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HCPL3700SV Optoisolator Equivalent & Substitute Parts
Part Overview
The HCPL3700SV is a 2500Vrms Darlington output optoisolator manufactured by onsemi in 8-SMD surface mount packaging. This component provides galvanic isolation for single-channel applications with AC/DC input capability and 30mA output current. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | HCPL3700SV |
| Manufacturer | onsemi |
| Category | Optoisolators |
| Product Status | Obsolete |
| Number of Channels | 1 |
| Voltage - Isolation | 2500Vrms |
| Output Type | Darlington |
| Voltage - Output (Max) | 20V |
| Current - Output / Channel | 30mA |
| Input Type | AC, DC |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-SMD, Gull Wing |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the HCPL3700SV is determined by the following critical parameters:
- Number of Channels: Must be 1 channel
- Output Type: Must be Darlington
- Voltage - Output (Max): Must be 20V
- Current - Output / Channel: Must be 30mA
- Input Type: Must support AC, DC
- Operating Temperature Range: Must be -40°C ~ 85°C
- Mounting Type: Must be Surface Mount
- Package / Case: Must be 8-SMD, Gull Wing
Substitute parts are grouped into two categories:
MFR Recommended: HCPL3700SVM (onsemi) offers higher isolation voltage (5000Vrms) while maintaining all other electrical and mechanical specifications, providing enhanced performance for the same application space.
Similar Parts: HCPL-3700-360E, HCPL-3700-560E, HCPL-3760#300, HCPL-3760#500, HCPL-3760-300E, HCPL-3760-360E, HCPL-3760-500E, and HCPL-3760-560E (Broadcom Limited) provide 3750Vrms isolation with equivalent electrical performance and identical mechanical compatibility.
Parameter Comparison
| Parameter | HCPL3700SV (Main) | HCPL3700SVM (MFR Recommended) | HCPL-3700-360E | HCPL-3700-560E | HCPL-3760#300 | HCPL-3760-300E | HCPL-3760-500E | HCPL-3760-560E |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | onsemi | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited | Broadcom Limited |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
| Voltage - Isolation | 2500Vrms | 5000Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms | 3750Vrms |
| Number of Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Output Type | Darlington | Darlington | Darlington | Darlington | Darlington | Darlington | Darlington | Darlington |
| Voltage - Output (Max) | 20V | 20V | 20V | 20V | 20V | 20V | 20V | 20V |
| Current - Output / Channel | 30mA | 30mA | 30mA | 30mA | 30mA | 30mA | 30mA | 30mA |
| Input Type | AC, DC | AC, DC | AC, DC | AC, DC | AC, DC | AC, DC | AC, DC | AC, DC |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing | 8-SMD, Gull Wing |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| Turn On / Turn Off Time (Typ) | 6µs, 25µs | 6µs, 25µs | 4µs, 10µs | 4µs, 10µs | 4.5µs, 8µs | 4.5µs, 8µs | 4.5µs, 8µs | 4.5µs, 8µs |
| Rise / Fall Time (Typ) | 45µs, 0.5µs | 45µs, 0.5µs | 20µs, 0.3µs | 20µs, 0.3µs | 14µs, 0.4µs | 14µs, 0.4µs | 14µs, 0.4µs | 14µs, 0.4µs |
Engineering Selection Recommendations
Primary Recommendation: HCPL3700SVM
The HCPL3700SVM is the manufacturer-recommended substitute from onsemi. It maintains identical electrical and mechanical specifications to the HCPL3700SV while offering enhanced isolation voltage (5000Vrms versus 2500Vrms). The part is active in production, ROHS3 compliant, and provides direct functional compatibility with superior performance margin for isolation-critical applications.
Alternative Substitutes: Broadcom Limited HCPL-3700 and HCPL-3760 Series
The Broadcom HCPL-3700-360E and HCPL-3700-560E provide 3750Vrms isolation with improved switching characteristics (4µs turn-on, 10µs turn-off). Both are ROHS3 compliant and active in production.
The Broadcom HCPL-3760 series (HCPL-3760#300, HCPL-3760#500, HCPL-3760-300E, HCPL-3760-360E, HCPL-3760-500E, HCPL-3760-560E) offers 3750Vrms isolation with faster switching performance (4.5µs turn-on, 8µs turn-off). Most variants are ROHS3 compliant and active. HCPL-3760#300 and HCPL-3760#500 are RoHS non-compliant and should be avoided for new designs requiring regulatory compliance.
All substitute parts are available in multiple packaging options (Tube, Tape & Reel, Cut Tape & Digi-Reel) to accommodate different procurement and assembly requirements.
Frequently Asked Questions (FAQ)
Q: Can HCPL3700SVM be used as a direct replacement for HCPL3700SV?
A: Yes. The HCPL3700SVM maintains all electrical and mechanical specifications of the HCPL3700SV, including 1 channel, Darlington output, 20V maximum output voltage, 30mA output current, AC/DC input capability, and -40°C to 85°C operating temperature. The higher isolation voltage (5000Vrms) provides enhanced performance without requiring circuit modifications.
Q: What is the difference between onsemi and Broadcom substitute options?
A: The onsemi HCPL3700SVM is the manufacturer-recommended direct substitute. Broadcom alternatives (HCPL-3700 and HCPL-3760 series) provide equivalent isolation and output specifications but with improved switching characteristics. All maintain identical package, mounting type, and thermal operating range.
Q: Are there packaging differences between substitute parts?
A: Yes. Substitute parts are available in Tube, Tape & Reel (TR), and Cut Tape & Digi-Reel packaging. All maintain the same 8-SMD, Gull Wing physical form factor and are compatible with standard surface mount assembly processes.
Q: Which substitutes are RoHS compliant?
A: HCPL3700SVM, HCPL-3700-360E, HCPL-3700-560E, HCPL-3760-300E, HCPL-3760-360E, HCPL-3760-500E, and HCPL-3760-560E are ROHS3 compliant. HCPL-3760#300 and HCPL-3760#500 are RoHS non-compliant and unsuitable for applications requiring regulatory compliance.
Q: Do substitute parts have different switching performance?
A: Yes. The HCPL3700SV has turn-on/turn-off times of 6µs/25µs. Broadcom substitutes offer faster switching: HCPL-3700 series at 4µs/10µs and HCPL-3760 series at 4.5µs/8µs. The onsemi HCPL3700SVM maintains the original 6µs/25µs timing. Faster switching may benefit high-frequency applications but does not affect basic functional compatibility.
Q: Is the HCPL3700SV still available for procurement?
A: The HCPL3700SV is classified as obsolete. Active substitute parts should be used for new designs and ongoing procurement. Existing inventory may be available through authorized distributors.
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