HCPL-273L#500 Equivalent & Substitute Parts

Part Overview

The HCPL-273L#500 is a 2-channel optoisolator with Darlington output manufactured by Broadcom Limited. It provides 3750Vrms isolation voltage and is designed for DC input applications requiring high-speed switching with integrated photodiode and Darlington output stage. The part is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

HCPL-273L#500

Broadcom LimitedIn Stock: 930HCPL-273L#500 Datasheet

Current PartRFQ

HCPL-270L-500E

Broadcom LimitedIn Stock: 841HCPL-270L-500E Datasheet

Parametric EquivalentRFQ

HCPL-273L-500E

Broadcom LimitedIn Stock: 781HCPL-273L-500E Datasheet

Parametric EquivalentRFQ

HCPL2730S

Fairchild SemiconductorIn Stock: 2300HCPL2730S Datasheet

MFR RecommendedRFQ

HCPL2730SD

onsemiIn Stock: 4478HCPL2730SD Datasheet

MFR RecommendedRFQ

HCPL2731S

onsemiIn Stock: 1131HCPL2731S Datasheet

MFR RecommendedRFQ

HCPL2731SD

onsemiIn Stock: 3156HCPL2731SD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL-273L#500 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Number of Channels: 2 (required for direct functional replacement)
• Output Type: Darlington (required for output stage compatibility)
• Voltage - Isolation: 3750Vrms minimum (required for isolation specification)
• Current Transfer Ratio: 300% minimum @ 1.6mA (required for switching performance)
• Current - Output / Channel: 60mA (required for load driving capability)
• Voltage - Output (Max): 7V (required for output voltage compatibility)
• Package / Case: 8-SMD, Gull Wing (required for mechanical fit)
• Input Type: DC (required for input signal compatibility)

Substitute Categories:

Category 1: Direct Parametric Equivalents (Identical Isolation Voltage)

• HCPL-273L-500E: Identical electrical specifications, active product status, ROHS3 compliant

Category 2: Parametric Equivalents with Reduced Isolation Voltage

• HCPL-270L-500E: Single-channel variant, 3750Vrms isolation, identical switching characteristics, active product status, ROHS3 compliant
• HCPL2730S: 2500Vrms isolation (reduced from 3750Vrms), 2-channel configuration, active product status
• HCPL2730SD: 2500Vrms isolation (reduced from 3750Vrms), 2-channel configuration, obsolete product status, ROHS3 compliant
• HCPL2731S: 2500Vrms isolation (reduced from 3750Vrms), 2-channel configuration, higher current transfer ratio (500% min), 18V output maximum, obsolete product status, ROHS3 compliant
• HCPL2731SD: 2500Vrms isolation (reduced from 3750Vrms), 2-channel configuration, higher current transfer ratio (500% min), 18V output maximum, obsolete product status, ROHS3 compliant

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: HCPL-273L-500E

The HCPL-273L-500E is the direct parametric equivalent of the HCPL-273L#500. It maintains identical electrical specifications across all critical parameters including 3750Vrms isolation voltage, 2-channel configuration, 300-2600% current transfer ratio, and 25µs/50µs switching times. The part is in active product status and ROHS3 compliant, providing superior long-term availability and regulatory compliance compared to the discontinued original part.

Secondary Recommendation: HCPL-270L-500E

The HCPL-270L-500E is suitable for applications requiring single-channel isolation with identical 3750Vrms isolation voltage and switching characteristics. This part is active and ROHS3 compliant. Selection of this part requires circuit redesign to accommodate single-channel operation.

Alternative Recommendations for Reduced Isolation Voltage Applications: HCPL2730S, HCPL2730SD

The HCPL2730S and HCPL2730SD are suitable for applications where 2500Vrms isolation voltage is acceptable. Both maintain 2-channel configuration, 60mA output current, and Darlington output type. The HCPL2730S is in active product status. The HCPL2730SD is obsolete but ROHS3 compliant. These parts feature faster switching times (300ns/5µs) compared to the original part.

Alternative Recommendations for Enhanced Performance: HCPL2731S, HCPL2731SD

The HCPL2731S and HCPL2731SD are suitable for applications where 2500Vrms isolation voltage is acceptable and higher current transfer ratio (500% minimum) is beneficial. Both parts feature 18V maximum output voltage, providing greater output voltage headroom than the original 7V specification. Both are obsolete products. These parts feature faster switching times (300ns/5µs) and are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can HCPL-273L-500E directly replace HCPL-273L#500 without circuit modification?

A: Yes. The HCPL-273L-500E is a direct parametric equivalent with identical electrical specifications, package configuration, and pin assignment. No circuit modification is required.

Q: What is the key difference between HCPL-273L#500 and HCPL-270L-500E?

A: The HCPL-270L-500E is a single-channel variant compared to the 2-channel HCPL-273L#500. Both maintain 3750Vrms isolation voltage and identical switching characteristics. Circuit redesign is required if dual-channel isolation is necessary.

Q: Can HCPL2730S or HCPL2730SD be used as direct replacements?

A: These parts are functionally compatible for 2-channel applications but feature reduced isolation voltage (2500Vrms versus 3750Vrms). Selection is appropriate only if the application isolation requirement is 2500Vrms or lower. Both parts feature faster switching times (300ns/5µs versus 25µs/50µs).

Q: What are the advantages of HCPL2731S or HCPL2731SD?

A: These parts provide higher current transfer ratio (500% minimum versus 300% minimum) and greater output voltage capability (18V maximum versus 7V maximum). Isolation voltage is reduced to 2500Vrms. These parts are suitable for applications requiring enhanced output voltage swing or improved switching gain.

Q: Are there compliance differences between substitute parts?

A: The original HCPL-273L#500 is RoHS non-compliant. The HCPL-273L-500E, HCPL-270L-500E, HCPL2730SD, HCPL2731S, and HCPL2731SD are all ROHS3 compliant. The HCPL2730S compliance status is not specified. For applications requiring RoHS compliance, HCPL-273L-500E is the recommended selection.

Q: What is the impact of switching time differences?

A: The HCPL2730S, HCPL2730SD, HCPL2731S, and HCPL2731SD feature significantly faster switching times (300ns turn-on, 5µs turn-off) compared to the original part (25µs turn-on, 50µs turn-off). This faster switching may require circuit evaluation if timing-critical applications depend on the original switching characteristics.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use 8-SMD, Gull Wing package configuration, maintaining mechanical compatibility with the original HCPL-273L#500 footprint.