LTV-816S-TA1
LITEON
Needs validationlow risk
Very strong alternative from the same manufacturer with matching CTR and an upgraded VCEO.
Best Alternatives to LTV-817S-TA1
Finding a substitute for the LITEON LTV-817S-TA1 phototransistor optocoupler involves checking for compatible SMD packages and similar electrical characteristics. Several strong alternatives exist from LITEON and other major manufacturers.
AI replacement insight
Package riskmedium
Candidates are in SOP-4/SMD packages, but footprint must be verified to ensure a match.
Electrical risklow
Most candidates match or exceed key electrical specs. Different CTR bins may require testing.
Sourcing risklow
The 817-style optocoupler is a widely multi-sourced component, providing many sourcing options.
Can it be replaced directly?
There are several strong candidates that are likely direct replacements, such as LTV-816S-TA1 and FOD817ASD. However, pinout and package footprint verification against the datasheets is required before they can be considered drop-in.
Best replacement path
The best replacement path is to select a part from the LTV-816S series or a cross-vendor equivalent like the onsemi FOD817ASD. These offer upgraded VCEO while maintaining package compatibility and CTR range.
Main risk
The main risk is physical incompatibility. While many candidates use a standard SOP-4 package, slight variations in dimensions or land patterns can exist. Electrical risks include sensitivity to different CTR gain bins.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | LTV-817S-TA1 | LTV-816S-TA1 | FOD817ASD | LTV-816S-TA1-D | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SMD-4 | 4-SMD | 4-SMD, Gull Wing | 4-pin SOP | 4-SMD / 4-SMD, Gull Wing / 4-pin SOP — Compatible SMD package. Verify footprint.; FOD817ASD: Standard SOP-4 package, should be compatible. Verify footprint.; LTV-816S-TA1-D: SOP-4 package is compatible with target's SMD-4. Verify footprint.; LTV-816S-TP-D-CU: Likely SOP-4 package, compatible with target's SMD-4. Verify footprint. |
| Ctr | 50-600% | 50% - 600% | 50-600% | 300-600% | 50% - 600% / 50-600% / 300-600% — CTR range matches target exactly.; FOD817ASD: CTR range matches target exactly.; LTV-816S-TA1-D: Higher gain bin (Rank D). May affect loop stability.; LTV-816S-TP-D-CU: Higher gain bin (Rank D). May affect loop stability. |
| Voltage | ~35V-70V (817 family) | 80 V | 70 V | 80 V | 80 V / 70 V — VCEO is an upgrade.; FOD817ASD: VCEO is an upgrade.; LTV-816S-TA1-D: VCEO is an upgrade.; LTV-816S-TP-D-CU: VCEO is an upgrade. |
| Temperature | -55°C to +110°C (typical cross) | - | -55°C to +110°C | -50°C to +110°C | -55°C to +110°C / -50°C to +110°C — Wider operating temperature range.; LTV-816S-TA1-D: Wider operating temperature range. |
Application & sourcing insights
Questions & answers
The best alternatives for LTV-817S-TA1 are LTV-816S-TA1 from the same manufacturer or FOD817ASD from onsemi. Both offer compatible packages, matching CTR, and an upgraded collector-emitter voltage, but require datasheet verification.