HCPL-273L Equivalent & Substitute Parts

Part Overview

The HCPL-273L is a 2-channel optoisolator with Darlington output manufactured by Broadcom Limited. It provides 3750Vrms isolation voltage and is housed in an 8-DIP through-hole package. The part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Substiute Parts

HCPL-273L

Broadcom LimitedIn Stock: 1210HCPL-273L Datasheet

Current PartRFQ

HCPL-270L

Broadcom LimitedIn Stock: 1089HCPL-270L Datasheet

Parametric EquivalentRFQ

HCPL-270L-000E

Broadcom LimitedIn Stock: 6084HCPL-270L-000E Datasheet

Parametric EquivalentRFQ

HCPL2730

onsemiIn Stock: 5575HCPL2730 Datasheet

MFR RecommendedRFQ

HCPL2731V

onsemiIn Stock: 832HCPL2731V Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HCPL-273L is determined by the following critical parameters:

Primary Substitution Criteria:

• Number of channels (2-channel requirement)
• Voltage isolation rating (3750Vrms minimum)
• Output type (Darlington)
• Package type (8-DIP through-hole)
• Current transfer ratio range (300% minimum @ 1.6mA)
• Maximum output current per channel (60mA)
• Maximum output voltage (7V)

Substitution Categories:

Parametric Equivalents (Broadcom HCPL-270L Series): These parts maintain identical electrical specifications but differ in channel count (1-channel vs. 2-channel). They are suitable for applications where dual-channel isolation is not required or where two single-channel devices can be used in parallel.

Manufacturer Recommended Alternatives (onsemi HCPL2730 / HCPL2731V): These parts provide 2-channel configuration matching the HCPL-273L but operate at reduced isolation voltage (2500Vrms vs. 3750Vrms). They are suitable only for applications where the lower isolation rating is acceptable.

Parameter Comparison

Engineering Selection Recommendations

For Direct 2-Channel, 3750Vrms Replacement: No direct equivalent exists. The HCPL-273L is discontinued with no active 2-channel Broadcom optoisolator at 3750Vrms isolation. The HCPL-270L and HCPL-270L-000E are single-channel alternatives requiring dual-device implementation.

For 2-Channel Applications with Reduced Isolation Voltage: The HCPL2730 and HCPL2731V from onsemi provide 2-channel configuration but at 2500Vrms isolation. These are suitable only if the application isolation requirements can be met at the lower voltage rating. Both parts are obsolete but available in inventory.

For RoHS Compliance: The HCPL-270L-000E is the only active substitute with ROHS3 compliance. The original HCPL-273L and HCPL-270L are RoHS non-compliant. The onsemi alternatives (HCPL2730, HCPL2731V) are ROHS3 compliant but obsolete.

For Extended Temperature Range: The onsemi parts (HCPL2730, HCPL2731V) operate from -40°C to 85°C, compared to the HCPL-273L range of 0°C to 70°C. This provides wider temperature coverage if required.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-270L directly replace the HCPL-273L? A: No. The HCPL-270L is a single-channel device, while the HCPL-273L is 2-channel. Two HCPL-270L devices can be used in parallel to achieve dual-channel isolation, but this requires additional board space and design modifications.

Q: What is the key difference between HCPL-270L and HCPL-270L-000E? A: Both are electrically identical single-channel optoisolators with 3750Vrms isolation. The primary difference is RoHS compliance: HCPL-270L-000E is ROHS3 compliant, while HCPL-270L is RoHS non-compliant. The HCPL-270L-000E is the recommended choice for new designs.

Q: Can the onsemi HCPL2730 replace the HCPL-273L? A: Partial substitution only. The HCPL2730 provides 2-channel configuration and 8-DIP packaging, but isolation voltage is reduced from 3750Vrms to 2500Vrms. This is acceptable only if the application isolation requirements do not exceed 2500Vrms. The part is obsolete.

Q: What is the difference between HCPL2730 and HCPL2731V? A: Both are 2-channel onsemi optoisolators at 2500Vrms isolation. The HCPL2731V has a higher maximum output voltage (18V vs. 7V) and higher minimum current transfer ratio (500% vs. 300% @ 1.6mA). Both are obsolete.

Q: Are all substitute parts available in the same package? A: Yes. All listed substitutes use the 8-DIP (0.300", 7.62mm) through-hole package, ensuring mechanical compatibility with the HCPL-273L footprint.

Q: Which substitute should be selected for new production designs? A: For new designs requiring 2-channel, 3750Vrms isolation, no active substitute exists. For applications accepting 2500Vrms isolation, the onsemi parts are available but obsolete. For RoHS-compliant designs, the HCPL-270L-000E is the only active option, requiring a dual-device implementation for 2-channel functionality.