HCPL-261N-300E Equivalent & Substitute Parts

Part Overview

The HCPL-261N-300E is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. This device provides 3750Vrms isolation with open collector, Schottky clamped output configuration, supporting data rates up to 10MBd. The part is currently in active production status with 937 units in stock. Substitute parts are necessary when addressing specific application requirements such as higher isolation voltage ratings, improved common mode transient immunity, alternative output configurations, or when managing component availability across supply chains.

Substiute Parts

HCPL-261N-300E

Broadcom LimitedIn Stock: 950HCPL-261N-300E Datasheet

Current PartRFQ

ACPL-C61L-000E

Broadcom LimitedIn Stock: 6836ACPL-C61L-000E Datasheet

MFR RecommendedRFQ

ACPL-W61L-000E

Broadcom LimitedIn Stock: 87471ACPL-W61L-000E Datasheet

MFR RecommendedRFQ

HCPL2601SD

onsemiIn Stock: 23190HCPL2601SD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL-261N-300E is determined by the following critical parameters:

• Isolation Voltage Rating: Minimum 3750Vrms required for direct substitution; higher ratings (5000Vrms) provide enhanced margin
• Data Rate: Must support minimum 10MBd operation
• Output Configuration: Open collector output is the primary requirement; tri-state and push-pull alternatives serve different circuit topologies
• Output Current: Minimum 10 mA required; 50 mA capability preferred for direct replacement
• Supply Voltage Range: Must accommodate 4.5V ~ 5.5V operation or broader range
• Operating Temperature: Minimum -40°C ~ 85°C range required
• Package Compatibility: Surface mount packages (8-SMD, 8-SOIC, 6-SOIC) are interchangeable with PCB layout modifications
• Compliance: ROHS3 compliance and EAR99 classification maintained across all substitutes

Parameter Comparison

Engineering Selection Recommendations

ACPL-C61L-000E (Broadcom Limited): This substitute provides 5000Vrms isolation voltage with tri-state output configuration. It maintains active product status and ROHS3 compliance. The tri-state output requires circuit topology modifications compared to the open collector output of the HCPL-261N-300E. Superior common mode transient immunity (20kV/µs) and extended operating temperature range (-40°C ~ 105°C) are provided. Package change from 8-SMD Gull Wing to 8-SOIC requires PCB layout redesign. Output current is reduced to 10 mA.

ACPL-W61L-000E (Broadcom Limited): This substitute features 5000Vrms isolation with push-pull, totem pole output configuration. Active product status and ROHS3 compliance are maintained. Push-pull output eliminates the need for external pull-up resistors, differing fundamentally from open collector topology. Common mode transient immunity reaches 20kV/µs with extended temperature range (-40°C ~ 105°C). Package change to 6-SOIC (0.180", 4.58mm Width) requires PCB redesign. Output current is 10 mA. Propagation delay is improved to 80ns maximum.

HCPL2601SD (onsemi): This substitute maintains open collector output configuration and 8-SMD Gull Wing package compatibility with the HCPL-261N-300E. However, product status is obsolete, limiting long-term availability. Isolation voltage is reduced to 2500Vrms, which may not meet applications requiring 3750Vrms minimum isolation. Common mode transient immunity is 5kV/µs. Output current capability matches at 50 mA. Operating temperature range matches at -40°C ~ 85°C. ROHS3 compliance is maintained.

Frequently Asked Questions (FAQ)

Q: Can ACPL-C61L-000E directly replace HCPL-261N-300E in existing designs?

A: Direct replacement requires circuit modifications. The tri-state output of ACPL-C61L-000E differs from the open collector, Schottky clamped output of HCPL-261N-300E. PCB layout changes are necessary due to package change from 8-SMD Gull Wing to 8-SOIC. Output current is reduced from 50 mA to 10 mA, requiring load impedance verification.

Q: What are the isolation voltage implications of using HCPL2601SD?

A: HCPL2601SD provides 2500Vrms isolation compared to HCPL-261N-300E at 3750Vrms. Applications requiring minimum 3750Vrms isolation margin cannot use this substitute. The reduced isolation rating may violate safety or regulatory requirements in high-voltage isolation applications.

Q: Which substitute offers the best common mode transient immunity?

A: Both ACPL-C61L-000E and ACPL-W61L-000E provide 20kV/µs common mode transient immunity, compared to 1kV/µs for HCPL-261N-300E. This 20x improvement benefits applications with fast switching transients or high dV/dt environments.

Q: Are all substitutes ROHS3 compliant?

A: Yes. ACPL-C61L-000E, ACPL-W61L-000E, and HCPL2601SD all maintain ROHS3 compliance status, matching the HCPL-261N-300E.

Q: What is the impact of package changes on PCB design?

A: ACPL-C61L-000E requires 8-SOIC (0.154", 3.90mm Width) footprint versus 8-SMD Gull Wing. ACPL-W61L-000E requires 6-SOIC (0.180", 4.58mm Width) footprint. HCPL2601SD maintains 8-SMD Gull Wing compatibility. Package changes necessitate PCB layout redesign and trace routing modifications.

Q: Should HCPL2601SD be selected for new designs?

A: No. HCPL2601SD carries obsolete product status, indicating discontinued manufacturing. New designs should select from active products: ACPL-C61L-000E, ACPL-W61L-000E, or maintain HCPL-261N-300E if available.

Q: How do output current ratings affect circuit design?

A: HCPL-261N-300E and HCPL2601SD provide 50 mA output current. ACPL-C61L-000E and ACPL-W61L-000E provide 10 mA. Lower output current requires higher load impedance or additional buffering stages in applications demanding high current drive capability.