HCPL-2611 Equivalent & Substitute Parts

Part Overview

The HCPL-2611 is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. It features 3750Vrms isolation voltage, 10MBd data rate, and open collector output with Schottky clamping in an 8-DIP package. The product is currently active in production. Equivalent and substitute parts are necessary when the primary part is unavailable, when alternative isolation ratings are required for specific application requirements, or when different manufacturer sourcing is preferred for supply chain optimization.

Substiute Parts

HCPL-2611

Broadcom LimitedIn Stock: 3077HCPL-2611 Datasheet

Current PartRFQ

HCPL-2611-000E

Broadcom LimitedIn Stock: 25494HCPL-2611-000E Datasheet

DirectRFQ

HCPL2611

onsemiIn Stock: 2165HCPL2611 Datasheet

DirectRFQ

FOD260L

Fairchild SemiconductorIn Stock: 5728FOD260L Datasheet

MFR RecommendedRFQ

HCPL2611M

onsemiIn Stock: 12713HCPL2611M Datasheet

MFR RecommendedRFQ

VO2611

Vishay Semiconductor Opto DivisionIn Stock: 12679VO2611 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-2611 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Package / Case: 8-DIP (0.300", 7.62mm) — all substitutes must use identical through-hole DIP packaging
• Number of Channels: 1 — single-channel isolation requirement
• Input Type: DC — digital input signal type
• Mounting Type: Through Hole — PCB assembly compatibility
• Voltage - Supply: 4.5V ~ 5.5V — power supply range compatibility
• Current - Output / Channel: 50 mA — output drive capability

Allowable Variation Parameters:

• Voltage - Isolation: Substitutes with equal or higher isolation rating are acceptable (3750Vrms or greater)
• Common Mode Transient Immunity (Min): Substitutes with equal or higher CMTI are acceptable (15kV/µs or greater)
• Data Rate: Substitutes with equal or higher data rate are acceptable (10MBd or greater)
• Output Type: Open Collector or Open Drain configurations are functionally equivalent in most applications
• Propagation Delay: Substitutes with equal or lower delay are acceptable
• Operating Temperature: Substitutes with equal or wider temperature range are acceptable
• RoHS/REACH Compliance: Preferred for new designs but not mandatory for substitution

Substitutes that deviate from mandatory parameters or fall below allowable variation thresholds are not electrically or mechanically compatible.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Preferred for Drop-In Replacement): HCPL-2611-000E is the direct equivalent from Broadcom Limited with identical electrical specifications and packaging. This part is ROHS3 compliant and maintains full compatibility with existing designs. Selection of this part eliminates any design verification requirements.

Higher Isolation Rating Substitutes (For Enhanced Isolation Requirements): FOD260L, HCPL2611M, and VO2611 provide higher isolation voltages (5000Vrms to 5300Vrms) compared to the HCPL-2611 (3750Vrms). These parts are suitable when applications require greater isolation margins or operate in higher voltage environments. All three are active products with ROHS3 compliance. FOD260L offers the highest CMTI rating (25kV/µs) and extended supply voltage range (3V ~ 5.5V). HCPL2611M and VO2611 support extended operating temperature ranges (-40°C ~ 100°C).

Lower Isolation Rating Substitute (Not Recommended for New Designs): HCPL2611 from onsemi provides 2500Vrms isolation, which is below the HCPL-2611 specification. This part is marked as obsolete and should not be selected for new designs. It is listed only for reference in legacy system maintenance scenarios where isolation requirements are confirmed to be lower than the original specification.

Compliance Consideration: For new designs, HCPL-2611-000E, FOD260L, HCPL2611M, or VO2611 are preferred due to ROHS3 compliance. The original HCPL-2611 is RoHS non-compliant and should be replaced in new production designs.

Frequently Asked Questions (FAQ)

Q: Can HCPL2611 (onsemi, 2500Vrms) be used as a substitute for HCPL-2611? A: No. HCPL2611 provides 2500Vrms isolation, which is below the HCPL-2611 specification of 3750Vrms. Additionally, HCPL2611 is marked as obsolete. Substitution is not recommended unless the application isolation requirement is confirmed to be 2500Vrms or lower.

Q: What is the difference between open collector and open drain outputs? A: Both output types function as switches that pull the output line to ground when active. Open collector uses a bipolar transistor, while open drain uses a MOSFET. For the HCPL-2611 application, VO2611 with open drain output is functionally equivalent and can be used interchangeably in most circuit topologies.

Q: Is FOD260L compatible with 4.5V supply voltage? A: Yes. FOD260L supports a supply voltage range of 3V ~ 5.5V, which includes the 4.5V ~ 5.5V range of the HCPL-2611. FOD260L is fully compatible with existing power supply designs.

Q: Can I use HCPL2611M or VO2611 in applications requiring -40°C ~ 85°C operation? A: Yes. Both HCPL2611M and VO2611 support extended operating temperature ranges (-40°C ~ 100°C), which exceed the HCPL-2611 specification of -40°C ~ 85°C. They are fully compatible with this temperature range.

Q: Why should I choose HCPL-2611-000E over other substitutes? A: HCPL-2611-000E is the direct Broadcom equivalent with identical electrical specifications, packaging, and pinout. It requires no design verification and provides the lowest risk for drop-in replacement. It is ROHS3 compliant and maintains full backward compatibility.

Q: Are all substitute parts available in 8-DIP through-hole packaging? A: Yes. All listed substitutes use the 8-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical and PCB assembly compatibility with the HCPL-2611.

Q: What is the significance of CMTI rating in optoisolator selection? A: CMTI (Common Mode Transient Immunity) specifies the maximum rate of voltage change on the isolated side that the device can tolerate without false triggering. Higher CMTI ratings provide better noise immunity in high-speed switching environments. FOD260L offers 25kV/µs, the highest among all listed parts.