HCPL-7721#300 Equivalent & Substitute Parts

Part Overview

The HCPL-7721#300 is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. It provides 3750Vrms isolation with push-pull, totem pole output configuration and supports data rates up to 25MBd. The device is currently discontinued at DiGi Electronics, making identification of equivalent substitute parts essential for ongoing production and maintenance applications requiring this isolation topology and performance specification.

Substiute Parts

HCPL-7721#300

Broadcom LimitedIn Stock: 1091HCPL-7721#300 Datasheet

Current PartRFQ

HCPL-7721-300E

Broadcom LimitedIn Stock: 6067HCPL-7721-300E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL-7721#300 is determined by strict equivalence across the following critical parameters:

• Isolation voltage: 3750Vrms
• Output configuration: Push-pull, totem pole topology
• Data rate capability: 25MBd minimum
• Common mode transient immunity: 10kV/µs minimum
• Output current per channel: 10 mA
• Package type: 8-SMD, Gull Wing
• Supply voltage range: 4.5V ~ 5.5V
• Single channel configuration

The HCPL-7721-300E meets all these criteria and is identified as a direct substitute. Both parts share identical electrical specifications, isolation ratings, and mechanical packaging, differing only in product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The HCPL-7721-300E is the direct substitute for the HCPL-7721#300. Both parts are manufactured by Broadcom Limited and provide identical electrical and mechanical specifications. The primary distinction is product lifecycle status: the HCPL-7721#300 is discontinued, while the HCPL-7721-300E maintains active production status with improved compliance posture.

For new designs and ongoing production requiring this optoisolator specification, the HCPL-7721-300E is the appropriate selection. The HCPL-7721-300E achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. Both parts carry REACH Unaffected status and EAR99 export classification.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-7721-300E directly replace the HCPL-7721#300 in existing designs?

A: Yes. The HCPL-7721-300E is electrically and mechanically identical to the HCPL-7721#300. All electrical parameters, isolation ratings, timing specifications, and package dimensions are equivalent. Direct substitution is supported without circuit modification.

Q: What is the difference between HCPL-7721#300 and HCPL-7721-300E?

A: The parts are functionally identical. The HCPL-7721-300E is the active production variant with ROHS3 compliance. The HCPL-7721#300 is discontinued and RoHS non-compliant. Both share the same base product number HCPL-7721 and identical performance specifications.

Q: Are there packaging differences between these parts?

A: Both parts use 8-SMD, Gull Wing surface mount packaging. The HCPL-7721-300E is supplied in tube packaging, while the HCPL-7721#300 packaging specification was not provided. The mechanical footprint and pin configuration are identical.

Q: What isolation voltage does this optoisolator provide?

A: Both the HCPL-7721#300 and HCPL-7721-300E provide 3750Vrms isolation with 10kV/µs common mode transient immunity.

Q: Is the HCPL-7721-300E suitable for high-speed digital isolation applications?

A: Yes. The HCPL-7721-300E supports 25MBd data rates with 40ns maximum propagation delay and 9ns/8ns typical rise/fall times, making it suitable for high-speed logic isolation in industrial and communication applications.