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HCPL2611SD Equivalent & Substitute Parts
Part Overview
The HCPL2611SD is a logic output optoisolator manufactured by onsemi, featuring 2500Vrms isolation voltage, open collector output, and 10Mbps data rate in an 8-SMD surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The part operates across -40°C to 85°C and supports 4.5V to 5.5V supply voltage with 10kV/µs common mode transient immunity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Part Number | HCPL2611SD |
| Category | Optoisolators |
| Package Type | 8-SMD, Gull Wing |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Voltage - Isolation | 2500Vrms |
| Common Mode Transient Immunity (Min) | 10kV/µs |
| Output Type | Open Collector |
| Current - Output / Channel | 50 mA |
| Data Rate | 10Mbps |
| Propagation Delay tpLH / tpHL (Max) | 75ns / 75ns |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the HCPL2611SD is determined by the following critical parameters: isolation voltage rating, output type (open collector), data rate capability, common mode transient immunity, package form factor, and mounting technology. The substitute parts are grouped into two categories:
Direct Package Substitutes (Through-Hole Alternative): HCPL2611 maintains identical electrical specifications but uses 8-DIP through-hole packaging instead of surface mount, suitable for applications where DIP form factor is acceptable.
Enhanced Isolation Voltage Substitutes (Surface Mount): 6N137SMT&R, HCPL-260L series, and HCPL-2602/2612 series provide equal or superior isolation voltage ratings (3750Vrms to 5000Vrms) while maintaining open collector output, 10Mbps or higher data rates, and surface mount packaging. These parts accommodate designs requiring higher isolation margins or improved noise immunity.
Key Substitution Parameters:
- Isolation voltage: 2500Vrms minimum (higher ratings acceptable)
- Output configuration: Open collector required
- Data rate: 10Mbps minimum
- Common mode transient immunity: 10kV/µs minimum
- Package: 8-SMD surface mount or 8-DIP through-hole
- Supply voltage compatibility: 4.5V ~ 5.5V range
Parameter Comparison
| Parameter | HCPL2611SD | HCPL2611 | 6N137SMT&R | HCPL-260L-300E | HCPL-260L-500E | HCPL-260L-520E | HCPL-260L-560E |
|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | onsemi | Isocom Components 2004 LTD | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited |
| Package Type | 8-SMD, Gull Wing | 8-DIP | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing |
| Mounting Type | Surface Mount | Through Hole | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Isolation | 2500Vrms | 2500Vrms | 5000Vrms | 3750Vrms | 3750Vrms | 5000Vrms | 3750Vrms |
| Common Mode Transient Immunity (Min) | 10kV/µs | 10kV/µs | 5kV/µs | 10kV/µs | 10kV/µs | 10kV/µs | 10kV/µs |
| Output Type | Open Collector | Open Collector | Open Collector | Open Collector, Schottky Clamped | Open Collector, Schottky Clamped | Open Collector, Schottky Clamped | Open Collector, Schottky Clamped |
| Current - Output / Channel | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA |
| Data Rate | 10Mbps | 10Mbps | 10Mbps | 15MBd | 15MBd | 15MBd | 15MBd |
| Propagation Delay tpLH / tpHL (Max) | 75ns / 75ns | 75ns / 75ns | 75ns / 75ns | 75ns / 75ns | 75ns / 75ns | 75ns / 75ns | 75ns / 75ns |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 7V | 2.7V ~ 3.6V, 4.5V ~ 5.5V | 2.7V ~ 3.6V, 4.5V ~ 5.5V | 2.7V ~ 3.6V, 4.5V ~ 5.5V | 2.7V ~ 3.6V, 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -55°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Product Status | Obsolete | Obsolete | Active | Active | Active | Active | Active |
| RoHS Status | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
For applications currently using HCPL2611SD, the following selection criteria apply based on product status and compliance:
HCPL2611: Select this part only if through-hole DIP packaging is required and the design can accommodate the larger footprint. Both parts share identical electrical specifications and obsolete status, making this suitable for legacy system maintenance only.
6N137SMT&R, HCPL-260L series (300E, 500E, 520E, 560E): These active-status parts are recommended for new designs and production transitions. All maintain surface mount 8-SMD packaging compatible with HCPL2611SD footprints. The HCPL-260L variants offer superior isolation voltage (3750Vrms to 5000Vrms) and ROHS3 compliance. The 6N137SMT&R provides the highest isolation rating (5000Vrms) with active product status.
Supply Voltage Consideration: The 6N137SMT&R operates at 7V nominal supply, differing from the HCPL2611SD 4.5V–5.5V range. The HCPL-260L series supports both 2.7V–3.6V and 4.5V–5.5V ranges, providing greater design flexibility.
Compliance: All recommended active substitutes carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can HCPL2611 (DIP package) be used as a direct replacement for HCPL2611SD (SMD package)?
A: Electrically, yes—both parts share identical specifications. However, the DIP package requires through-hole PCB design, while the SMD package uses surface mount technology. PCB layout redesign is necessary for physical compatibility.
Q: What is the primary advantage of HCPL-260L series substitutes over HCPL2611SD?
A: The HCPL-260L series offers higher isolation voltage ratings (3750Vrms to 5000Vrms versus 2500Vrms), active product status for ongoing availability, ROHS3 compliance, and dual supply voltage support (2.7V–3.6V and 4.5V–5.5V). These features provide improved noise immunity and design flexibility.
Q: Is 6N137SMT&R compatible with 4.5V–5.5V supply systems?
A: No. The 6N137SMT&R operates at 7V nominal supply voltage. Circuit redesign is required to accommodate this higher supply requirement. The HCPL-260L series is preferred for 4.5V–5.5V systems.
Q: Do all substitute parts maintain the same propagation delay specifications?
A: Yes. All listed substitutes maintain maximum propagation delay of 75ns for both tpLH and tpHL, ensuring timing compatibility with HCPL2611SD designs.
Q: Which substitute offers the best long-term availability?
A: The HCPL-260L series and 6N137SMT&R all carry active product status, ensuring ongoing manufacturing and supply. The HCPL2611 and HCPL2611SD are both obsolete and should not be selected for new designs.
Q: Are there package footprint differences between HCPL2611SD and HCPL-260L series?
A: Both use 8-SMD Gull Wing packages with identical pinouts, allowing direct PCB footprint compatibility without layout modification.
Q: What is the significance of Schottky clamping in HCPL-260L output stages?
A: Schottky clamping improves output switching speed and reduces parasitic effects, contributing to the 15MBd data rate capability versus 10Mbps in the original HCPL2611SD. This enhancement maintains backward compatibility while improving performance margins.
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