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HCPL-181-06DE Equivalent & Substitute Parts
Part Overview
The HCPL-181-06DE is an optoisolator with transistor output manufactured by Broadcom Limited. This single-channel device provides 3750Vrms isolation with a 4-Mini-Flat surface mount package. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameter ranges for this optoisolator category.
Substiute Parts
Key Parameters
| Parameter | HCPL-181-06DE |
|---|---|
| Manufacturer | Broadcom Limited |
| Number of Channels | 1 |
| Voltage - Isolation | 3750Vrms |
| Current Transfer Ratio (Min) | 300% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA |
| Output Type | Transistor |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Vce Saturation (Max) | 200mV |
| Operating Temperature | -55°C ~ 100°C |
| Mounting Type | Surface Mount |
| Package / Case | 4-SMD, Gull Wing |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility is determined by matching the following critical parameters:
- Voltage - Isolation: 3750Vrms (mandatory match)
- Number of Channels: 1 (mandatory match)
- Output Type: Transistor (mandatory match)
- Voltage - Output (Max): 80V (mandatory match)
- Current Transfer Ratio range overlap with HCPL-181-06DE (300-600% @ 5mA)
- Vce Saturation (Max): acceptable within 200-400mV range
- Operating Temperature: minimum -40°C to -55°C and maximum 100°C to 110°C
- Mounting Type: Surface Mount (mandatory match)
- RoHS Status: ROHS3 Compliant (mandatory match)
Substitute parts are grouped by manufacturer and packaging configuration. Parametric equivalents maintain identical electrical specifications. Manufacturer-recommended alternatives provide functional equivalence with allowable parameter variations within the optoisolator transistor output category.
Parameter Comparison
| Parameter | HCPL-181-06DE | HCPL-181-00DE | EL357N(C)(TA)-VG | EL357N-G | FODM121 | FODM121A | FODM121AR2V |
|---|---|---|---|---|---|---|---|
| Manufacturer | Broadcom Limited | Broadcom Limited | Everlight Electronics | Everlight Electronics | onsemi | onsemi | onsemi |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Isolation | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms |
| Current Transfer Ratio (Min) | 300% @ 5mA | 300% @ 5mA | 200% @ 5mA | 50% @ 5mA | 50% @ 5mA | 100% @ 5mA | 100% @ 5mA |
| Current Transfer Ratio (Max) | 600% @ 5mA | 600% @ 5mA | 400% @ 5mA | 600% @ 5mA | 600% @ 5mA | 300% @ 5mA | 300% @ 5mA |
| Output Type | Transistor | Transistor | Transistor | Transistor | Transistor | Transistor | Transistor |
| Voltage - Output (Max) | 80V | 80V | 80V | 80V | 80V | 80V | 80V |
| Current - Output / Channel | 50mA | 50mA | 50mA | 50mA | 80mA | 80mA | 80mA |
| Vce Saturation (Max) | 200mV | 200mV | 200mV | 200mV | 400mV | 400mV | 400mV |
| Operating Temperature | -55°C ~ 100°C | -55°C ~ 100°C | -55°C ~ 110°C | -55°C ~ 110°C | -40°C ~ 110°C | -40°C ~ 110°C | -40°C ~ 110°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing | 4-SMD, Gull Wing |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
HCPL-181-00DE is a parametric equivalent from Broadcom Limited with identical electrical specifications and operating temperature range. This part maintains full compatibility with HCPL-181-06DE designs.
EL357N(C)(TA)-VG and EL357N-G from Everlight Electronics provide functional equivalence with 3750Vrms isolation and transistor output. These parts support extended operating temperature to 110°C. Current Transfer Ratio minimum of 200% and 50% respectively represents a lower bound compared to HCPL-181-06DE; designs must accommodate this variation.
FODM121, FODM121A, and FODM121AR2V from onsemi are manufacturer-recommended alternatives. These parts deliver higher output current capability (80mA vs 50mA) and extended temperature range to 110°C. Vce Saturation maximum of 400mV is higher than HCPL-181-06DE; circuit designs must account for increased saturation voltage. FODM121A and FODM121AR2V provide Current Transfer Ratio of 100-300% @ 5mA, suitable for applications requiring controlled gain characteristics.
All substitute parts maintain ROHS3 compliance, Active product status, and surface mount configuration. Selection depends on specific application requirements for output current, saturation voltage tolerance, and operating temperature range.
Frequently Asked Questions (FAQ)
Q: Can HCPL-181-00DE replace HCPL-181-06DE directly?
A: Yes. HCPL-181-00DE is a parametric equivalent with identical isolation voltage, current transfer ratio range, output voltage, saturation voltage, and operating temperature. Both parts use 4-Mini-Flat packaging and are ROHS3 compliant.
Q: What is the key difference between Broadcom and Everlight optoisolators in this list?
A: Broadcom parts (HCPL-181-06DE and HCPL-181-00DE) specify Current Transfer Ratio minimum of 300% @ 5mA. Everlight EL357N variants specify lower minimums (200% for EL357N(C)(TA)-VG and 50% for EL357N-G). Both manufacturers maintain 3750Vrms isolation and 80V maximum output voltage. Operating temperature extends to 110°C for Everlight parts.
Q: Why do onsemi FODM121 variants have higher output current (80mA vs 50mA)?
A: FODM121 series is designed with higher current capability. This allows greater output drive capability but requires circuit evaluation for saturation voltage impact, as Vce Saturation maximum is 400mV compared to 200mV for HCPL-181-06DE.
Q: Are package differences between 4-Mini-Flat and 4-SOP significant?
A: Both are 4-SMD, Gull Wing surface mount packages. 4-Mini-Flat (HCPL-181-06DE) and 4-SOP (EL357N variants) have different physical dimensions and PCB footprints. Mechanical compatibility must be verified during design integration.
Q: Which substitute part is best for low-temperature applications below -40°C?
A: HCPL-181-06DE and HCPL-181-00DE support -55°C minimum operating temperature. EL357N variants support -55°C minimum. onsemi FODM121 series supports -40°C minimum. For applications requiring -55°C operation, select Broadcom or Everlight parts.
Q: Can FODM121A be used where HCPL-181-06DE is specified?
A: FODM121A provides functional equivalence with 3750Vrms isolation and transistor output. Current Transfer Ratio range is 100-300% @ 5mA (narrower than HCPL-181-06DE at 300-600%). Vce Saturation is 400mV maximum (higher than 200mV). Output current is 80mA (higher than 50mA). Circuit design must accommodate these parameter differences.
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