HCPL-0721-560E Equivalent & Substitute Parts

Part Overview

The HCPL-0721-560E is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. This 3750Vrms isolation device operates at 25MBd with push-pull totem pole output configuration and 10kV/µs common mode transient immunity. The part is currently active in production and widely used in industrial control, power conversion, and communication interface circuits requiring galvanic isolation.

Substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from alternative manufacturers offering equivalent electrical and mechanical specifications within the same isolation voltage class and data rate category.

Substiute Parts

HCPL-0721-560E

Broadcom LimitedIn Stock: 1017HCPL-0721-560E Datasheet

Current PartRFQ

FOD0710

Fairchild SemiconductorIn Stock: 19137FOD0710 Datasheet

MFR RecommendedRFQ

FOD0710R2

onsemiIn Stock: 3727FOD0710R2 Datasheet

MFR RecommendedRFQ

FOD0720

Fairchild SemiconductorIn Stock: 5469FOD0720 Datasheet

MFR RecommendedRFQ

FOD0720R2

Fairchild SemiconductorIn Stock: 3747FOD0720R2 Datasheet

MFR RecommendedRFQ

FOD0721

onsemiIn Stock: 1997FOD0721 Datasheet

MFR RecommendedRFQ

FOD0721R2

onsemiIn Stock: 3926FOD0721R2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HCPL-0721-560E are grouped based on strict equivalence of the following critical parameters:

• Isolation Voltage: 3750Vrms (mandatory match)
• Output Configuration: Push-Pull, Totem Pole (mandatory match)
• Number of Channels: 1 (mandatory match)
• Package Type: 8-SOIC with 0.154" width, 3.90mm (mandatory match)
• Supply Voltage Range: 4.5V ~ 5.5V (mandatory match)
• Output Current: 10 mA per channel (mandatory match)

Substitutes are divided into two functional categories:

Category A - Direct Speed Match (25Mbps Data Rate): FOD0720, FOD0720R2, FOD0721, FOD0721R2 — These parts maintain the 25Mbps data rate specification of the primary part. All operate at 3750Vrms isolation with identical output configuration and package specifications.

Category B - Reduced Speed Alternative (12.5Mbps Data Rate): FOD0710, FOD0710R2 — These parts operate at half the data rate (12.5Mbps) but maintain all other critical parameters including isolation voltage, output type, package, and supply voltage. Selection from this category is appropriate only when application bandwidth requirements do not exceed 12.5Mbps.

All substitute parts listed maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage protocols.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (25Mbps Applications):

FOD0721 and FOD0721R2 from onsemi are the primary substitutes when maintaining the 25Mbps data rate specification. Both parts are ROHS3 compliant with MSL 1 rating. FOD0721R2 is supplied in Tape & Reel packaging, suitable for automated assembly environments. FOD0721 is supplied in Tube packaging. Both maintain the -40°C to 100°C operating temperature range, which extends the upper limit beyond the primary part's 85°C specification.

FOD0720 and FOD0720R2 from Fairchild Semiconductor are alternative 25Mbps options. These parts are functionally equivalent but RoHS and MSL compliance status is not specified in the provided data. FOD0720R2 is supplied in Bulk packaging.

For Reduced Bandwidth Applications (12.5Mbps Maximum):

FOD0710 from Fairchild Semiconductor and FOD0710R2 from onsemi operate at 12.5Mbps and are suitable only when application requirements do not exceed this data rate. FOD0710R2 is ROHS3 compliant with MSL 1 rating and Tape & Reel packaging. FOD0710 compliance status is not specified.

Packaging Considerations:

The primary part HCPL-0721-560E is supplied in Tape & Reel format. Substitute selection should prioritize parts with matching packaging format (FOD0721R2, FOD0710R2) for seamless integration into existing manufacturing workflows. Alternative packaging formats require process validation.

Temperature Range Extension:

All substitute parts extend the upper operating temperature limit to 100°C compared to the primary part's 85°C maximum. This provides additional thermal margin in applications operating near the upper temperature boundary.

Frequently Asked Questions (FAQ)

Q: Can FOD0710 or FOD0710R2 be used as direct replacements for HCPL-0721-560E?

A: FOD0710 and FOD0710R2 are functionally compatible at the package and isolation voltage level but operate at 12.5Mbps instead of 25Mbps. Direct substitution is valid only if the application bandwidth requirement does not exceed 12.5Mbps. All other electrical parameters including isolation voltage, output configuration, supply voltage, and package dimensions are identical.

Q: What is the difference between FOD0721 and FOD0721R2?

A: Both parts are electrically identical. The difference is packaging format: FOD0721 is supplied in Tube packaging, while FOD0721R2 is supplied in Tape & Reel (TR) format. Selection depends on manufacturing process requirements and inventory handling procedures.

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for FOD0710R2, FOD0721, and FOD0721R2. Compliance status for FOD0710, FOD0720, and FOD0720R2 is not specified in the provided data and must be verified with the manufacturer or distributor.

Q: Do substitute parts have the same moisture sensitivity level as HCPL-0721-560E?

A: MSL 1 (Unlimited) is confirmed for FOD0710R2, FOD0721, and FOD0721R2. MSL rating for FOD0710, FOD0720, and FOD0720R2 is not specified and must be confirmed before use in moisture-sensitive manufacturing environments.

Q: What is the significance of the higher Common Mode Transient Immunity (CMTI) in substitute parts?

A: Substitute parts specify 20kV/µs CMTI compared to the primary part's 10kV/µs. Higher CMTI indicates improved noise immunity and faster transient rejection capability. This is a performance enhancement and does not affect compatibility or substitutability.

Q: Can FOD0720 or FOD0720R2 be used instead of FOD0721 or FOD0721R2?

A: Yes. FOD0720 and FOD0720R2 are electrically equivalent to FOD0721 and FOD0721R2 at the 25Mbps data rate. All critical parameters including isolation voltage, output configuration, package, and supply voltage are identical. Selection between these alternatives depends on manufacturer preference, availability, and compliance documentation requirements.

Q: What is the impact of the extended operating temperature range (-40°C to 100°C) in substitute parts?

A: Substitute parts extend the upper operating temperature limit from 85°C to 100°C. This provides additional thermal margin and may eliminate the need for thermal derating in applications operating near 85°C. The extended range does not affect compatibility or require circuit modifications.