HCPL2631S Equivalent & Substitute Parts

Part Overview

The HCPL2631S is a logic output optoisolator manufactured by onsemi, designed for applications requiring galvanic isolation with open collector output configuration. This device provides 2500Vrms isolation voltage across 2 channels with a maximum data rate of 10Mbps and common mode transient immunity of 5kV/µs. The HCPL2631S is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

HCPL2631S

onsemiIn Stock: 2806HCPL2631S Datasheet

Current PartRFQ

HCPL2631SM

onsemiIn Stock: 12831HCPL2631SM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL2631S is determined by the following critical parameters that must remain compatible:

• Channel Configuration: Both devices must provide 2 channels with DC input and open collector output
• Data Rate: Minimum 10Mbps capability required
• Common Mode Transient Immunity: Minimum 5kV/µs CMTI required
• Mounting and Package: Surface mount 8-SMD, Gull Wing configuration
• Supply Voltage: 4.5V ~ 5.5V operating range
• Isolation Voltage: Minimum 2500Vrms isolation capability
• Output Current: Minimum 25 mA per channel (HCPL2631S provides 50 mA)

The HCPL2631SM qualifies as a direct substitute based on these parameters. While it provides enhanced isolation voltage (5000Vrms versus 2500Vrms) and extended operating temperature range (-40°C ~ 110°C versus -40°C ~ 85°C), it maintains full compatibility with the core functional requirements and package specifications of the HCPL2631S.

Parameter Comparison

Engineering Selection Recommendations

The HCPL2631SM is the recommended substitute for the obsolete HCPL2631S. Selection is based on the following factors:

• Product Status: The HCPL2631SM maintains active product status with onsemi, ensuring continued availability and manufacturing support, whereas the HCPL2631S is obsolete.
• Regulatory Compliance: Both devices maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.
• Functional Compatibility: The HCPL2631SM preserves all critical functional parameters including channel count, data rate, CMTI, supply voltage range, and package configuration.
• Enhanced Specifications: The HCPL2631SM provides superior isolation voltage (5000Vrms) and extended operating temperature range (-40°C ~ 110°C), offering improved performance margins for demanding applications.
• Output Current Consideration: The HCPL2631SM provides 25 mA per channel output current compared to 50 mA in the HCPL2631S. System designs must verify that 25 mA output current is sufficient for the intended load requirements.

Frequently Asked Questions (FAQ)

Q: Can the HCPL2631SM directly replace the HCPL2631S in existing designs?

A: Yes, the HCPL2631SM is a direct functional replacement. Both devices share identical channel configuration, data rate, CMTI, supply voltage range, and 8-SMD package specifications. However, the reduced output current per channel (25 mA versus 50 mA) must be verified against system load requirements.

Q: What is the significance of the higher isolation voltage in the HCPL2631SM?

A: The HCPL2631SM provides 5000Vrms isolation compared to 2500Vrms in the HCPL2631S. This enhanced isolation voltage provides greater safety margins and is suitable for applications requiring higher isolation ratings. It does not negatively impact compatibility with designs specified for 2500Vrms isolation.

Q: Are there any temperature operating range differences?

A: Yes. The HCPL2631S operates from -40°C to 85°C, while the HCPL2631SM extends to -40°C to 110°C. The HCPL2631SM is suitable for applications requiring extended high-temperature operation. For applications limited to -40°C to 85°C, both devices are compatible.

Q: Do both devices use the same packaging?

A: Yes. Both the HCPL2631S and HCPL2631SM use 8-SMD, Gull Wing surface mount packages. No PCB layout modifications are required for substitution.

Q: What compliance certifications apply to both devices?

A: Both devices are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. They meet current environmental and regulatory standards for electronic component manufacturing and use.

Q: Why is the HCPL2631S classified as obsolete?

A: The HCPL2631S is no longer in active production by onsemi. The HCPL2631SM represents the current active product offering with equivalent and enhanced specifications, making it the appropriate choice for new designs and ongoing system support.