HCPL-3700 Equivalent & Substitute Parts

Part Overview

The HCPL-3700 is an optoisolator with Darlington output designed for AC/DC to logic interface applications. Manufactured by Broadcom Limited, this component provides galvanic isolation rated at 3750Vrms across a single channel in an 8-DIP through-hole package. The part is currently active in production. Substitute parts may be required due to inventory constraints, packaging preferences, or compliance requirements specific to end-application specifications.

Substiute Parts

HCPL-3700

Broadcom LimitedIn Stock: 2139HCPL-3700 Datasheet

Current PartRFQ

HCPL-3700-000E

Broadcom LimitedIn Stock: 1726HCPL-3700-000E Datasheet

MFR RecommendedRFQ

HCPL3700

Fairchild SemiconductorIn Stock: 3342HCPL3700 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-3700 is determined by the following critical parameters:

• Package / Case: 8-DIP (0.300", 7.62mm) — mechanical compatibility requirement
• Mounting Type: Through Hole — PCB assembly method
• Number of Channels: 1 — functional requirement
• Output Type: Darlington — output stage configuration
• Input Type: AC, DC — input signal compatibility
• Voltage - Output (Max): 20V — maximum output voltage rating
• Current - Output / Channel: 30mA — output current capability
• Operating Temperature: -40°C ~ 85°C — thermal operating range

Substitute parts must maintain compatibility across these parameters. Variations in isolation voltage rating, switching times, or rise/fall times do not preclude substitution provided the substitute meets or exceeds the application requirements and maintains the same package footprint and pin configuration.

Parameter Comparison

Engineering Selection Recommendations

HCPL-3700-000E (Broadcom Limited) is the primary substitute for HCPL-3700. Both parts are manufactured by Broadcom Limited and share identical electrical and mechanical specifications. The HCPL-3700-000E is supplied in Tube packaging and carries ROHS3 compliance certification, whereas the base HCPL-3700 is RoHS non-compliant. Selection of HCPL-3700-000E is appropriate when RoHS3 compliance is a design or regulatory requirement.

HCPL3700 (Fairchild Semiconductor) is a secondary substitute option. This part maintains mechanical compatibility (8-DIP package, through-hole mounting) and functional equivalence (1 channel, Darlington output, 20V max output, 30mA output current, AC/DC input). The isolation voltage rating is 2500Vrms compared to 3750Vrms for the Broadcom variants, and switching characteristics differ (6µs/25µs turn-on/turn-off versus 4µs/10µs, and 45µs/0.5µs rise/fall versus 20µs/0.3µs). The Fairchild part is suitable for applications where the lower isolation rating and extended switching times are acceptable within system specifications.

Frequently Asked Questions (FAQ)

Q: Can HCPL-3700-000E be used as a direct replacement for HCPL-3700?

A: Yes. Both parts are manufactured by Broadcom Limited with identical electrical specifications, isolation voltage (3750Vrms), output characteristics (20V max, 30mA), switching times (4µs/10µs), and 8-DIP package configuration. The primary difference is packaging format (Tube versus unspecified) and RoHS compliance status (ROHS3 Compliant versus non-compliant).

Q: Is HCPL3700 from Fairchild Semiconductor compatible with HCPL-3700?

A: Mechanical and functional compatibility exists. Both use the 8-DIP through-hole package with identical pin configuration. However, the Fairchild part has a lower isolation voltage rating (2500Vrms versus 3750Vrms) and slower switching characteristics (6µs/25µs turn-on/turn-off and 45µs/0.5µs rise/fall time). Substitution is valid only if the application specifications permit these parameter variations.

Q: What are the critical parameters for substitution?

A: Package type (8-DIP), mounting method (through-hole), channel count (1), output stage type (Darlington), output voltage rating (20V max), output current (30mA), and input signal type (AC/DC) must remain constant. Isolation voltage, switching times, and rise/fall times may vary if application requirements allow.

Q: Does packaging format affect electrical performance?

A: No. Tube packaging (HCPL-3700-000E) and standard packaging (HCPL-3700) contain identical die and internal circuitry. Packaging format affects only handling, storage, and supply chain logistics, not electrical or thermal characteristics.

Q: Are there compliance differences between the substitute parts?

A: Yes. HCPL-3700-000E is ROHS3 compliant, while the base HCPL-3700 is RoHS non-compliant. Applications subject to RoHS regulations should specify HCPL-3700-000E. The Fairchild HCPL3700 compliance status is not specified in available documentation.