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HCPL2601 Equivalent & Substitute Parts
Part Overview
The HCPL2601 is a logic output optoisolator manufactured by onsemi, featuring 2500Vrms isolation voltage, open collector output configuration, and 10Mbps data rate in an 8-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The HCPL2601 serves applications requiring galvanic isolation in digital signal transmission with moderate isolation voltage requirements and standard data rates.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | HCPL2601 |
| Manufacturer | onsemi |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 2500Vrms |
| Common Mode Transient Immunity (Min) | 5kV/µs |
| Input Type | DC |
| Output Type | Open Collector |
| Current - Output / Channel | 50 mA |
| Data Rate | 10Mbps |
| Propagation Delay tpLH / tpHL (Max) | 75ns / 75ns |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 8-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the HCPL2601 is determined by the following critical parameters:
Primary Compatibility Criteria:
- Package type: 8-DIP (0.300", 7.62mm) through-hole mounting
- Number of channels: 1 channel configuration
- Output type: Open collector topology
- Voltage supply range: 4.5V ~ 5.5V
- Operating temperature range: -40°C ~ 85°C
- Input type: DC input
Secondary Compatibility Criteria:
- Isolation voltage: Minimum 2500Vrms (higher values acceptable)
- Data rate: Minimum 10Mbps (higher values acceptable)
- Propagation delay: Maximum 75ns for tpLH and tpHL (lower values acceptable)
- Output current: Minimum 50mA per channel
Substitute parts are grouped into two categories:
Direct Functional Equivalents (Higher Performance): Parts that maintain identical pinout, package, and supply voltage while offering equal or superior isolation voltage, CMTI, and data rate specifications. These include HCPL-2601 (Broadcom), HCPL-260L, HCPL-260L-000E, and HCPL-260L-020E.
Functional Alternatives (Different Output Type): Parts that share the same package, isolation voltage class, and channel count but employ line receiver output topology instead of open collector. These include HCPL-2602, HCPL-2602-000E, HCPL-2612, and HCPL-2612-000E. These alternatives are suitable only when line receiver functionality is acceptable for the application.
Limited Compatibility Parts: HCPL-261A and HCPL-261A-000E offer open collector output but with reduced CMTI (1kV/µs versus 5kV/µs) and lower forward current specifications, limiting their use to applications with less stringent transient immunity requirements.
Parameter Comparison
| Parameter | HCPL2601 (onsemi) | HCPL-2601 (Broadcom) | HCPL-260L | HCPL-260L-000E | HCPL-260L-020E | HCPL-261A | HCPL-261A-000E |
|---|---|---|---|---|---|---|---|
| Voltage - Isolation | 2500Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 5000Vrms | 3750Vrms | 3750Vrms |
| Common Mode Transient Immunity (Min) | 5kV/µs | 10kV/µs | 10kV/µs | 10kV/µs | 10kV/µs | 1kV/µs | 1kV/µs |
| Output Type | Open Collector | Open Collector, Schottky Clamped | Open Collector, Schottky Clamped | Open Collector, Schottky Clamped | Open Collector, Schottky Clamped | Open Collector, Schottky Clamped | Open Collector, Schottky Clamped |
| Data Rate | 10Mbps | 10MBd | 15MBd | 15MBd | 15MBd | 10MBd | 10MBd |
| Propagation Delay tpLH / tpHL (Max) | 75ns / 75ns | 100ns / 100ns | 75ns / 75ns | 75ns / 75ns | 75ns / 75ns | 100ns / 100ns | 100ns / 100ns |
| Current - Output / Channel | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA | 50 mA |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 2.7V ~ 3.6V, 4.5V ~ 5.5V | 2.7V ~ 3.6V, 4.5V ~ 5.5V | 2.7V ~ 3.6V, 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
| RoHS Status | ROHS3 Compliant | RoHS non-compliant | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes for Direct Replacement:
HCPL-260L and HCPL-260L-000E are the preferred direct substitutes for the obsolete HCPL2601. Both parts maintain identical package geometry, pinout compatibility, and supply voltage specifications. HCPL-260L-000E is recommended for new designs requiring RoHS3 compliance. Both variants offer superior isolation voltage (3750Vrms versus 2500Vrms) and enhanced CMTI (10kV/µs versus 5kV/µs), providing improved performance margins in high-speed switching environments. Data rate is increased to 15MBd, and propagation delay remains at 75ns maximum, matching the original specification.
