IL 712-3 General Purpose Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 712-3 is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, part of the IsoLoop® series. This component provides 2500Vrms isolation across 2 channels with 110Mbps data rate and 100kV/µs common mode transient immunity in an 8-SOIC surface mount package. The IL 712-3 is classified as Active product status. Substitute parts are identified based on matching electrical isolation specifications, channel configuration, data rate performance, and physical package compatibility to ensure functional equivalence in circuit applications.

Substiute Parts

IL 712-3

NVE Corp/Isolation ProductsIn Stock: 1108IL 712-3 Datasheet

Current PartRFQ

IL 712-3E

NVE Corp/Isolation ProductsIn Stock: 6213IL 712-3E Datasheet

DirectRFQ

IL 711-3

NVE Corp/Isolation ProductsIn Stock: 1724IL 711-3 Datasheet

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IL 710-3

NVE Corp/Isolation ProductsIn Stock: 1114IL 710-3 Datasheet

Parametric EquivalentRFQ

IL 710-3E

NVE Corp/Isolation ProductsIn Stock: 23649IL 710-3E Datasheet

Parametric EquivalentRFQ

IL 721-3E

NVE Corp/Isolation ProductsIn Stock: 6356IL 721-3E Datasheet

Parametric EquivalentRFQ

HCPL-0931

Broadcom LimitedIn Stock: 116850HCPL-0931 Datasheet

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SI8421AB-C-IS

Skyworks Solutions Inc.In Stock: 5242SI8421AB-C-IS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IL 712-3 are classified into three categories based on electrical and mechanical compatibility:

Direct Packaging Equivalent: IL 712-3E differs only in packaging format (Tube vs. standard) and RoHS compliance status while maintaining identical electrical specifications and channel configuration.

Similar Channel Configuration: IL 711-3 and IL 721-3E maintain the 2-channel architecture and 2500Vrms isolation specification. IL 711-3 differs in input configuration (2/0 vs. 1/1). IL 721-3E provides identical electrical performance with RoHS3 compliance.

Parametric Equivalents with Channel Reduction: IL 710-3 and IL 710-3E provide single-channel isolation with identical voltage rating, data rate, and CMTI specifications. These parts are suitable for applications requiring only one isolation channel.

Cross-Manufacturer Alternatives: HCPL-0931 (Broadcom) and SI8421AB-C-IS (Skyworks) provide 2500Vrms 2-channel isolation in the same package footprint. HCPL-0931 uses GMR technology with 15kV/µs CMTI. SI8421AB-C-IS uses capacitive coupling technology with reduced data rate (1Mbps) and is marked Not For New Designs.

Substitution eligibility is determined by: isolation voltage rating, number of channels, channel input/output configuration, data rate capability, CMTI performance, supply voltage range, package type, and operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Identical Functionality):

IL 712-3E is the direct equivalent with identical electrical specifications and channel configuration. Selection between IL 712-3 and IL 712-3E depends on RoHS compliance requirements. IL 712-3E carries ROHS3 compliance certification, while IL 712-3 is RoHS non-compliant. Both maintain Active product status and identical performance characteristics.

Same-Manufacturer Alternatives (NVE IsoLoop® Series):

IL 721-3E provides identical 2-channel, 2500Vrms isolation with matching electrical performance and carries ROHS3 compliance. IL 710-3E offers single-channel isolation with equivalent voltage rating and data rate, suitable for applications requiring only one isolation channel. Both are Active products with ROHS3 compliance.

IL 711-3 provides 2-channel isolation with different input configuration (2/0 vs. 1/1) and is RoHS non-compliant. IL 710-3 is the non-compliant variant of the single-channel isolator.

Cross-Manufacturer Alternatives:

HCPL-0931 (Broadcom) maintains 2500Vrms 2-channel isolation with GMR technology but specifies 15kV/µs CMTI (lower than IL 712-3's 100kV/µs). Operating temperature range extends to -55°C to 125°C. Product status is Active. RoHS non-compliant.

