HCPL-261N-020E Equivalent & Substitute Parts

Part Overview

The HCPL-261N-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 and widely available with 825 pieces in stock.

Substitute parts are necessary when the HCPL-261N-020E becomes unavailable, when alternative sourcing is required for supply chain resilience, or when design flexibility permits selection from equivalent alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

HCPL-261N-020E

Broadcom LimitedIn Stock: 868HCPL-261N-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-261N-020E is determined by the following critical parameters:

Mandatory Matching Parameters:

• Package / Case: 8-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Number of Channels: 1
• Output Type: Open Collector configuration
• Input Type: DC
• Operating Temperature Range: -40°C ~ 85°C minimum
• Voltage - Isolation: 5000Vrms or higher
• Data Rate: 10Mbps or higher
• Current - Output / Channel: 50 mA or higher

Allowable Parameter Variations:

• Common Mode Transient Immunity: May exceed 1kV/µs (higher values are acceptable)
• Propagation Delay: May be equal to or faster than specified maximums
• Rise / Fall Time: May be faster than specified values
• Voltage - Supply: May support wider range (3V minimum acceptable if 5.5V maximum is met)
• Current - DC Forward (If): May exceed 10mA maximum

The substitute parts FOD260L, HCPL2601, and HCPL2611 meet these criteria with variations in performance characteristics that do not compromise functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

FOD260L (Fairchild Semiconductor): This part is functionally equivalent with superior performance characteristics. It maintains 5000Vrms isolation matching the main part, offers faster propagation delay (90ns/75ns vs. 100ns/100ns), and provides 25kV/µs common mode transient immunity. The wider supply voltage range (3V ~ 5.5V) provides additional design flexibility. Product status is active with 5630 units in stock, ensuring availability. Compliance certifications match the main part (ECCN: EAR99, HTSUS: 8541.49.8000).

HCPL2601 (onsemi): This part is electrically compatible but operates at reduced isolation voltage (2500Vrms vs. 5000Vrms). It is marked as obsolete, indicating discontinued production status. Use only when isolation voltage reduction is acceptable for the application. RoHS3 compliance and temperature range match the main part. Inventory availability is 2242 units.

HCPL2611 (onsemi): This part is electrically compatible but operates at reduced isolation voltage (2500Vrms vs. 5000Vrms). It is marked as obsolete. The 10kV/µs common mode transient immunity exceeds the main part specification. Use only when isolation voltage reduction is acceptable for the application. RoHS3 compliance and temperature range match the main part. Inventory availability is 2092 units.

For applications requiring 5000Vrms isolation with active product status, FOD260L is the primary substitute. For applications where 2500Vrms isolation is sufficient, HCPL2601 or HCPL2611 are available alternatives, with the understanding that these parts are obsolete.

Frequently Asked Questions (FAQ)

Q: Can FOD260L replace HCPL-261N-020E in all applications? A: FOD260L is functionally compatible as a direct substitute. It maintains the same 5000Vrms isolation voltage, 8-DIP package, 50mA output current, and 10Mbps data rate. Performance characteristics are equal or superior (faster propagation delay, higher CMTI). No circuit modifications are required.

Q: What is the key difference between HCPL2601 and HCPL2611? A: Both parts are onsemi optoisolators with identical electrical specifications except for Common Mode Transient Immunity. HCPL2601 specifies 5kV/µs CMTI, while HCPL2611 specifies 10kV/µs CMTI. Both operate at 2500Vrms isolation voltage, which is lower than the main part.

Q: Why are HCPL2601 and HCPL2611 marked as obsolete? A: Obsolete status indicates these parts are no longer in active production by the manufacturer. While inventory may be available from distributors, long-term sourcing cannot be guaranteed. These parts should be used only when isolation voltage reduction is acceptable and FOD260L is unavailable.

Q: Is the 8-DIP package pinout identical across all substitute parts? A: All substitute parts use the standard 8-DIP (0.300", 7.62mm) through-hole package. Pinout compatibility must be verified against individual datasheets, as package designation alone does not guarantee identical pin assignments.

Q: Can HCPL2601 or HCPL2611 be used in applications requiring 5000Vrms isolation? A: No. These parts are rated for 2500Vrms isolation only. Using them in applications requiring 5000Vrms isolation violates the electrical specifications and creates safety and reliability risks.

Q: What is the significance of the wider supply voltage range in FOD260L (3V ~ 5.5V)? A: FOD260L accepts supply voltages as low as 3V, compared to 4.5V minimum for the main part. This provides design flexibility for lower-voltage applications. However, if the main part is already specified at 4.5V ~ 5.5V, this additional range is not a functional requirement.

Q: Are all substitute parts RoHS3 compliant? A: FOD260L compliance status is not specified in the provided data. HCPL2601 and HCPL2611 are both ROHS3 compliant. Verify RoHS compliance requirements with the FOD260L manufacturer datasheet if regulatory compliance is mandatory.