HCPL-7720-320 Equivalent & Substitute Parts

Part Overview

The HCPL-7720-320 is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. It 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 identification of suitable alternatives necessary for ongoing design support and procurement.

Substiute Parts

HCPL-7720-320

Broadcom LimitedIn Stock: 1016HCPL-7720-320 Datasheet

Current PartRFQ

HCPL-7720-320E

Broadcom LimitedIn Stock: 985HCPL-7720-320E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-7720-320 is determined by strict equivalence across the following critical parameters:

• Isolation voltage: 5000Vrms
• Common mode transient immunity: 10kV/µs minimum
• Output configuration: Push-pull, totem pole
• Data rate: 25MBd
• Output current per channel: 10 mA
• Propagation delay: 40ns maximum (both tpLH and tpHL)
• Package type: 8-SMD, Gull Wing
• Supply voltage range: 4.5V to 5.5V
• Single channel configuration

The HCPL-7720-320E meets all these criteria and is classified as a direct substitute. The primary distinction between the main part and its substitute is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The HCPL-7720-320E is the direct substitute for the HCPL-7720-320. Both parts share identical electrical and mechanical specifications across all critical isolation, timing, and output parameters. The HCPL-7720-320E is currently in active production status, ensuring long-term availability and supply chain continuity.

The HCPL-7720-320E offers improved compliance status, meeting ROHS3 requirements compared to the non-compliant status of the original part. This compliance improvement is relevant for applications subject to environmental and regulatory standards. Both parts maintain equivalent performance in isolation voltage, common mode transient immunity, data rate, and propagation delay characteristics.

Frequently Asked Questions (FAQ)

Q: Can HCPL-7720-320E be used as a direct replacement for HCPL-7720-320?

A: Yes. The HCPL-7720-320E is electrically and mechanically equivalent to the HCPL-7720-320. All critical parameters including isolation voltage (5000Vrms), CMTI (10kV/µs), data rate (25MBd), output current (10 mA), and propagation delay (40ns) are identical. Both use the same 8-SMD Gull Wing package.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and compliance. The HCPL-7720-320 is discontinued, while the HCPL-7720-320E is active. The HCPL-7720-320E meets ROHS3 compliance standards, whereas the original part is RoHS non-compliant. Packaging format differs (tube for the substitute).

Q: Are there any timing or performance differences between these parts?

A: No. Both parts have identical propagation delay specifications (40ns maximum for both tpLH and tpHL), rise time (9ns typical), and fall time (8ns typical). They operate at the same supply voltage range (4.5V to 5.5V) and temperature range (-40°C to 85°C).

Q: Is the 8-SMD Gull Wing package compatible with existing PCB designs?

A: Yes. Both parts use the same 8-SMD Gull Wing surface mount package. PCB footprints, solder pad layouts, and assembly processes remain unchanged between the two parts.

Q: Why should I transition to HCPL-7720-320E?

A: The HCPL-7720-320 is discontinued at DiGi Electronics, making future procurement difficult. The HCPL-7720-320E provides identical functionality with active production status, ensuring reliable supply chain access and compliance with current environmental standards.