IL 717-3B General Purpose Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 717-3B is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, featuring 2500Vrms isolation voltage, 4 channels, and 110MBd data rate in a 16-SOIC surface mount package. This component utilizes Giant Magnetoresistive (GMR) technology for signal isolation across galvanic barriers.

The IL 717-3B is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this isolator topology.

Substiute Parts

IL 717-3B

NVE Corp/Isolation ProductsIn Stock: 1090IL 717-3B Datasheet

Current PartRFQ

HCPL-092J

Broadcom LimitedIn Stock: 2171HCPL-092J Datasheet

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HCPL-092J-500E

Broadcom LimitedIn Stock: 3330HCPL-092J-500E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IL 717-3B is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Isolation voltage: 2500Vrms
• Number of channels: 4
• Channel configuration: 3 inputs / 1 output unidirectional
• Data rate: 110MBd
• Package type: 16-SOIC (0.154", 3.90mm Width)
• Operating temperature range: -55°C ~ 125°C
• Propagation delay: 15ns maximum (both tpLH and tpHL)
• Pulse width distortion: 3ns maximum
• Supply voltage compatibility: 3V ~ 5.5V operation

Acceptable Parameter Variations:

• Common Mode Transient Immunity (CMTI): The IL 717-3B specifies 100kV/µs minimum. Substitute parts with lower CMTI ratings (15kV/µs) remain functionally compatible as they represent reduced performance in this parameter, not incompatibility.
• Packaging format: Tube versus Cut Tape (CT) & Digi-Reel® represents logistics variation only and does not affect electrical or mechanical compatibility.
• RoHS compliance status: Compliance improvements (RoHS3 Compliant versus RoHS non-compliant) do not prevent substitution.
• Product status: Active status substitutes are preferred over obsolete parts for supply continuity.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: HCPL-092J-500E

The HCPL-092J-500E is the preferred substitute for the IL 717-3B. This part maintains full electrical and mechanical compatibility across all critical parameters: 2500Vrms isolation, 4-channel 3/1 unidirectional configuration, 110MBd data rate, 15ns propagation delay, and 16-SOIC package. The HCPL-092J-500E is manufactured by Broadcom Limited with active product status, ensuring long-term supply availability. This part achieves RoHS3 compliance, representing an improvement in environmental and regulatory standing compared to the obsolete IL 717-3B. Packaging is provided in Cut Tape (CT) & Digi-Reel® format with 3300 pieces currently in stock.

Secondary Substitute: HCPL-092J

The HCPL-092J is an alternative substitute with identical electrical specifications to the HCPL-092J-500E. This part differs only in packaging format (Tube versus Cut Tape & Digi-Reel®) and maintains RoHS non-compliant status. The HCPL-092J is suitable for applications where RoHS3 compliance is not required and tube packaging is acceptable. Current inventory is 2100 pieces.

CMTI Parameter Consideration:

Both substitute parts specify 15kV/µs CMTI, compared to the IL 717-3B specification of 100kV/µs. This represents a reduction in common mode transient immunity performance. Applications requiring the higher 100kV/µs CMTI specification of the original part must evaluate whether the 15kV/µs rating of the substitutes is acceptable for the specific system environment and noise conditions.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-092J-500E directly replace the IL 717-3B without circuit modifications?

A: Yes. The HCPL-092J-500E maintains identical electrical and mechanical specifications across all critical parameters: isolation voltage, channel count and configuration, data rate, propagation delay, pulse width distortion, supply voltage range, operating temperature, and 16-SOIC package dimensions. Direct pin-for-pin substitution is supported without circuit redesign.

Q: What is the significance of the CMTI difference between the IL 717-3B (100kV/µs) and the substitute parts (15kV/µs)?

A: Common Mode Transient Immunity (CMTI) defines the maximum rate of change of common mode voltage that the isolator can tolerate without introducing errors. The IL 717-3B specifies 100kV/µs, while the HCPL-092J and HCPL-092J-500E specify 15kV/µs. This difference indicates reduced immunity to rapid voltage transients in the substitute parts. Applications operating in high-noise environments with fast voltage transitions must evaluate whether 15kV/µs is sufficient. In typical industrial and consumer applications with standard isolation barrier transients, the 15kV/µs rating is generally adequate.

Q: What is the difference between HCPL-092J and HCPL-092J-500E?

A: The electrical and mechanical specifications are identical. The differences are: (1) Packaging format: HCPL-092J is supplied in Tube; HCPL-092J-500E is supplied in Cut Tape (CT) & Digi-Reel®. (2) RoHS compliance: HCPL-092J is RoHS non-compliant; HCPL-092J-500E is RoHS3 compliant. (3) Inventory: HCPL-092J has 2100 pieces in stock; HCPL-092J-500E has 3300 pieces in stock. Selection between these two depends on packaging requirements and regulatory compliance mandates.

Q: Why is the IL 717-3B classified as obsolete?

A: The IL 717-3B is an older design from NVE Corp/Isolation Products. Broadcom Limited's HCPL-092 series represents the current generation of equivalent isolators with active product status, ensuring ongoing manufacturing support, supply availability, and compliance with current regulatory standards.

Q: Are there any pin-out differences between the IL 717-3B and the substitute parts?

A: No. All three parts use the 16-SOIC (0.154", 3.90mm Width) package with identical channel configuration (3 inputs on Side 1, 1 output on Side 2). Pin assignments are compatible for direct substitution.

Q: What is the MSL (Moisture Sensitivity Level) rating, and why is it relevant?

A: All three parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions. These components can be stored and handled without special moisture control measures, simplifying logistics and inventory management.

Q: Can the substitute parts operate across the full -55°C to 125°C temperature range?

A: Yes. Both HCPL-092J and HCPL-092J-500E maintain the full -55°C to 125°C operating temperature range, matching the IL 717-3B specification. This ensures compatibility in industrial, automotive, and extended-temperature applications.

Q: What supply voltage ranges are supported?

A: The IL 717-3B supports dual supply ranges: 3V ~ 5.5V and 4.5V ~ 5.5V. The substitute parts (HCPL-092J and HCPL-092J-500E) support 3V ~ 5.5V operation. This range encompasses standard 3.3V and 5V logic supply voltages used in digital systems.