HCPL-2601 Equivalent & Substitute Parts

Part Overview

The HCPL-2601 is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. It provides 3750Vrms isolation with open collector, Schottky clamped output, supporting 10MBd data rates and 10kV/µs common mode transient immunity. The part is currently active in production with 25,200 units in stock. Equivalent and substitute parts are necessary when addressing supply constraints, obsolescence concerns, or when alternative manufacturers' specifications meet application requirements within the allowed parameter ranges.

Substiute Parts

HCPL-2601

Broadcom LimitedIn Stock: 25229HCPL-2601 Datasheet

Current PartRFQ

HCPL-2601-000E

Broadcom LimitedIn Stock: 17878HCPL-2601-000E Datasheet

MFR RecommendedRFQ

HCPL2601

onsemiIn Stock: 2352HCPL2601 Datasheet

DirectRFQ

HCPL2611M

onsemiIn Stock: 12713HCPL2611M Datasheet

DirectRFQ

FOD260L

Fairchild SemiconductorIn Stock: 5728FOD260L Datasheet

MFR RecommendedRFQ

VO2601

Vishay Semiconductor Opto DivisionIn Stock: 1668VO2601 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-2601 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Package / Case: 8-DIP (0.300", 7.62mm) — all substitutes must match this form factor
• Mounting Type: Through Hole — mechanical compatibility requirement
• Number of Channels: 1 — functional requirement
• Input Type: DC — signal type compatibility
• Voltage - Supply: 4.5V ~ 5.5V — power supply compatibility
• Output Type: Open Collector or Open Drain — logic interface compatibility

Performance Parameters Allowing Substitution:

• Voltage - Isolation: 3750Vrms or higher — substitutes with equal or greater isolation voltage are acceptable
• Common Mode Transient Immunity: 10kV/µs or higher — substitutes meeting or exceeding this specification are acceptable
• Data Rate: 10MBd or higher — substitutes with equal or greater bandwidth are acceptable
• Current - Output / Channel: 50 mA or higher — substitutes with equal or greater output current are acceptable
• Operating Temperature: -40°C to 85°C or wider range — substitutes with equal or extended temperature range are acceptable

Substitutes may vary in propagation delay, rise/fall time, and forward voltage within the constraints of the application's timing and power requirements, provided the part meets the mandatory compatibility parameters.

Parameter Comparison

Engineering Selection Recommendations

HCPL-2601-000E (Broadcom Limited) This is the manufacturer-recommended equivalent part number. It maintains identical electrical specifications to the HCPL-2601 while offering ROHS3 compliance, addressing environmental and regulatory requirements. Product status is active with 17,800 units in stock. This part is the preferred direct replacement when RoHS compliance is required.

HCPL2611M (onsemi) This part exceeds the isolation voltage specification (5000Vrms vs. 3750Vrms) and maintains the 10kV/µs CMTI requirement. It is active in production with 12,620 units available. The extended operating temperature range (-40°C to 100°C) provides additional thermal margin. ROHS3 compliance is confirmed. This substitute is suitable for applications requiring higher isolation voltage or extended temperature operation.

FOD260L (Fairchild Semiconductor) This part provides the highest common mode transient immunity (25kV/µs) and exceeds isolation voltage (5000Vrms). It features Schottky clamped output matching the original design. The supply voltage range extends to 3V, offering broader compatibility. Product status is active with 5,630 units in stock. This substitute is appropriate for applications with stringent noise immunity requirements.

VO2601 (Vishay Semiconductor Opto Division) This part exceeds isolation voltage (5300Vrms) and features open drain output instead of open collector. It maintains 10MBd data rate and 50 mA output current. Extended operating temperature range (-40°C to 100°C) is provided. ROHS3 compliance is confirmed with 1,590 units in stock. This substitute is suitable when open drain output topology is compatible with the application circuit.

HCPL2601 (onsemi) This part has lower isolation voltage (2500Vrms) and reduced CMTI (5kV/µs), making it unsuitable as a direct substitute for the HCPL-2601. Product status is obsolete. This part should not be selected for new designs or replacements.

Frequently Asked Questions (FAQ)

Q: Can HCPL2601 (onsemi) be used as a substitute for HCPL-2601? A: No. The onsemi HCPL2601 has lower isolation voltage (2500Vrms vs. 3750Vrms) and reduced common mode transient immunity (5kV/µs vs. 10kV/µs). Additionally, the product status is obsolete. This part does not meet the minimum performance requirements for substitution.

Q: What is the difference between open collector and open drain output types? A: Both are logic output configurations that require external pull-up resistors. Open collector uses a bipolar transistor output stage, while open drain uses a MOSFET output stage. Both are functionally compatible in most applications, though open drain typically offers faster switching characteristics. The VO2601 uses open drain output and is compatible with circuits designed for open collector operation.

Q: Is HCPL-2601-000E a direct replacement for HCPL-2601? A: Yes. HCPL-2601-000E is the manufacturer-recommended equivalent with identical electrical specifications. The primary difference is ROHS3 compliance. It is the preferred choice when regulatory compliance is required.

Q: Which substitute part offers the best noise immunity? A: FOD260L provides the highest common mode transient immunity at 25kV/µs, compared to 10kV/µs for the original HCPL-2601. This makes it suitable for applications with high-speed switching noise or harsh electromagnetic environments.

Q: Can I use HCPL2611M in place of HCPL-2601 if my application requires higher isolation voltage? A: Yes. HCPL2611M exceeds the isolation voltage requirement (5000Vrms vs. 3750Vrms) and maintains the 10kV/µs CMTI specification. It is active in production and ROHS3 compliant. The extended operating temperature range provides additional design margin.

Q: Are all substitute parts available in the same 8-DIP package? A: Yes. All substitute parts listed are packaged in 8-DIP (0.300", 7.62mm) through-hole format, ensuring mechanical and pin compatibility with the original HCPL-2601.

Q: What is the impact of different propagation delays on circuit design? A: Propagation delay affects timing margins in digital isolation circuits. The HCPL-2601 specifies 100ns maximum for both rising and falling edges. Substitutes with lower propagation delays (such as FOD260L at 90ns/75ns) provide faster response times and may improve system performance. Substitutes with equal or slightly higher delays remain compatible if timing budgets accommodate the variation.

Q: Does RoHS compliance affect electrical performance? A: No. RoHS compliance relates to material composition and environmental standards, not electrical performance. HCPL-2601-000E, HCPL2611M, VO2601, and HCPL2601 (onsemi) are all ROHS3 compliant and maintain their specified electrical characteristics.