HCPL-675K Equivalent & Substitute Parts

Part Overview

The HCPL-675K is a 4-channel optoisolator with Darlington output, rated for 1500VDC isolation voltage. This component is designed for applications requiring galvanic isolation between logic and power circuits with moderate current switching requirements. The part is currently active in production with full inventory availability. Substitute parts may be required due to supply constraints, regional availability, or design flexibility in component sourcing.

Substiute Parts

HCPL-675K

Broadcom LimitedIn Stock: 1974HCPL-675K Datasheet

Current PartRFQ

HCPL-6751

Broadcom LimitedIn Stock: 3630HCPL-6751 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The HCPL-6751 qualifies as a parametric equivalent to the HCPL-675K based on the following critical substitution criteria:

• 4-channel configuration with identical channel count
• 1500VDC isolation voltage rating
• Darlington output topology
• 200% minimum current transfer ratio @ 5mA
• 2µs turn-on and 8µs turn-off timing specifications
• 20V maximum output voltage
• 40mA per-channel output current capability
• 16-FlatPack surface mount package
• Identical operating temperature range (-55°C ~ 125°C)
• ROHS3 compliance and MSL 1 rating

Both parts share the same base product family (HCPL-675 series) and maintain electrical and mechanical compatibility within the specified parameter set.

Parameter Comparison

Engineering Selection Recommendations

Both HCPL-675K and HCPL-6751 are active production components from Broadcom Limited with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on inventory availability and supply chain requirements. The HCPL-6751 currently maintains higher inventory levels (3538 pcs vs. 1940 pcs), which may influence procurement decisions for high-volume applications. Both parts carry identical electrical specifications, thermal ratings, and regulatory certifications, making them functionally interchangeable within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can HCPL-6751 be used as a direct replacement for HCPL-675K?

A: Yes. Both parts are parametrically equivalent across all specified electrical and mechanical parameters, including isolation voltage, channel count, output current, timing characteristics, and package configuration.

Q: Are there any differences in compliance or certifications between these parts?

A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and MSL 1 rating.

Q: What is the significance of the different part numbers within the HCPL-675 series?

A: The HCPL-675K and HCPL-6751 represent different product variants within the same base family. The suffix designations may indicate manufacturing date codes or internal Broadcom product line classifications, but they do not affect electrical or mechanical compatibility when parameters are identical.

Q: Is the 16-FlatPack package identical for both parts?

A: Yes. Both parts use the same 16-FlatPack surface mount package with identical pin configuration and mechanical dimensions.

Q: What factors should determine which part to select?

A: Selection should be based on supply availability, inventory levels, and procurement lead times. From an engineering perspective, both parts are functionally equivalent and will perform identically in circuit applications designed for the HCPL-675K specification.