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HCPL-270L#500 Equivalent & Substitute Parts
Part Overview
The HCPL-270L#500 is a single-channel optoisolator with Darlington output manufactured by Broadcom Limited, rated for 3750Vrms isolation voltage. This component is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates in the 0°C to 70°C temperature range with a maximum output current of 60mA per channel and is packaged in an 8-DIP Gull Wing surface mount configuration.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | HCPL-270L#500 |
| Manufacturer | Broadcom Limited |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 3750Vrms |
| Current Transfer Ratio (Min) | 300% @ 1.6mA |
| Current Transfer Ratio (Max) | 2600% @ 1.6mA |
| Turn On / Turn Off Time (Typ) | 25µs, 50µs |
| Input Type | DC |
| Output Type | Darlington |
| Voltage - Output (Max) | 7V |
| Current - Output / Channel | 60mA |
| Voltage - Forward (Vf) (Typ) | 1.5V |
| Current - DC Forward (If) (Max) | 20mA |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-SMD, Gull Wing |
| RoHS Status | RoHS non-compliant |
| Product Status | Discontinued at DiGi Electronics |
Substitute Part Grouping Explanation
Substitute parts for the HCPL-270L#500 are grouped based on the following critical parameters that determine functional compatibility:
Primary Matching Criteria:
- Number of Channels: 1
- Input Type: DC
- Output Type: Darlington or Darlington with Base
- Mounting Type: Surface Mount
- Package / Case: 8-SMD, Gull Wing
- Current - Output / Channel: 60mA (maximum)
- Voltage - Isolation: Equal to or greater than 3750Vrms
Substitution Categories:
Category 1: Direct Parametric Equivalent HCPL-270L-500E (Broadcom Limited) maintains identical electrical specifications to the main part with improved product status (Active) and RoHS3 compliance. This part differs only in packaging format (Tape & Reel) and compliance certifications.
Category 2: Enhanced Isolation Voltage Substitutes Parts from Everlight Electronics (6N138S1 series) and Isocom Components (6N138SMT/R) provide 5000Vrms isolation, exceeding the 3750Vrms requirement. These parts feature Darlington with Base output configuration, compatible current transfer ratios, and active product status with RoHS3 compliance.
Category 3: High-Performance Substitutes Vishay Semiconductor 6N139 series parts (6N139-X009, 6N139-X009T, 6N139-X017T) offer 5300Vrms isolation with enhanced current transfer ratio (500% minimum) and extended operating temperature range (-55°C to 100°C). Maximum output voltage increases to 18V, providing greater design flexibility.
Parameter Comparison
| Parameter | HCPL-270L#500 | HCPL-270L-500E | 6N138S1(TA) | 6N138SMT/R | 6N139-X009 | 6N139S1(TA) |
|---|---|---|---|---|---|---|
| Manufacturer | Broadcom | Broadcom | Everlight | Isocom | Vishay | Everlight |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Isolation | 3750Vrms | 3750Vrms | 5000Vrms | 5000Vrms | 5300Vrms | 5000Vrms |
| Current Transfer Ratio (Min) | 300% @ 1.6mA | 300% @ 1.6mA | 300% @ 1.6mA | 300% @ 1.6mA | 500% @ 1.6mA | 500% @ 1.6mA |
| Input Type | DC | DC | DC | DC | DC | DC |
| Output Type | Darlington | Darlington | Darlington with Base | Darlington with Base | Darlington with Base | Darlington with Base |
| Voltage - Output (Max) | 7V | 7V | 7V | 7V | 18V | 18V |
| Current - Output / Channel | 60mA | 60mA | 60mA | 60mA | 60mA | 60mA |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 85°C | 0°C ~ 70°C | -55°C ~ 100°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Discontinued | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
For Direct Replacement with Improved Compliance: HCPL-270L-500E is the primary recommendation for applications requiring minimal design changes. This part maintains identical electrical specifications and operating temperature range while offering active product status and RoHS3 compliance. The only difference is packaging format (Tape & Reel vs. bulk).
