HCPL-7611 Equivalent & Substitute Parts

Part Overview

The HCPL-7611 is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. This component features a 3750Vrms isolation voltage rating, open collector Schottky clamped output, and supports data rates up to 10MBd with a common mode transient immunity of 10kV/µs. The HCPL-7611 is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

HCPL-7611

Broadcom LimitedIn Stock: 1981HCPL-7611 Datasheet

Current PartRFQ

HCPL-2601

Broadcom LimitedIn Stock: 25229HCPL-2601 Datasheet

MFR RecommendedRFQ

HCPL2601

onsemiIn Stock: 2352HCPL2601 Datasheet

MFR RecommendedRFQ

HCPL2611

onsemiIn Stock: 2165HCPL2611 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL-7611 is determined by the following critical parameters:

Primary Substitution Criteria:

• Number of channels: 1 channel required
• Output configuration: Open collector output with Schottky clamping
• Isolation voltage: Minimum 3750Vrms
• Common mode transient immunity: Minimum 10kV/µs
• Data rate: Minimum 10MBd
• Package type: 8-DIP through-hole mounting
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C

The HCPL-2601 (Broadcom Limited) meets all primary criteria with identical isolation voltage and CMTI specifications. The onsemi variants HCPL2601 and HCPL2611 provide functional alternatives with reduced isolation voltage (2500Vrms) and CMTI specifications (5kV/µs for HCPL2601, 10kV/µs for HCPL2611), representing trade-offs in isolation performance while maintaining core digital isolation functionality.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: HCPL-2601 (Broadcom Limited)

The HCPL-2601 from Broadcom Limited is the direct functional equivalent of the HCPL-7611. Both components share identical isolation voltage (3750Vrms), common mode transient immunity (10kV/µs), output configuration, and supply voltage specifications. The HCPL-2601 maintains active product status, ensuring long-term availability and supply chain continuity. Both components carry RoHS non-compliant status. The HCPL-2601 exhibits slightly higher propagation delay (100ns versus 75ns), which remains within acceptable parameters for most digital isolation applications operating at 10MBd data rates.

Secondary Alternatives: HCPL2611 (onsemi)

The HCPL2611 from onsemi provides an alternative with reduced isolation voltage (2500Vrms) but maintains the 10kV/µs common mode transient immunity specification. This component is suitable for applications where the lower isolation voltage rating is acceptable. The HCPL2611 carries ROHS3 compliance, offering environmental regulatory advantages over the primary recommendation. Product status is obsolete.

Not Recommended: HCPL2601 (onsemi)

The onsemi HCPL2601 variant features reduced isolation voltage (2500Vrms) and common mode transient immunity (5kV/µs), representing significant performance degradation from the HCPL-7611 specification. This component is suitable only for applications with lower isolation and transient immunity requirements.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-2601 (Broadcom) directly replace the HCPL-7611 in existing designs?

A: Yes. The HCPL-2601 from Broadcom Limited shares identical electrical specifications for isolation voltage, common mode transient immunity, output type, supply voltage, and operating temperature range. Pin configuration and package dimensions are identical (8-DIP). The slightly increased propagation delay (100ns maximum versus 75ns) does not affect functionality in standard digital isolation applications.

Q: What is the key difference between the Broadcom HCPL-2601 and onsemi HCPL2601?

A: The Broadcom HCPL-2601 maintains the 3750Vrms isolation voltage and 10kV/µs CMTI of the original HCPL-7611. The onsemi HCPL2601 reduces isolation voltage to 2500Vrms and CMTI to 5kV/µs. Selection depends on application isolation and transient immunity requirements.

Q: Why does the HCPL-2601 (Broadcom) show higher propagation delay than the HCPL-7611?

A: Propagation delay specifications vary between product revisions and manufacturing processes. The HCPL-2601 maximum delay of 100ns remains well within the 10MBd data rate capability. Applications sensitive to timing margins should evaluate this parameter against system requirements.

Q: Are there RoHS compliance considerations for substitution?

A: The HCPL-7611 and Broadcom HCPL-2601 are both RoHS non-compliant. The onsemi variants (HCPL2601 and HCPL2611) carry ROHS3 compliance. For applications requiring RoHS compliance, the onsemi alternatives provide regulatory alignment, though with reduced isolation specifications.

Q: Can the onsemi HCPL2611 replace the HCPL-7611 in high-speed isolation applications?

A: The HCPL2611 maintains 10kV/µs common mode transient immunity but reduces isolation voltage to 2500Vrms. Substitution is valid only if the application isolation voltage requirement is 2500Vrms or lower. The 8-DIP package and pin configuration are compatible.

Q: What packaging formats are available for these optoisolators?

A: All listed components are supplied in 8-DIP (0.300", 7.62mm) through-hole packages. The Broadcom HCPL-2601 is available in tube packaging. Packaging format should be confirmed during procurement to ensure compatibility with assembly processes.