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TLP781F(D4ADGBT7,F Equivalent & Substitute Parts
Part Overview
The TLP781F(D4ADGBT7,F is a photocoupler optoisolator with transistor output manufactured by Toshiba Semiconductor and Storage. This component provides galvanic isolation up to 5000Vrms with a single channel configuration in a 4-DIP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations where this isolation specification is required.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | TLP781F(D4ADGBT7,F |
| Manufacturer | Toshiba Semiconductor and Storage |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 5000Vrms |
| Current Transfer Ratio (Min) | 100% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA |
| Output Type | Transistor |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Operating Temperature | -55°C ~ 110°C |
| Package / Case | 4-DIP (0.400", 10.16mm) |
| Mounting Type | Through Hole |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility for the TLP781F(D4ADGBT7,F is determined by strict equivalence across the following critical parameters:
- Voltage isolation rating: 5000Vrms
- Number of channels: 1
- Output configuration: Transistor output
- Current transfer ratio range: 100% to 600% @ 5mA
- Maximum output voltage: 80V
- Maximum output current per channel: 50mA
- Package type: 4-DIP (0.400", 10.16mm)
- Mounting method: Through Hole
- Operating temperature range: -55°C ~ 110°C
The TLP785F(D4GBT7,F meets all specified electrical and mechanical parameters and qualifies as a direct substitute. The primary distinction is product status: TLP785F(D4GBT7,F is active production, whereas TLP781F(D4ADGBT7,F is obsolete.
Parameter Comparison
| Parameter | TLP781F(D4ADGBT7,F | TLP785F(D4GBT7,F |
|---|---|---|
| Manufacturer | Toshiba Semiconductor and Storage | Toshiba Semiconductor and Storage |
| Number of Channels | 1 | 1 |
| Voltage - Isolation | 5000Vrms | 5000Vrms |
| Current Transfer Ratio (Min) | 100% @ 5mA | 100% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA | 600% @ 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) | 60 mA | 60 mA |
| Vce Saturation (Max) | 400mV | 400mV |
| Operating Temperature | -55°C ~ 110°C | -55°C ~ 110°C |
| Package / Case | 4-DIP (0.400", 10.16mm) | 4-DIP (0.400", 10.16mm) |
| Mounting Type | Through Hole | Through Hole |
| Product Status | Obsolete | Active |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| ECCN | EAR99 | EAR99 |
| HTSUS | 8541.49.8000 | 8541.49.8000 |
Engineering Selection Recommendations
The TLP785F(D4GBT7,F is the appropriate substitute for the obsolete TLP781F(D4ADGBT7,F. Both components share identical electrical specifications, timing characteristics, and mechanical packaging. The TLP785F(D4GBT7,F maintains active production status, ensuring long-term availability and supply chain continuity. Both parts carry equivalent export classification (EAR99) and tariff codes, with identical moisture sensitivity ratings. Selection of the TLP785F(D4GBT7,F eliminates obsolescence risk while preserving full functional compatibility in existing circuit designs.
Frequently Asked Questions (FAQ)
Q: Can TLP785F(D4GBT7,F directly replace TLP781F(D4ADGBT7,F in existing designs?
A: Yes. Both components are electrically and mechanically identical across all specified parameters. Pin configuration, package dimensions, and electrical performance are equivalent. No circuit modifications are required.
Q: What is the primary reason to substitute TLP781F(D4ADGBT7,F?
A: The TLP781F(D4ADGBT7,F is classified as obsolete. The TLP785F(D4GBT7,F is the active production equivalent, ensuring continued availability and supply chain reliability.
Q: Are the isolation voltage ratings identical?
A: Yes. Both components provide 5000Vrms isolation voltage with identical current transfer ratio specifications (100% to 600% @ 5mA).
Q: Do both parts use the same package and mounting method?
A: Yes. Both are 4-DIP (0.400", 10.16mm) through-hole packages with identical pin spacing and mounting requirements.
Q: Are there any compliance or certification differences?
A: No. Both components carry identical ECCN (EAR99), HTSUS codes (8541.49.8000), and moisture sensitivity levels (MSL 1 - Unlimited).
Q: What is the operating temperature range for both parts?
A: Both components operate across -55°C to 110°C, with identical timing characteristics (3µs turn-on/off, 2µs/3µs rise/fall times).
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