HCPL-7721-020 Equivalent & Substitute Parts

Part Overview

The HCPL-7721-020 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 system support and new designs.

Substiute Parts

HCPL-7721-020

Broadcom LimitedIn Stock: 961HCPL-7721-020 Datasheet

Current PartRFQ

HCPL-7721-020E

Broadcom LimitedIn Stock: 2153HCPL-7721-020E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL-7721-020 is determined by strict equivalence across the following critical parameters:

• Isolation Voltage: 5000Vrms
• Output Configuration: Push-Pull, Totem Pole
• Number of Channels: 1 channel
• Common Mode Transient Immunity: 10kV/µs minimum
• Data Rate: 25MBd
• Package Type: 8-DIP (0.300", 7.62mm)
• Propagation Delay: 40ns maximum (both tpLH and tpHL)
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C

The HCPL-7721-020E meets all these parameters and is therefore a direct functional equivalent. Substitution is valid only when all specified electrical and mechanical parameters match or exceed the original part requirements.

Parameter Comparison

Engineering Selection Recommendations

The HCPL-7721-020E is the direct substitute for the HCPL-7721-020. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The primary distinction is product status: the original HCPL-7721-020 is discontinued, while the HCPL-7721-020E remains in active production with improved availability.

The HCPL-7721-020E offers an additional compliance advantage: it meets ROHS3 standards, whereas the original part is RoHS non-compliant. This makes the substitute part suitable for applications with regulatory compliance requirements. Both parts maintain the same moisture sensitivity level and thermal operating range.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-7721-020E be used as a direct replacement for the HCPL-7721-020?

A: Yes. The HCPL-7721-020E is electrically and mechanically identical to the HCPL-7721-020. All isolation voltage, output configuration, timing, and supply specifications are equivalent. Pin configuration and package dimensions are identical.

Q: What is the difference between the HCPL-7721-020 and HCPL-7721-020E?

A: The primary differences are product status and RoHS compliance. The HCPL-7721-020 is discontinued; the HCPL-7721-020E is active. The HCPL-7721-020E meets ROHS3 standards, while the original is RoHS non-compliant. All electrical and mechanical parameters are identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the 8-DIP (0.300", 7.62mm) package with identical pinout and through-hole mounting configuration.

Q: What is the base product number for these parts?

A: The base product number is HCPL-7721. The suffix designations (-020 and -020E) indicate specific packaging and compliance variants.

Q: Is the HCPL-7721-020E suitable for new designs?

A: Yes. The HCPL-7721-020E is in active production status and is the recommended choice for new designs requiring this optoisolator specification. Its ROHS3 compliance provides additional regulatory alignment for modern applications.