IL 715-3B Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 715-3B is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, part of the IsoLoop® series. This component provides 2500Vrms isolation across 4 channels using Giant Magnetoresistive (GMR) technology. The IL 715-3B is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates at data rates up to 110MBd with 100kV/µs common mode transient immunity in a 16-SOIC (0.154", 3.90mm width) surface mount package.

Substiute Parts

IL 715-3B

NVE Corp/Isolation ProductsIn Stock: 1244IL 715-3B Datasheet

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IL 715-3E

NVE Corp/Isolation ProductsIn Stock: 8866IL 715-3E Datasheet

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HCPL-090J

Broadcom LimitedIn Stock: 1301HCPL-090J Datasheet

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HCPL-090J-500

Broadcom LimitedIn Stock: 669HCPL-090J-500 Datasheet

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HCPL-090J-500E

Broadcom LimitedIn Stock: 68996HCPL-090J-500E Datasheet

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HCPL-900J

Broadcom LimitedIn Stock: 90504HCPL-900J Datasheet

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HCPL-900J-000E

Broadcom LimitedIn Stock: 80369HCPL-900J-000E Datasheet

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HCPL-900J-500E

Broadcom LimitedIn Stock: 1187HCPL-900J-500E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the IL 715-3B is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Isolation voltage: 2500Vrms (mandatory match)
• Number of channels: 4 (mandatory match)
• Channel type: Unidirectional (mandatory match)
• Data rate: 110MBd (mandatory match)
• Propagation delay: 15ns maximum for both tpLH and tpHL (mandatory match)
• Pulse width distortion: 3ns maximum (mandatory match)
• Supply voltage range: 3V ~ 5.5V minimum (mandatory match)
• Operating temperature: Must support -55°C ~ 125°C range (mandatory match)

Mechanical Compatibility Requirements:

• Mounting type: Surface Mount (mandatory match)
• Package type: 16-SOIC (mandatory match)
• Package width: 0.154" (3.90mm) for direct pin-compatible substitution

Acceptable Variations:

• Common Mode Transient Immunity: 15kV/µs is acceptable as a lower specification than 100kV/µs
• Product status: Active parts are preferred over obsolete parts for new designs
• RoHS compliance: ROHS3 compliant parts are preferred but non-compliant parts remain functionally equivalent
• Packaging format: Tube, Tape & Reel, and Cut Tape formats are interchangeable for the same electrical part

Substitute parts from different manufacturers (Broadcom Limited HCPL series) are included when they meet all electrical and mechanical parameters. Package width variations (0.295", 7.50mm for HCPL-900 series) represent different physical form factors and are listed separately.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - Same Package Width (0.154", 3.90mm):

IL 715-3E is the direct NVE Corp equivalent with identical electrical specifications and package dimensions. This part is active and ROHS3 compliant, making it the preferred choice for designs requiring continuation of the IsoLoop® series. The operating temperature range is reduced to -40°C ~ 100°C, which must be evaluated against application requirements.

HCPL-090J-500E (Broadcom) provides cross-manufacturer compatibility with identical electrical performance and package dimensions. This part has the highest inventory availability (68,968 pcs) and ROHS3 compliance. The common mode transient immunity specification is 15kV/µs versus the IL 715-3B specification of 100kV/µs; this represents a lower specification and must be evaluated for application suitability.

Alternative Package Width (0.295", 7.50mm):

HCPL-900J-000E and HCPL-900J-500E are functionally equivalent but use a wider 16-SOIC package (0.295", 7.50mm). These parts are not pin-compatible with the IL 715-3B on standard PCBs designed for the narrower package. Selection of these parts requires PCB redesign or use of adapter solutions.

Compliance Considerations:

For applications requiring RoHS3 compliance, IL 715-3E, HCPL-090J-500E, HCPL-900J-000E, and HCPL-900J-500E are compliant options. For applications with no RoHS requirement, all listed parts remain functionally equivalent.

Temperature Range Considerations:

IL 715-3E operates at -40°C ~ 100°C, which is narrower than the IL 715-3B range of -55°C ~ 125°C. Applications requiring full -55°C ~ 125°C operation must use HCPL-090J, HCPL-090J-500E, HCPL-090J-500, HCPL-900J, HCPL-900J-000E, or HCPL-900J-500E.

Frequently Asked Questions (FAQ)

Q: Can IL 715-3E directly replace IL 715-3B in existing designs?

A: IL 715-3E is electrically and mechanically compatible with IL 715-3B for the same package width (0.154", 3.90mm). The operating temperature range is reduced from -55°C ~ 125°C to -40°C ~ 100°C. Verify that your application does not require operation below -40°C or above 100°C before substitution.

Q: What is the difference between HCPL-090J and HCPL-900J?

A: Both parts are Broadcom digital isolators with identical electrical specifications. The primary difference is package width: HCPL-090J uses 16-SOIC (0.154", 3.90mm) while HCPL-900J uses 16-SOIC (0.295", 7.50mm). HCPL-090J is pin-compatible with IL 715-3B; HCPL-900J requires PCB redesign.

Q: Why is the common mode transient immunity (CMTI) different between IL 715-3B and HCPL-090J?

A: IL 715-3B specifies 100kV/µs CMTI while HCPL-090J specifies 15kV/µs. Both values are provided specifications from the manufacturers. The HCPL-090J specification represents a lower performance threshold. Applications sensitive to high-speed common mode voltage changes must evaluate whether 15kV/µs is sufficient.

Q: Are HCPL-090J-500E and HCPL-090J-500 the same part?

A: Both parts are electrically identical but differ in packaging format. HCPL-090J-500E is supplied in Cut Tape & Digi-Reel® format, while HCPL-090J-500 is supplied in Tape & Reel format. Select based on your procurement and assembly process requirements.

Q: Can I use HCPL-090J-500E in applications requiring RoHS compliance?

A: Yes. HCPL-090J-500E is ROHS3 compliant. IL 715-3E is also ROHS3 compliant. Both parts meet RoHS3 requirements for new designs.

Q: What is the minimum operating temperature for IL 715-3E?

A: IL 715-3E operates from -40°C to 100°C. If your application requires operation at -55°C, you must select a substitute that supports the full -55°C ~ 125°C range, such as HCPL-090J-500E or HCPL-900J-000E.

Q: Are all listed substitute parts pin-compatible with IL 715-3B?

A: Parts with 16-SOIC (0.154", 3.90mm) package are pin-compatible: IL 715-3E, HCPL-090J, HCPL-090J-500E, and HCPL-090J-500. Parts with 16-SOIC (0.295", 7.50mm) package (HCPL-900J series) are not pin-compatible and require PCB redesign.

Q: Which substitute part has the highest inventory availability?

A: HCPL-090J-500E has the highest inventory with 68,968 pieces in stock, followed by HCPL-900J-000E with 80,300 pieces. However, HCPL-900J-000E uses a different package width and is not pin-compatible.