HCPL-7721 Equivalent & Substitute Parts

Part Overview

The HCPL-7721 is a logic output optoisolator manufactured by Broadcom Limited, designed for high-speed digital isolation applications. This 3.75kV isolation rated component features push-pull totem pole output configuration with 25MBd data rate capability and 10kV/µs common mode transient immunity. The device is currently in active production status and widely used in industrial control, power management, and communication interface circuits requiring galvanic isolation between logic domains.

Substitute parts become necessary when addressing supply chain constraints, compliance requirements, or specific packaging preferences while maintaining identical electrical and mechanical performance characteristics.

Substiute Parts

HCPL-7721

Broadcom LimitedIn Stock: 23213HCPL-7721 Datasheet

Current PartRFQ

HCPL-7721-000E

Broadcom LimitedIn Stock: 6381HCPL-7721-000E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Isolation Voltage: 3750Vrms (non-negotiable for safety-critical applications)
• Output Configuration: Push-Pull, Totem Pole topology
• Data Rate: 25MBd minimum
• Common Mode Transient Immunity: 10kV/µs minimum
• Package: 8-DIP (0.300", 7.62mm) through-hole form factor
• Channel Count: Single channel (1 channel)
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C

The HCPL-7721-000E is a direct manufacturer-designated substitute that maintains identical electrical specifications and mechanical compatibility. This variant differs only in RoHS compliance status and inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both HCPL-7721 and HCPL-7721-000E are active production components from Broadcom Limited with identical electrical and mechanical specifications. Selection between these variants is determined by regulatory and compliance requirements:

HCPL-7721: Select this variant for applications where RoHS compliance is not mandated or where legacy system compatibility is required. This part maintains full active production status.

HCPL-7721-000E: Select this variant for new designs, EU market applications, or systems requiring ROHS3 compliance certification. This part is the manufacturer-recommended substitute and carries full ROHS3 compliance status while maintaining identical performance characteristics.

Both variants carry REACH Unaffected status and EAR99 export classification. Moisture sensitivity level remains constant at MSL 1 (Unlimited) for both parts, indicating no special storage or handling requirements.

Frequently Asked Questions (FAQ)

Q: Can HCPL-7721-000E be used as a direct replacement for HCPL-7721 in existing designs?

A: Yes. The HCPL-7721-000E is electrically and mechanically identical to the HCPL-7721. All electrical parameters, timing specifications, isolation voltage, output current, and package dimensions are equivalent. No circuit modifications are required.

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

A: The HCPL-7721-000E carries ROHS3 compliance certification, while the standard HCPL-7721 is RoHS non-compliant. All other specifications remain identical.

Q: Are both parts available in the same packaging format?

A: Yes. Both HCPL-7721 and HCPL-7721-000E are supplied in 8-DIP (0.300", 7.62mm) through-hole packages with identical pinout and mechanical dimensions.

Q: Which part should be selected for new product designs?

A: The HCPL-7721-000E is the manufacturer-recommended choice for new designs due to its ROHS3 compliance status, ensuring compatibility with current regulatory requirements and future supply chain standards.

Q: Do these parts have different operating temperature ranges?

A: No. Both variants operate across the identical temperature range of -40°C to 85°C with no derating differences.

Q: Is there a difference in isolation voltage rating between these parts?

A: No. Both HCPL-7721 and HCPL-7721-000E maintain the same 3750Vrms isolation voltage rating and 10kV/µs common mode transient immunity specification.