HCPL2631SD Equivalent & Substitute Parts

Part Overview

The HCPL2631SD 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 10Mbps data rate capability and 5kV/µs common mode transient immunity. The HCPL2631SD is classified as obsolete, making identification of suitable substitute components necessary for ongoing system support and new design implementations.

Substiute Parts

HCPL2631SD

onsemiIn Stock: 15796HCPL2631SD Datasheet

Current PartRFQ

HCPL2631SDM

onsemiIn Stock: 88492HCPL2631SDM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL2631SD is determined by the following critical parameters:

• Channel Configuration: 2-channel architecture with DC input and open collector output
• Isolation Voltage: Minimum 2500Vrms isolation capability
• Common Mode Transient Immunity: 5kV/µs minimum performance
• Data Rate: 10Mbps operation
• Package Compatibility: 8-SMD, Gull Wing surface mount form factor
• Supply Voltage Range: 4.5V to 5.5V operation
• Regulatory Compliance: ROHS3 compliance required

The HCPL2631SDM qualifies as a direct substitute based on these parameters. While the HCPL2631SDM provides enhanced isolation voltage (5000Vrms versus 2500Vrms) and extended operating temperature range (-40°C to 110°C versus -40°C to 85°C), it maintains all critical functional and mechanical compatibility requirements.

Parameter Comparison

Engineering Selection Recommendations

The HCPL2631SDM is the recommended substitute for the obsolete HCPL2631SD. Both devices maintain identical functional specifications for channel count, data rate, common mode transient immunity, and supply voltage requirements. The HCPL2631SDM is currently in active production status, ensuring long-term availability and supply chain continuity.

The HCPL2631SDM provides enhanced isolation voltage rating (5000Vrms) compared to the HCPL2631SD (2500Vrms), offering improved performance margin in high-voltage isolation applications. The extended operating temperature range of the HCPL2631SDM (-40°C to 110°C) accommodates broader environmental conditions than the original part (-40°C to 85°C).

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current manufacturing standards. The identical 8-SMD, Gull Wing package ensures direct mechanical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q: Can the HCPL2631SDM directly replace the HCPL2631SD without PCB modifications?

A: Yes. Both devices use identical 8-SMD, Gull Wing package geometry and pinout configuration, enabling direct substitution without PCB layout changes.

Q: What is the primary difference between these two parts?

A: The HCPL2631SDM provides 5000Vrms isolation voltage compared to the HCPL2631SD's 2500Vrms rating. The HCPL2631SDM also supports an extended operating temperature range to 110°C. Both maintain identical channel configuration, data rate, and common mode transient immunity specifications.

Q: Is the output current rating difference significant for substitution?

A: The HCPL2631SDM specifies 25 mA maximum output current per channel, while the HCPL2631SD specifies 50 mA. Circuit designs must verify that load requirements do not exceed 25 mA per channel when using the HCPL2631SDM as a substitute.

Q: Are there supply chain advantages to using the HCPL2631SDM?

A: Yes. The HCPL2631SDM maintains active production status with significantly higher inventory availability (88,400 pieces) compared to the obsolete HCPL2631SD, ensuring reliable long-term sourcing.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. Both the HCPL2631SD and HCPL2631SDM are ROHS3 compliant and REACH unaffected, satisfying current environmental and regulatory requirements.