HCPL-261A-020E Equivalent & Substitute Parts

Part Overview

The HCPL-261A-020E is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. This 5000Vrms isolation device features open collector output with Schottky clamping, operating at 10MBd data rate with 1kV/µs common mode transient immunity. The part is currently active in production with 943 units in stock.

Substitute parts are necessary when the HCPL-261A-020E becomes unavailable, when alternative packaging or lead times are required, or when system design requires different isolation voltage ratings or CMTI specifications while maintaining functional compatibility.

Substiute Parts

HCPL-261A-020E

Broadcom LimitedIn Stock: 997HCPL-261A-020E Datasheet

Current PartRFQ

FOD260L

Fairchild SemiconductorIn Stock: 5728FOD260L Datasheet

MFR RecommendedRFQ

HCPL2601

onsemiIn Stock: 2352HCPL2601 Datasheet

MFR RecommendedRFQ

HCPL2611

onsemiIn Stock: 2165HCPL2611 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-261A-020E is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Number of Channels: 1
• Output Type: Open Collector, Schottky Clamped
• Current - Output / Channel: 50 mA
• Package / Case: 8-DIP (0.300", 7.62mm)
• Input Type: DC
• Operating Temperature: -40°C ~ 85°C
• Data Rate: 10MBd or 10Mbps

Allowable Variation Parameters:

• Voltage - Isolation: 2500Vrms or higher (HCPL-261A-020E operates at 5000Vrms; lower ratings acceptable for applications not requiring maximum isolation)
• Common Mode Transient Immunity (Min): 1kV/µs or higher (HCPL-261A-020E operates at 1kV/µs; higher CMTI provides enhanced performance margin)
• Propagation Delay: Variations acceptable within typical application tolerances
• Voltage - Supply: 3V ~ 5.5V range (HCPL-261A-020E operates at 4.5V ~ 5.5V; wider supply range acceptable)
• Product Status: Active or Obsolete (both acceptable for substitution purposes)

Parameter Comparison

Engineering Selection Recommendations

FOD260L (Fairchild Semiconductor) is the primary active substitute. It maintains 5000Vrms isolation matching the main part, features superior CMTI performance at 25kV/µs, and delivers faster propagation delays (90ns/75ns vs. 100ns/100ns). The wider supply voltage range (3V ~ 5.5V) provides additional design flexibility. This part is currently active in production with 5630 units in stock.

HCPL2601 (onsemi) is an active substitute with reduced isolation voltage (2500Vrms) and lower CMTI (5kV/µs). This part is obsolete but remains available with 2242 units in stock. Selection is appropriate for applications where 2500Vrms isolation is sufficient and lower CMTI requirements are acceptable.

HCPL2611 (onsemi) is an active substitute with reduced isolation voltage (2500Vrms) but enhanced CMTI performance (10kV/µs). This part is obsolete but remains available with 2092 units in stock. Selection is appropriate for applications requiring higher CMTI than the main part but tolerating lower isolation voltage.

For new designs, FOD260L is recommended due to active product status and superior electrical performance. For legacy system maintenance or applications with specific isolation voltage requirements, HCPL2601 or HCPL2611 provide functional alternatives within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can FOD260L directly replace HCPL-261A-020E in existing designs?

A: Yes. FOD260L maintains identical package (8-DIP), channel count (1), output type (Open Collector, Schottky Clamped), output current (50 mA), data rate (10MBd/Mbps), and operating temperature range (-40°C ~ 85°C). The 5000Vrms isolation voltage is identical. Superior CMTI (25kV/µs vs. 1kV/µs) and faster propagation delays provide performance margin. The wider supply voltage range (3V ~ 5.5V) accommodates the main part's 4.5V ~ 5.5V requirement.

Q: What is the key difference between FOD260L and HCPL2601/HCPL2611?

A: FOD260L maintains 5000Vrms isolation voltage matching the HCPL-261A-020E. HCPL2601 and HCPL2611 both operate at 2500Vrms isolation voltage. HCPL2611 provides higher CMTI (10kV/µs) than HCPL2601 (5kV/µs). Both onsemi parts are obsolete; FOD260L is active.

Q: Can HCPL2601 or HCPL2611 be used in applications requiring 5000Vrms isolation?

A: No. These parts are rated for 2500Vrms isolation only. Applications requiring 5000Vrms isolation must use FOD260L or the original HCPL-261A-020E.

Q: Are all substitute parts ROHS3 compliant?

A: HCPL-261A-020E, HCPL2601, and HCPL2611 are ROHS3 compliant. FOD260L compliance status is not specified in the provided data.

Q: What is the impact of different CMTI ratings on substitution?

A: CMTI (Common Mode Transient Immunity) determines the maximum rate of voltage change the optoisolator can tolerate without false triggering. HCPL-261A-020E operates at 1kV/µs minimum. FOD260L (25kV/µs), HCPL2611 (10kV/µs), and HCPL2601 (5kV/µs) all exceed this requirement, providing enhanced noise immunity. Higher CMTI is always acceptable for substitution.

Q: Are propagation delay differences significant for substitution?

A: Propagation delays vary among substitutes: HCPL-261A-020E (100ns/100ns), FOD260L (90ns/75ns), HCPL2601 (75ns/75ns), HCPL2611 (75ns/75ns). All operate at 10MBd/Mbps data rate. Faster propagation delays provide timing margin and are acceptable for substitution in applications designed for the main part's specifications.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes, all substitute parts use identical 8-DIP (0.300", 7.62mm) package. Pin-to-pin compatibility is maintained across all listed parts. No PCB layout modifications are required for substitution.