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TLP781(BLL-LF6,F) Equivalent & Substitute Parts
Part Overview
The TLP781(BLL-LF6,F) is a single-channel optoisolator with transistor output, rated for 5000Vrms isolation voltage. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The TLP785(BLL-LF6,F) serves as a direct functional substitute while maintaining identical electrical and mechanical specifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Number of Channels | 1 |
| Voltage - Isolation | 5000Vrms |
| Current Transfer Ratio (Min) | 200% @ 5mA |
| Current Transfer Ratio (Max) | 400% @ 5mA |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs |
| Rise / Fall Time (Typ) | 2µs, 3µs |
| Output Type | Transistor |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Vce Saturation (Max) | 400mV |
| Operating Temperature | -55°C ~ 110°C |
| Package / Case | 4-SMD, Gull Wing |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the TLP781(BLL-LF6,F) is determined by strict equivalence across the following critical parameters:
- Single-channel configuration
- 5000Vrms isolation voltage rating
- Current transfer ratio range: 200% to 400% @ 5mA
- Switching time specifications: 3µs turn-on/off, 2µs/3µs rise/fall times
- Transistor output topology with 80V maximum output voltage
- 50mA maximum output current per channel
- 400mV maximum Vce saturation voltage
- Surface mount 4-SMD gull wing package
- Operating temperature range: -55°C to 110°C
- MSL Level 1 moisture sensitivity classification
The TLP785(BLL-LF6,F) meets all specified parameters without deviation, establishing it as a direct equivalent.
Parameter Comparison
| Parameter | TLP781(BLL-LF6,F) | TLP785(BLL-LF6,F) |
|---|---|---|
| Manufacturer | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage |
| Product Status | Obsolete | Active |
| Number of Channels | 1 | 1 |
| Voltage - Isolation | 5000Vrms | 5000Vrms |
| Current Transfer Ratio (Min) | 200% @ 5mA | 200% @ 5mA |
| Current Transfer Ratio (Max) | 400% @ 5mA | 400% @ 5mA |
| Turn On / Turn Off Time (Typ) | 3µs, 3µs | 3µs, 3µs |
| Rise / Fall Time (Typ) | 2µs, 3µs | 2µs, 3µs |
| Input Type | DC | DC |
| Output Type | Transistor | Transistor |
| Voltage - Output (Max) | 80V | 80V |
| Current - Output / Channel | 50mA | 50mA |
| Voltage - Forward (Vf) (Typ) | 1.15V | 1.15V |
| Current - DC Forward (If) (Max) | 60mA | 60mA |
| Vce Saturation (Max) | 400mV | 400mV |
| Operating Temperature | -55°C ~ 110°C | -55°C ~ 110°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 4-SMD, Gull Wing | 4-SMD, Gull Wing |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| ECCN | EAR99 | EAR99 |
| HTSUS | 8541.49.8000 | 8541.49.8000 |
Engineering Selection Recommendations
The TLP785(BLL-LF6,F) is the appropriate substitute for the obsolete TLP781(BLL-LF6,F). Both components are manufactured by Toshiba Semiconductor and Storage and carry identical electrical specifications, switching characteristics, and package configurations. The TLP785 maintains active product status, ensuring availability for procurement and compliance with current supply chain requirements. Both parts share equivalent export classification (EAR99) and tariff coding (8541.49.8000), with no regulatory or compliance barriers to substitution.
Frequently Asked Questions (FAQ)
Q: Can the TLP785(BLL-LF6,F) be used as a direct replacement for the TLP781(BLL-LF6,F)?
A: Yes. The TLP785 is electrically and mechanically identical to the TLP781 across all specified parameters, including isolation voltage, current transfer ratio, switching times, output voltage and current ratings, and package configuration.
Q: What is the primary reason for substitution?
A: The TLP781 is classified as obsolete. The TLP785 is an active product offering identical functionality with assured supply availability.
Q: Are there any package or pinout differences?
A: No. Both components use the 4-SMD gull wing surface mount package with identical pinout and mechanical dimensions.
Q: Do both parts meet the same environmental and compliance standards?
A: Yes. Both components operate across the -55°C to 110°C temperature range, carry MSL Level 1 moisture sensitivity classification, and share identical export and tariff classifications.
Q: Is there any performance difference between the two parts?
A: No. All electrical parameters, including isolation voltage, current transfer ratio, switching times, and output characteristics, are identical.
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