HCPL-260L-520 Optoisolator Equivalent & Substitute Parts

Part Overview

The HCPL-260L-520 is a logic output optoisolator manufactured by Broadcom Limited, featuring 5000Vrms isolation voltage, open collector Schottky clamped output, and 15MBd data rate capability. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs. The part operates across -40°C to 85°C and supports dual supply voltage ranges (2.7V–3.6V and 4.5V–5.5V), making it suitable for industrial isolation applications requiring high common mode transient immunity.

Substiute Parts

HCPL-260L-520

Broadcom LimitedIn Stock: 968HCPL-260L-520 Datasheet

Current PartRFQ

HCPL-260L-520E

Broadcom LimitedIn Stock: 882HCPL-260L-520E Datasheet

DirectRFQ

FOD260LS

onsemiIn Stock: 1375FOD260LS Datasheet

MFR RecommendedRFQ

FOD260LSD

onsemiIn Stock: 1463FOD260LSD Datasheet

MFR RecommendedRFQ

HCPL2601SD

onsemiIn Stock: 23190HCPL2601SD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL-260L-520 is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage isolation rating: 5000Vrms minimum
• Output configuration: Open collector with Schottky clamping
• Number of channels: 1
• Output current capability: 50 mA minimum
• Operating temperature range: -40°C to 85°C
• Package type: 8-SMD, Gull Wing

Secondary Compatibility Factors:

• Data rate: 15MBd or higher preferred; 10Mbps acceptable with timing margin verification
• Common mode transient immunity: 10kV/µs or higher
• Supply voltage compatibility: Overlap with 2.7V–3.6V or 4.5V–5.5V ranges
• Propagation delay: Maximum 75ns for tpLH and tpHL

Substitutes are grouped into two categories: direct equivalents (identical isolation voltage and CMTI) and functional alternatives (reduced isolation voltage or CMTI with equivalent electrical performance in lower-stress applications).

Parameter Comparison

Engineering Selection Recommendations

Tier 1 - Direct Equivalent (Recommended Primary Substitute):

HCPL-260L-520E is the optimal replacement for HCPL-260L-520. Both parts share identical electrical specifications including 5000Vrms isolation, 10kV/µs CMTI, 15MBd data rate, and dual supply voltage ranges. HCPL-260L-520E is currently active with ROHS3 compliance and available in Tape & Reel packaging, addressing the discontinuation of the original part while maintaining full functional compatibility.

Tier 2 - Enhanced Performance Alternatives (onsemi FOD260 Series):

FOD260LS and FOD260LSD are functionally equivalent onsemi alternatives with superior common mode transient immunity (25kV/µs versus 10kV/µs). Both maintain 5000Vrms isolation and 50mA output current. The reduced data rate specification (10Mbps versus 15MBd) is acceptable for applications not requiring maximum bandwidth. FOD260LSD in Tape & Reel packaging is preferred for production volumes; FOD260LS in Tube packaging suits lower-volume requirements. Both parts carry ROHS3 compliance and active product status.

Tier 3 - Reduced Isolation Alternative (Lower-Stress Applications Only):

HCPL2601SD provides 2500Vrms isolation with 5kV/µs CMTI, suitable only for applications where the original 5000Vrms specification exceeds system requirements. This part is obsolete and should not be selected for new designs. Existing designs using HCPL2601SD may continue operation, but migration to Tier 1 or Tier 2 alternatives is recommended for long-term supply security.

Frequently Asked Questions (FAQ)

Q: Can HCPL-260L-520E be used as a direct drop-in replacement for HCPL-260L-520?

A: Yes. HCPL-260L-520E is electrically and mechanically identical to HCPL-260L-520, differing only in packaging format (Tape & Reel versus bulk) and product status (Active versus Discontinued). No circuit modifications are required.

Q: What is the difference between FOD260LS and FOD260LSD?

A: Both parts are electrically identical. FOD260LS is supplied in Tube packaging; FOD260LSD is supplied in Tape & Reel (TR) packaging. Selection depends on procurement and assembly requirements. Tape & Reel is standard for automated assembly; Tube packaging is suitable for manual or lower-volume operations.

Q: Why does FOD260 series have higher CMTI (25kV/µs) than the original HCPL-260L-520 (10kV/µs)?

A: Higher CMTI indicates superior immunity to rapid voltage transients on the isolation barrier. This is a performance enhancement, not a limitation. Applications designed for 10kV/µs operate safely with 25kV/µs components.

Q: Is HCPL2601SD suitable for new designs?

A: No. HCPL2601SD is obsolete and carries reduced isolation voltage (2500Vrms). New designs must use Tier 1 (HCPL-260L-520E) or Tier 2 (FOD260LS/FOD260LSD) alternatives to ensure long-term supply availability and compliance with current RoHS standards.

Q: What supply voltage range should be verified when substituting?

A: HCPL-260L-520 and HCPL-260L-520E support 2.7V–3.6V and 4.5V–5.5V. FOD260 series supports 3V–5.5V (narrower low-voltage range). HCPL2601SD supports only 4.5V–5.5V. Verify system supply voltages fall within the selected substitute's rated range.

Q: Are all substitutes RoHS compliant?

A: HCPL-260L-520E, FOD260LS, FOD260LSD, and HCPL2601SD are all ROHS3 compliant. The original HCPL-260L-520 is RoHS non-compliant. Substitution improves regulatory compliance for new production.

Q: What is the impact of reduced data rate (10Mbps in FOD260 versus 15MBd in HCPL-260L-520)?

A: Data rate reduction does not affect applications operating below 10Mbps. For applications requiring 15MBd operation, HCPL-260L-520E maintains the original specification. FOD260 series is suitable for standard industrial isolation applications operating at 10Mbps or lower.