HCPL-7601 Equivalent & Substitute Parts

Part Overview

The HCPL-7601 is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. It features a 3750Vrms isolation voltage, open collector output with Schottky clamping, and supports data rates up to 10MBd with 1kV/µs common mode transient immunity. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new designs requiring similar isolation performance.

Substiute Parts

HCPL-7601

Broadcom LimitedIn Stock: 12913HCPL-7601 Datasheet

Current PartRFQ

HCPL-261A

Broadcom LimitedIn Stock: 821HCPL-261A 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-7601 is determined by the following critical parameters:

• Isolation Voltage: Minimum 3750Vrms required for direct substitution
• Output Configuration: Open collector output with Schottky clamping
• Data Rate: 10MBd or higher
• Output Current: 50 mA per channel
• Package: 8-DIP through-hole form factor
• Supply Voltage: 4.5V ~ 5.5V compatibility
• Operating Temperature Range: -40°C ~ 85°C

The substitute parts identified fall into two categories based on isolation voltage specifications:

Category A - Full Voltage Equivalents (3750Vrms):

• HCPL-261A (Broadcom Limited, Active status)

Category B - Reduced Voltage Alternatives (2500Vrms):

• HCPL2601 (onsemi, Obsolete status)
• HCPL2611 (onsemi, Obsolete status)

Category A provides direct electrical equivalence with maintained isolation voltage. Category B parts operate at lower isolation voltage but retain compatible output characteristics, data rate, and package specifications.

Parameter Comparison

Engineering Selection Recommendations

HCPL-261A is the primary recommended substitute. It is manufactured by Broadcom Limited with active product status, ensuring ongoing availability and support. It maintains identical isolation voltage (3750Vrms), output configuration, current rating, and supply voltage specifications as the HCPL-7601. The propagation delay specification is slightly relaxed (100ns versus 75ns), which is acceptable for most applications. RoHS compliance status remains unchanged from the original part.

HCPL2601 and HCPL2611 are secondary alternatives suitable only for applications where the reduced isolation voltage of 2500Vrms is acceptable. Both parts are obsolete, limiting long-term availability. HCPL2611 provides superior common mode transient immunity (10kV/µs) compared to the original part. Both onsemi parts achieve ROHS3 compliance, representing an environmental advantage over the original Broadcom part. These alternatives are appropriate for cost-sensitive designs or where enhanced CMTI performance is beneficial within the lower isolation voltage constraint.

Frequently Asked Questions (FAQ)

Q: Can HCPL-261A be used as a direct replacement for HCPL-7601?

A: Yes. HCPL-261A maintains the same isolation voltage (3750Vrms), output type (open collector with Schottky clamping), current rating (50 mA), data rate (10MBd), supply voltage range (4.5V ~ 5.5V), and package format (8-DIP). The propagation delay specification is slightly higher (100ns maximum versus 75ns), which does not affect functionality in standard digital isolation applications.

Q: What is the key difference between HCPL-261A and the onsemi alternatives?

A: HCPL-261A maintains the 3750Vrms isolation voltage of the original HCPL-7601. HCPL2601 and HCPL2611 operate at 2500Vrms isolation voltage. Selection depends on the isolation voltage requirement of the application. If 2500Vrms isolation is sufficient, the onsemi parts offer ROHS3 compliance and enhanced common mode transient immunity.

Q: Are the onsemi parts (HCPL2601, HCPL2611) suitable replacements?

A: HCPL2601 and HCPL2611 are suitable only if the application can tolerate reduced isolation voltage (2500Vrms instead of 3750Vrms). Both parts are obsolete, presenting potential supply chain constraints. They maintain compatible output current (50 mA), data rate (10Mbps), package format (8-DIP), and operating temperature range. HCPL2611 provides higher common mode transient immunity (10kV/µs) than the original part.

Q: Does package compatibility exist across all substitute parts?

A: Yes. All substitute parts use the 8-DIP (0.300", 7.62mm) through-hole package, ensuring direct mechanical and electrical pin compatibility with the HCPL-7601 in existing PCB layouts.

Q: What compliance considerations apply to substitution?

A: HCPL-261A maintains RoHS non-compliant status matching the original part. HCPL2601 and HCPL2611 are ROHS3 compliant. All parts are REACH unaffected and classified under ECCN EAR99. Selection should account for system-level compliance requirements.