HCPL2601SD Equivalent & Substitute Parts

Part Overview

The HCPL2601SD is a logic output optoisolator manufactured by onsemi, featuring 2500Vrms isolation voltage, open collector output, and 10Mbps data rate in an 8-SMD package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across isolation voltage, output type, data rate, and package form factor while meeting current product availability and compliance standards.

Key Parameters

Parameter	HCPL2601SD
Manufacturer	onsemi
Number of Channels	1
Voltage - Isolation	2500Vrms
Output Type	Open Collector
Data Rate	10Mbps
Current - Output / Channel	50 mA
Common Mode Transient Immunity (Min)	5kV/µs
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SMD, Gull Wing
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Isolation Voltage: Substitute parts must provide equal or greater isolation voltage (minimum 2500Vrms)
Output Type: Must be open collector configuration
Data Rate: Must support minimum 10Mbps operation
Current Output: Must support minimum 50 mA per channel
Package Form Factor: 8-SMD, Gull Wing preferred; 8-DIP Gull Wing acceptable with design review
Supply Voltage Compatibility: Must operate within or encompass 4.5V ~ 5.5V range
Operating Temperature Range: Must cover -40°C ~ 85°C minimum
Compliance: ROHS3 compliance required

Substitute parts are grouped into two categories:

Category A - Direct SMD Substitutes (Preferred) Parts maintaining 8-SMD package form factor with equal or superior isolation voltage and open collector output.

Category B - DIP Package Alternatives Parts with 8-DIP Gull Wing package offering higher isolation voltage and enhanced performance characteristics, suitable where package transition is feasible.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	Output Type	Data Rate	Current Output	CMTI (Min)	Supply Voltage	Package	Product Status	Packaging Type
HCPL2601SD	onsemi	2500Vrms	Open Collector	10Mbps	50 mA	5kV/µs	4.5V ~ 5.5V	8-SMD, Gull Wing	Obsolete	Cut Tape (CT)
6N137SMT&R	Isocom Components 2004 LTD	5000Vrms	Open Collector	10Mbps	50 mA	5kV/µs	7V	8-SMD, Gull Wing	Active	Tape & Reel (TR)
HCPL-260L-300E	Broadcom Limited	3750Vrms	Open Collector, Schottky Clamped	15MBd	50 mA	10kV/µs	2.7V ~ 3.6V, 4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Tube
HCPL-260L-320E	Broadcom Limited	5000Vrms	Open Collector, Schottky Clamped	15MBd	50 mA	10kV/µs	2.7V ~ 3.6V, 4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Tube
HCPL-260L-500E	Broadcom Limited	3750Vrms	Open Collector, Schottky Clamped	15MBd	50 mA	10kV/µs	2.7V ~ 3.6V, 4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Cut Tape (CT) & Digi-Reel®
HCPL-260L-520E	Broadcom Limited	5000Vrms	Open Collector, Schottky Clamped	15MBd	50 mA	10kV/µs	2.7V ~ 3.6V, 4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Tape & Reel (TR)
HCPL-260L-560E	Broadcom Limited	3750Vrms	Open Collector, Schottky Clamped	15MBd	50 mA	10kV/µs	2.7V ~ 3.6V, 4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Tape & Reel (TR)
HCPL-2602-300E	Broadcom Limited	3750Vrms	Line Receiver	N/A	50mA	1kV/µs	4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Tube
HCPL-2602-500E	Broadcom Limited	3750Vrms	Line Receiver	N/A	50mA	1kV/µs	4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Tape & Reel (TR)
HCPL-2612-300E	Broadcom Limited	3750Vrms	Line Receiver	N/A	50mA	4.6kV/µs	4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Tube
HCPL-2612-500E	Broadcom Limited	3750Vrms	Line Receiver	N/A	50mA	4.6kV/µs	4.5V ~ 5.5V	8-SMD, Gull Wing	Active	Tape & Reel (TR)

Engineering Selection Recommendations

Primary Substitutes (Open Collector Logic Output)

The 6N137SMT&R from Isocom Components 2004 LTD is the closest functional equivalent, maintaining 8-SMD package form factor, open collector output, 10Mbps data rate, and 50 mA output current. It provides doubled isolation voltage (5000Vrms vs. 2500Vrms) and identical CMTI rating. Supply voltage operates at 7V, which requires circuit verification for compatibility with 4.5V ~ 5.5V systems. Product status is active with current availability.

The HCPL-260L series from Broadcom Limited (HCPL-260L-300E, HCPL-260L-320E, HCPL-260L-500E, HCPL-260L-520E, HCPL-260L-560E) provides enhanced performance with 15MBd data rate, superior CMTI (10kV/µs), and Schottky clamped output. Isolation voltage options range from 3750Vrms to 5000Vrms. Dual supply voltage support (2.7V ~ 3.6V and 4.5V ~ 5.5V) ensures compatibility. All variants are active products with established supply chains.

Secondary Alternatives (Line Receiver Output)

The HCPL-2602 and HCPL-2612 series from Broadcom Limited feature line receiver output topology rather than logic output. These parts are not direct functional equivalents due to different output type and reduced CMTI specifications. Selection of these alternatives requires functional circuit redesign and is not recommended for direct substitution.

Compliance and Availability

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). All are rated for -40°C ~ 85°C operating temperature range. Active product status ensures ongoing availability and supply chain stability compared to the obsolete HCPL2601SD.

Frequently Asked Questions (FAQ)

Q: Can 6N137SMT&R directly replace HCPL2601SD in existing designs?

A: The 6N137SMT&R maintains functional compatibility for isolation voltage, output type, data rate, and current rating. However, supply voltage differs (7V vs. 4.5V ~ 5.5V). Circuit verification is required to confirm compatibility with existing power supply architecture before implementation.

Q: What is the primary advantage of HCPL-260L series over HCPL2601SD?

A: The HCPL-260L series offers higher data rate (15MBd vs. 10Mbps), superior common mode transient immunity (10kV/µs vs. 5kV/µs), and dual supply voltage support. Isolation voltage options accommodate both 3750Vrms and 5000Vrms requirements. All variants are active products with established supply availability.

Q: Are HCPL-2602 and HCPL-2612 suitable replacements?

A: These parts feature line receiver output topology, not logic output. They are not direct functional equivalents and require circuit redesign. Selection is not recommended for direct substitution of HCPL2601SD.

Q: Does package form factor affect substitution eligibility?

A: The HCPL2601SD uses 8-SMD, Gull Wing package. All recommended substitutes maintain this package form factor, ensuring mechanical and electrical compatibility without PCB redesign. Packaging type (Cut Tape, Tape & Reel, Tube) affects procurement and handling but not functional performance.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts listed maintain ROHS3 compliance, REACH unaffected status, and EAR99 export classification. Moisture sensitivity level is MSL 1 (unlimited) across all alternatives, matching the original HCPL2601SD specification.

Q: Which substitute offers the best isolation voltage margin?

A: The 6N137SMT&R and HCPL-260L-320E and HCPL-260L-520E provide 5000Vrms isolation, doubling the original 2500Vrms specification. This provides maximum isolation margin for high-voltage applications. HCPL-260L-300E, HCPL-260L-500E, and HCPL-260L-560E provide 3750Vrms, offering 1.5x isolation improvement.

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