HCPL-7721-520 Equivalent & Substitute Parts

Part Overview

The HCPL-7721-520 is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. This component provides 5000Vrms isolation with push-pull totem pole output configuration, supporting data rates up to 25MBd and common mode transient immunity of 10kV/µs. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

HCPL-7721-520

Broadcom LimitedIn Stock: 1048HCPL-7721-520 Datasheet

Current PartRFQ

HCPL-7721-520E

Broadcom LimitedIn Stock: 1115HCPL-7721-520E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HCPL-7721-520 is determined by strict equivalence across the following critical parameters:

• Voltage isolation rating: 5000Vrms
• Common mode transient immunity: 10kV/µs minimum
• Output configuration: Push-pull, totem pole
• Data rate capability: 25MBd
• Output current per channel: 10 mA
• Number of channels: 1
• Package type: 8-SMD, Gull Wing
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C

The HCPL-7721-520E meets all these parameters and is therefore a direct functional equivalent. The primary distinction between these parts is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The HCPL-7721-520E is the direct substitute for the HCPL-7721-520. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The HCPL-7721-520E is currently in active production status, whereas the original part number is discontinued.

For new designs and ongoing production, the HCPL-7721-520E is the appropriate selection. The HCPL-7721-520E additionally provides ROHS3 compliance, whereas the original part is RoHS non-compliant. Both parts carry REACH Unaffected status and EAR99 ECCN classification.

The packaging difference—bulk versus tape and reel format—reflects standard distribution practices and does not affect component performance or compatibility in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can HCPL-7721-520E be used as a direct replacement for HCPL-7721-520?

A: Yes. The HCPL-7721-520E is electrically and mechanically identical to the HCPL-7721-520. Both parts feature the same isolation voltage, CMTI rating, output configuration, data rate, and package type. Pin-for-pin substitution is valid.

Q: What is the difference between HCPL-7721-520 and HCPL-7721-520E?

A: The primary differences are product status and packaging format. The HCPL-7721-520 is discontinued; the HCPL-7721-520E is active. The HCPL-7721-520E is supplied in tape and reel format, while the original is supplied in bulk. The HCPL-7721-520E also meets ROHS3 compliance standards.

Q: Are there any compatibility concerns when substituting HCPL-7721-520E for HCPL-7721-520?

A: No compatibility concerns exist. Both parts are manufactured by Broadcom Limited and share identical electrical specifications, including isolation voltage, CMTI, output current, data rate, propagation delay, and supply voltage requirements. The 8-SMD Gull Wing package is identical.

Q: Does the tape and reel packaging of HCPL-7721-520E affect circuit performance?

A: No. Packaging format does not affect component electrical performance or functionality. Tape and reel packaging is a distribution and handling format used for automated assembly processes.

Q: What is the significance of RoHS compliance differences?

A: The HCPL-7721-520E meets ROHS3 compliance, while the original HCPL-7721-520 does not. For applications subject to RoHS regulations or customer requirements, the HCPL-7721-520E is the compliant option.