FOD073LR1 Equivalent & Substitute Parts

Part Overview

The FOD073LR1 is a 2-channel optoisolator with Darlington output, rated for 2500Vrms isolation voltage, manufactured by onsemi. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The FOD073LR1 provides DC input isolation with dual Darlington outputs suitable for logic-level switching applications in industrial and consumer electronics.

Substiute Parts

FOD073LR1

onsemiIn Stock: 14017FOD073LR1 Datasheet

Current PartRFQ

FOD073LR2

Fairchild SemiconductorIn Stock: 2710FOD073LR2 Datasheet

Parametric EquivalentRFQ

HCPL-073A

Broadcom LimitedIn Stock: 2282HCPL-073A Datasheet

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HCPL-073A-000E

Broadcom LimitedIn Stock: 1558HCPL-073A-000E Datasheet

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HCPL-073A-500E

Broadcom LimitedIn Stock: 2831HCPL-073A-500E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FOD073LR1 are classified into two categories based on electrical parameter alignment:

Parametric Equivalent: FOD073LR2 matches all critical electrical specifications of the FOD073LR1, including 2500Vrms isolation voltage, 400-7000% current transfer ratio range, 5µs/25µs switching times, 7V maximum output voltage, and 60mA per-channel output current. This part is manufactured by Fairchild Semiconductor and maintains active product status with identical package configuration.

Similar Substitutes: HCPL-073A, HCPL-073A-000E, and HCPL-073A-500E are manufactured by Broadcom Limited and provide enhanced electrical performance with 3750Vrms isolation voltage, 600-8000% current transfer ratio range, 3µs/34µs switching times, and 18V maximum output voltage. These parts share the same 2-channel Darlington output topology, DC input type, 60mA per-channel output current, and 8-SOIC package footprint. The key differentiators are higher isolation rating, improved current transfer ratio, and extended output voltage capability.

Parameter Comparison

Engineering Selection Recommendations

FOD073LR2 is the direct parametric equivalent for FOD073LR1 replacement. This part maintains identical electrical specifications and operating temperature range while offering active product status and ROHS3 compliance, providing superior long-term availability and regulatory alignment compared to the obsolete FOD073LR1.

HCPL-073A-000E and HCPL-073A-500E are suitable substitutes when design specifications allow for enhanced performance characteristics. These parts provide higher isolation voltage (3750Vrms vs. 2500Vrms), improved current transfer ratio floor (600% vs. 400%), and extended output voltage capability (18V vs. 7V). Both variants are ROHS3 compliant with active product status. Selection between these two depends on packaging requirements: HCPL-073A-000E is supplied in tube packaging, while HCPL-073A-500E is supplied in cut tape and Digi-Reel format.

HCPL-073A is functionally equivalent to the HCPL-073A-000E and HCPL-073A-500E variants but carries RoHS non-compliant status, making it unsuitable for applications requiring regulatory compliance documentation.

Operating temperature range differs between FOD073LR1/FOD073LR2 (-40°C to 85°C) and HCPL-073A variants (0°C to 70°C). Applications requiring extended low-temperature operation below 0°C must use FOD073LR2.

Frequently Asked Questions (FAQ)

Q: Can FOD073LR2 be used as a direct replacement for FOD073LR1?

A: Yes. FOD073LR2 is a parametric equivalent with identical electrical specifications, including isolation voltage, current transfer ratio range, switching times, output voltage, and output current per channel. Both parts use the same 8-SOIC package footprint and support the same operating temperature range. FOD073LR2 offers the advantage of active product status and ROHS3 compliance.

Q: What are the key differences between FOD073LR2 and HCPL-073A variants?

A: FOD073LR2 maintains the original 2500Vrms isolation specification, while HCPL-073A variants provide 3750Vrms isolation. HCPL-073A variants offer higher current transfer ratio (600-8000% vs. 400-7000%), faster turn-on time (3µs vs. 5µs), and higher maximum output voltage (18V vs. 7V). FOD073LR2 supports the extended operating temperature range of -40°C to 85°C, whereas HCPL-073A variants operate from 0°C to 70°C.

Q: Are HCPL-073A-000E and HCPL-073A-500E electrically identical?

A: Yes. Both parts have identical electrical specifications. The difference is packaging format: HCPL-073A-000E is supplied in tube packaging, while HCPL-073A-500E is supplied in cut tape and Digi-Reel format. Selection depends on assembly line requirements and inventory management preferences.

Q: Can HCPL-073A variants be used in applications requiring -40°C operation?

A: No. HCPL-073A variants are rated for 0°C to 70°C operating temperature. Applications requiring operation below 0°C must use FOD073LR1 or FOD073LR2, both rated for -40°C to 85°C.

Q: What is the significance of RoHS compliance status in substitute selection?

A: ROHS3 compliance indicates the part meets current European Union Restriction of Hazardous Substances regulations. FOD073LR2, HCPL-073A-000E, and HCPL-073A-500E are ROHS3 compliant. HCPL-073A is RoHS non-compliant. For applications subject to regulatory compliance requirements or customer specifications mandating RoHS compliance, use only ROHS3-compliant variants.

Q: Do all substitute parts use the same 8-SOIC package?

A: Yes. FOD073LR1, FOD073LR2, and all HCPL-073A variants use the 8-SOIC package with 0.154" (3.90mm) width. PCB footprints and assembly processes are compatible across all listed parts.

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

A: FOD073LR2 is recommended for designs requiring exact electrical equivalence to FOD073LR1. HCPL-073A-000E or HCPL-073A-500E are recommended for new designs where enhanced isolation voltage, improved current transfer ratio, and higher output voltage capability provide system benefits. All three active parts offer superior long-term availability compared to the obsolete FOD073LR1.