1 (Unlimited), indicating no special handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can LTV-8141 and LTV-8141M be used interchangeably with FOD816W?

A: Both LTV-8141 and LTV-8141M meet all electrical specifications for direct substitution. The primary difference is package body length: LTV-8141 uses 0.300" (7.62mm) while LTV-8141M uses 0.400" (10.16mm). Select based on PCB layout requirements and available footprint space.

Q: What is the difference between LTV-8141 and LTV-8141M?

A: Electrical performance is identical. The "M" suffix in LTV-8141M indicates a variant with 0.400" (10.16mm) package body length, matching the original FOD816W dimensions. LTV-8141 uses a shorter 0.300" (7.62mm) body. Both are through-hole mounted 4-DIP packages.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both LTV-8141 and LTV-8141M are ROHS3 compliant, meeting current environmental regulations. The original FOD816W does not specify RoHS status.

Q: What is the current transfer ratio specification?

A: Both the FOD816W and substitute parts specify a current transfer ratio range of 600% to 7500% at 1mA input current. This parameter defines the ratio of output current to input current and remains constant across all three part numbers.

Q: Are there any thermal or operating condition differences?

A: Operating temperature range is identical across all three parts: -30°C to 100°C. Thermal performance characteristics are equivalent, with identical rise and fall times of 60µs and 53µs respectively.

Q: What is the maximum output current capability?

A: All three parts support 80mA maximum output current per channel. With single-channel configuration, this represents the total output current capacity.

Q: Do the substitute parts require different PCB layout considerations?

A: Through-hole mounting remains unchanged. The primary layout consideration is package body length: verify available vertical clearance for the selected variant (0.300" for LTV-8141 or 0.400" for LTV-8141M).