For Extended Temperature Range Applications: 6N138S1(TA) and 6N138S1(TB) variants from Everlight Electronics support -40°C to 85°C operation, exceeding the original part's temperature range. These parts maintain compatible current transfer ratios and output current specifications with enhanced isolation voltage (5000Vrms). RoHS3 compliance is standard.
For High-Isolation and High-Performance Requirements: Vishay 6N139 series parts (6N139-X009, 6N139-X009T, 6N139-X017T) provide the highest isolation voltage (5300Vrms) and fastest switching times (600ns turn-on). These parts support extended temperature operation (-55°C to 100°C) and higher maximum output voltage (18V), suitable for demanding industrial applications. All variants carry RoHS3 compliance and active product status.
For High-Volume Production: 6N138SMT/R from Isocom Components offers the largest available inventory (3008 pcs) with Tape & Reel packaging, optimized for automated assembly. This part meets all electrical requirements with 5000Vrms isolation and RoHS3 compliance.
Frequently Asked Questions (FAQ)
Q: Can HCPL-270L-500E be used as a direct drop-in replacement for HCPL-270L#500?
A: Yes. HCPL-270L-500E maintains identical electrical specifications including isolation voltage (3750Vrms), current transfer ratio (300-2600% @ 1.6mA), output current (60mA), and operating temperature range (0°C to 70°C). The primary difference is packaging format (Tape & Reel vs. bulk) and improved RoHS3 compliance status.
Q: What is the key difference between Darlington and Darlington with Base output types?
A: Darlington output (HCPL-270L#500) provides direct transistor output without base access. Darlington with Base output (6N138 and 6N139 series) exposes the base terminal, allowing external base current control for enhanced switching performance and flexibility in circuit design. Both types are electrically compatible for standard switching applications.
Q: Are the Everlight 6N138S1 variants interchangeable?
A: Yes. 6N138S1(TA), 6N138S1(TA)-V, 6N138S1(TB), and 6N138S1(TB)-V are interchangeable. The suffix designations indicate temperature grade and packaging variants. All maintain identical electrical specifications: 5000Vrms isolation, 300% minimum current transfer ratio, 60mA output current, and -40°C to 85°C operating range.
Q: What are the advantages of Vishay 6N139 parts over Everlight 6N138 parts?
A: Vishay 6N139 series offers higher isolation voltage (5300Vrms vs. 5000Vrms), faster switching times (600ns turn-on vs. 200ns-1.4µs), higher current transfer ratio (500% minimum vs. 300%), higher maximum output voltage (18V vs. 7V), and extended operating temperature range (-55°C to 100°C vs. -40°C to 85°C).
Q: Does the 8-SMD Gull Wing package differ from the original 8-DIP Gull Wing package?
A: Both designations refer to the same 8-pin surface mount package with Gull Wing leads. The terminology variation reflects different manufacturer documentation standards. All substitute parts listed are mechanically and electrically compatible with the original package footprint.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All active substitute parts listed (HCPL-270L-500E, 6N138 series, 6N138SMT/R, and 6N139 series) carry RoHS3 compliance certification. The original HCPL-270L#500 is RoHS non-compliant, making RoHS3-compliant substitutes necessary for applications subject to RoHS regulations.
Q: Which substitute part has the fastest switching performance?
A: Vishay 6N139-X009 and 6N139-X009T offer the fastest switching times with 600ns turn-on and 1.5µs turn-off specifications, compared to 25µs and 50µs for the original part. This makes 6N139 series suitable for high-speed switching applications.
Q: Can I use a substitute part with higher isolation voltage in a design rated for 3750Vrms?
A: Yes. Higher isolation voltage ratings provide additional safety margin and are backward compatible. Parts rated for 5000Vrms or 5300Vrms can be used in applications designed for 3750Vrms isolation without circuit modification.
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