SI8421AB-C-IS (Skyworks) provides 2500Vrms 2-channel isolation using capacitive coupling technology. Data rate is limited to 1Mbps (versus 110Mbps for IL 712-3), and CMTI is 25kV/µs (typical). Product status is Not For New Designs. ROHS3 compliant. This part is unsuitable for new circuit designs.

Compliance Considerations:

For RoHS3-compliant designs, select IL 712-3E, IL 710-3E, IL 721-3E, or SI8421AB-C-IS. For non-compliant applications, IL 712-3, IL 711-3, IL 710-3, and HCPL-0931 are available.

Performance Constraints:

SI8421AB-C-IS is not suitable for applications requiring 110Mbps data rate or 100kV/µs CMTI performance. HCPL-0931 is not suitable for applications requiring CMTI greater than 15kV/µs.

Frequently Asked Questions (FAQ)

Q: Can IL 712-3E be used as a direct replacement for IL 712-3?

A: Yes. IL 712-3E is electrically and functionally identical to IL 712-3. The only differences are packaging format (Tube) and RoHS compliance status (ROHS3 Compliant vs. Non-compliant). Pin configuration, electrical performance, and package footprint are identical.

Q: What is the difference between IL 712-3 and IL 711-3?

A: Both provide 2500Vrms 2-channel isolation with 110Mbps data rate. The key difference is input configuration: IL 712-3 has 1 input on each side (1/1), while IL 711-3 has 2 inputs on side 1 and 0 inputs on side 2 (2/0). This affects circuit topology and signal routing requirements.

Q: Can IL 710-3E replace IL 712-3 in my application?

A: IL 710-3E can replace IL 712-3 only if your circuit requires isolation on a single channel. IL 710-3E provides 1-channel isolation versus IL 712-3's 2-channel isolation. All other electrical parameters (voltage, data rate, CMTI, supply voltage, temperature range) are identical. Package footprint is the same.

Q: Why is SI8421AB-C-IS marked "Not For New Designs"?

A: SI8421AB-C-IS carries a Not For New Designs product status designation. This indicates the manufacturer is discontinuing or has discontinued active development and support for this part. New circuit designs should not incorporate this component. Existing designs using SI8421AB-C-IS may continue to source available inventory.

Q: What are the key differences between IL 712-3 and HCPL-0931?

A: Both provide 2500Vrms 2-channel isolation in 8-SOIC packages with 110Mbps/110MBd data rate. Key differences: HCPL-0931 specifies 15kV/µs CMTI (versus IL 712-3's 100kV/µs), operates across -55°C to 125°C (versus -40°C to 100°C), and is manufactured by Broadcom using GMR technology. HCPL-0931 is not suitable for applications requiring high CMTI performance.

Q: Are all substitute parts pin-compatible with IL 712-3?

A: All listed substitute parts use the 8-SOIC (0.154", 3.90mm Width) package. Physical footprint and pin count are identical. However, pin functionality differs based on channel configuration. IL 710-3 and IL 710-3E have different pin assignments due to single-channel architecture. Verify pinout diagrams before substitution.

Q: Which substitute part offers the best RoHS compliance?

A: IL 712-3E, IL 710-3E, IL 721-3E, and SI8421AB-C-IS all carry ROHS3 Compliant certification. For RoHS-compliant designs, these four parts are suitable. IL 712-3, IL 711-3, IL 710-3, and HCPL-0931 are RoHS non-compliant.

Q: Can HCPL-0931 be used in high-speed switching applications?

A: HCPL-0931 supports 110MBd data rate with 15ns propagation delay, matching IL 712-3's speed. However, HCPL-0931's 15kV/µs CMTI is significantly lower than IL 712-3's 100kV/µs. In applications with high common-mode voltage slew rates, HCPL-0931 may not provide adequate noise immunity. Evaluate CMTI requirements before substitution.

Q: What is the inventory status of substitute parts?

A: IL 712-3E has 6134 units in stock. IL 710-3E has the highest inventory at 23568 units. IL 721-3E has 6323 units. HCPL-0931 has 116771 units available. SI8421AB-C-IS has 5188 units. IL 711-3 has 1696 units. IL 710-3 has 1084 units. IL 712-3 has 998 units in stock.