HCPL3700SDV Optoisolator Equivalent & Substitute Parts

Part Overview

The HCPL3700SDV 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, necessitating identification of functionally equivalent alternatives from active product lines for new designs and ongoing production support.

Key Parameters

Parameter	HCPL3700SDV
Manufacturer	onsemi
Voltage - Isolation	2500Vrms
Number of Channels	1
Output Type	Darlington
Voltage - Output (Max)	20V
Current - Output / Channel	30mA
Input Type	AC, DC
Turn On / Turn Off Time (Typ)	6µs, 25µs
Rise / Fall Time (Typ)	45µs, 0.5µs
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	8-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the HCPL3700SDV are selected based on the following critical parameters that determine functional equivalence:

Isolation Voltage: The HCPL3700SDV operates at 2500Vrms isolation. Substitute parts must maintain or exceed this isolation specification. All identified substitutes from the HCPL-3700 and HCPL-3760 series provide 3750Vrms isolation, which exceeds the original specification and is acceptable for direct substitution.

Output Configuration: Single-channel Darlington output with 20V maximum output voltage and 30mA output current per channel. All substitute parts maintain identical output specifications.

Input Type: AC/DC input capability is preserved across all substitute parts.

Operating Temperature Range: All substitutes maintain the -40°C to 85°C operating range.

Packaging and Mounting: The original part uses 8-SMD surface mount packaging. Substitute parts are available in 8-DIP Gull Wing configuration with equivalent surface mount mounting type and identical pin count.

Compliance: RoHS3 compliance is maintained in active substitute parts, with the exception of HCPL-3760#300 and HCPL-3760#500, which are RoHS non-compliant.

Parameter Comparison

Parameter	HCPL3700SDV	HCPL-3700-360E	HCPL-3700-560E	HCPL-3760#300	HCPL-3760#500	HCPL-3760-300E	HCPL-3760-360E	HCPL-3760-500E	HCPL-3760-560E
Manufacturer	onsemi	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Voltage - Isolation	2500Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms
Number of Channels	1	1	1	1	1	1	1	1	1
Output Type	Darlington	Darlington	Darlington	Darlington	Darlington	Darlington	Darlington	Darlington	Darlington
Voltage - Output (Max)	20V	20V	20V	20V	20V	20V	20V	20V	20V
Current - Output / Channel	30mA	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	AC, DC
Turn On / Turn Off Time (Typ)	6µs, 25µs	4µs, 10µs	4µs, 10µs	4.5µs, 8µs	4.5µs, 8µs	4.5µs, 8µs	4.5µs, 8µs	4.5µs, 8µs	4.5µs, 8µs
Rise / Fall Time (Typ)	45µs, 0.5µs	20µs, 0.3µs	20µs, 0.3µs	14µs, 0.4µs	14µs, 0.4µs	14µs, 0.4µs	14µs, 0.4µs	14µs, 0.4µs	14µs, 0.4µs
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	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SMD, Gull Wing	8-DIP, Gull Wing	8-DIP, Gull Wing	8-DIP, Gull Wing	8-DIP, Gull Wing	8-DIP, Gull Wing	8-DIP, Gull Wing	8-DIP, Gull Wing	8-DIP, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (HCPL-3700 Series):

HCPL-3700-360E and HCPL-3700-560E are direct functional replacements for the HCPL3700SDV. Both parts are manufactured by Broadcom Limited, maintain active product status, and carry ROHS3 compliance certification. These parts provide enhanced isolation voltage (3750Vrms versus 2500Vrms) and improved switching performance with faster turn-on/turn-off times and reduced rise/fall times. The HCPL-3700-360E is packaged in Tube format, while HCPL-3700-560E is supplied in Tape & Reel configuration.

Secondary Substitutes (HCPL-3760 Series):

HCPL-3760-300E, HCPL-3760-360E, HCPL-3760-500E, and HCPL-3760-560E provide equivalent electrical performance with identical output specifications and isolation voltage. All four variants are active products with ROHS3 compliance. The HCPL-3760 series offers marginally faster switching characteristics compared to the HCPL-3700 series. Packaging options include Tube (300E, 360E), Cut Tape & Digi-Reel (500E), and Tape & Reel (560E).

Non-Compliant Alternatives:

HCPL-3760#300 and HCPL-3760#500 are functionally equivalent but do not meet ROHS3 compliance requirements. These parts are suitable only for applications where RoHS compliance is not mandated.

Packaging Consideration:

The original HCPL3700SDV uses 8-SMD packaging. All substitute parts employ 8-DIP Gull Wing configuration. PCB layout modifications are required to accommodate the different package footprint. Pin-to-pin electrical compatibility is maintained across all substitutes.

Frequently Asked Questions (FAQ)

Q: Can HCPL-3700-360E and HCPL-3700-560E be used as direct replacements for HCPL3700SDV?

A: Yes. Both parts maintain identical electrical output specifications (20V maximum, 30mA per channel), single-channel Darlington configuration, and operating temperature range. The higher isolation voltage (3750Vrms) provides additional safety margin. PCB layout modification is required due to package format change from 8-SMD to 8-DIP Gull Wing.

Q: What is the difference between HCPL-3700 and HCPL-3760 series substitutes?

A: Both series provide equivalent isolation voltage (3750Vrms) and output specifications. The HCPL-3760 series exhibits faster switching performance with reduced turn-on/turn-off times (4.5µs/8µs versus 4µs/10µs) and lower rise/fall times (14µs/0.4µs versus 20µs/0.3µs). Selection between series depends on application timing requirements and packaging availability.

Q: Are all substitute parts RoHS3 compliant?

A: Six of eight substitute parts carry ROHS3 compliance certification: HCPL-3700-360E, HCPL-3700-560E, HCPL-3760-300E, HCPL-3760-360E, HCPL-3760-500E, and HCPL-3760-560E. HCPL-3760#300 and HCPL-3760#500 are RoHS non-compliant and should be avoided for applications requiring regulatory compliance.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are supplied in Tube, Tape & Reel (TR), and Cut Tape & Digi-Reel formats. HCPL-3700-360E and HCPL-3760-300E/360E are available in Tube packaging. HCPL-3700-560E, HCPL-3760#500, and HCPL-3760-560E use Tape & Reel format. HCPL-3760-500E is supplied in Cut Tape & Digi-Reel configuration. Selection depends on production volume and assembly requirements.

Q: Does the higher isolation voltage of substitute parts affect circuit design?

A: No. The 3750Vrms isolation rating of substitute parts exceeds the original 2500Vrms specification and is fully backward compatible. Applications designed for 2500Vrms isolation operate without modification at the higher isolation level.

Q: Are pin configurations identical between HCPL3700SDV and substitute parts?

A: Yes. All substitute parts maintain 8-pin configuration with identical pin assignments. Package format differs (8-SMD versus 8-DIP Gull Wing), requiring PCB footprint redesign but no circuit schematic changes.

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