HCPL-260L-020E provides the highest isolation voltage (5000Vrms) among active substitutes and maintains RoHS3 compliance. This variant is suitable for applications requiring maximum isolation margin or operation in high-voltage environments.
Secondary Substitute Option:
HCPL-2601 (Broadcom Limited) is an active direct equivalent with identical part number designation. This part offers 3750Vrms isolation and 10kV/µs CMTI but exhibits slightly longer propagation delay (100ns maximum versus 75ns). RoHS non-compliance status requires evaluation against design requirements.
Limited Compatibility Alternatives:
HCPL-261A and HCPL-261A-000E maintain open collector output topology but feature reduced CMTI (1kV/µs) and lower forward current specifications (10mA maximum). These parts are suitable only for applications with relaxed transient immunity requirements. HCPL-261A-000E provides RoHS3 compliance.
Not Recommended for Direct Substitution:
HCPL-2602, HCPL-2602-000E, HCPL-2612, and HCPL-2612-000E employ line receiver output topology rather than open collector configuration. These parts are functionally incompatible with open collector circuit designs and require circuit redesign for implementation.
Frequently Asked Questions (FAQ)
Q: Can HCPL-260L directly replace HCPL2601 without circuit modification?
A: Yes. HCPL-260L maintains identical pinout, package geometry, and supply voltage specifications. The part is a direct pin-for-pin replacement. Superior isolation voltage and CMTI specifications provide enhanced performance margins without requiring circuit changes.
Q: What is the difference between HCPL-260L and HCPL-260L-000E?
A: Both parts are functionally identical in electrical specifications. The primary difference is RoHS compliance status: HCPL-260L-000E is RoHS3 compliant, while HCPL-260L is RoHS non-compliant. Selection depends on design compliance requirements.
Q: Why do some substitutes have higher propagation delay (100ns) compared to the original (75ns)?
A: HCPL-2601 (Broadcom) and HCPL-261A variants exhibit 100ns maximum propagation delay due to different internal circuit design. This represents a 25ns increase but remains within acceptable limits for most 10Mbps applications. Applications with strict timing requirements should select HCPL-260L variants, which maintain 75ns maximum delay.
Q: Can HCPL-2602 or HCPL-2612 be used as substitutes?
A: No. These parts employ line receiver output topology instead of open collector configuration. Circuit redesign would be required to accommodate the different output stage. Use only if application requirements permit line receiver functionality.
Q: What is the significance of Schottky clamping in substitute parts?
A: Schottky clamping in HCPL-260L, HCPL-2601 (Broadcom), and HCPL-261A variants provides faster output switching and reduced parasitic effects compared to standard open collector designs. This enhancement improves data rate capability and reduces propagation delay variation.
Q: Is HCPL-260L-020E suitable for applications requiring 5kV isolation?
A: Yes. HCPL-260L-020E provides 5000Vrms isolation voltage, exceeding the original 2500Vrms specification. This variant is appropriate for applications requiring maximum isolation margin or operation in high-voltage environments. All other electrical parameters remain compatible with HCPL2601 requirements.
Q: What is the impact of dual supply voltage range in HCPL-260L variants?
A: HCPL-260L, HCPL-260L-000E, and HCPL-260L-020E support both 2.7V-3.6V and 4.5V-5.5V supply ranges. The original HCPL2601 operates only at 4.5V-5.5V. This expanded range provides design flexibility but does not affect compatibility when operating within the original 4.5V-5.5V specification.
Q: Are there inventory considerations for substitute selection?
A: HCPL-2601 (Broadcom) maintains the highest inventory (25,200 pcs), followed by HCPL-2602 and HCPL-2612 variants (3,300-3,536 pcs). HCPL-260L-020E has the lowest inventory (683 pcs). Availability should be confirmed with suppliers for production quantities.
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