IL 716-3B Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 716-3B 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 with a data rate of 110MBd and utilizes Giant Magnetoresistive (GMR) technology. The IL 716-3B is classified as obsolete, making identification of functionally equivalent substitute components essential for ongoing system support, design updates, and procurement continuity.

Substiute Parts

IL 716-3B

NVE Corp/Isolation ProductsIn Stock: 1163IL 716-3B Datasheet

Current PartRFQ

HCPL-091J-000E

Broadcom LimitedIn Stock: 1666HCPL-091J-000E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IL 716-3B is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Isolation voltage: 2500Vrms
• Number of channels: 4
• Channel configuration: Unidirectional, 2 inputs and 2 outputs per side
• Data rate: 110MBd
• Propagation delay: 15ns maximum (tpLH / tpHL)
• Pulse width distortion: 3ns maximum
• Package type: 16-SOIC (0.154", 3.90mm Width)
• Operating temperature range: -55°C ~ 125°C
• Mounting type: Surface Mount

Allowable Variation Parameters:

• Common Mode Transient Immunity (CMTI): The IL 716-3B specifies 100kV/µs minimum. Substitute parts with lower CMTI ratings (such as 15kV/µs) do not meet the original specification and represent a functional downgrade in noise immunity performance.
• Supply voltage range: Variations within the 3V to 5.5V envelope are acceptable if the substitute operates within the system's actual supply voltage.
• RoHS and regulatory compliance status may differ between obsolete and active products.

The HCPL-091J-000E meets all mandatory matching parameters but exhibits reduced CMTI performance (15kV/µs versus 100kV/µs).

Parameter Comparison

Engineering Selection Recommendations

IL 716-3B (Obsolete): The IL 716-3B is classified as obsolete and is no longer in active production. While 1053 pieces are currently in stock, this component should be considered for end-of-life applications only. The part is RoHS non-compliant, which may present regulatory constraints in new designs or systems subject to environmental compliance requirements.

HCPL-091J-000E (Active Substitute): The HCPL-091J-000E is an active product manufactured by Broadcom Limited and is ROHS3 compliant. This component matches all critical functional parameters of the IL 716-3B with one exception: the Common Mode Transient Immunity is specified at 15kV/µs rather than 100kV/µs. This represents a 6.67:1 reduction in CMTI performance.

Selection Basis:

• For applications where the original 100kV/µs CMTI specification is mandatory, the HCPL-091J-000E does not provide equivalent performance.
• For applications where CMTI requirements are 15kV/µs or lower, the HCPL-091J-000E provides functional equivalence across all other parameters.
• The HCPL-091J-000E is preferred for new designs due to active product status and RoHS3 compliance.
• Existing designs using the IL 716-3B should evaluate whether the reduced CMTI of the HCPL-091J-000E is acceptable for the specific application environment and noise conditions.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-091J-000E directly replace the IL 716-3B in existing designs?

A: Pin-to-pin and package compatibility is confirmed (both use 16-SOIC). However, the CMTI specification difference (15kV/µs versus 100kV/µs) must be evaluated. If the original design relied on the 100kV/µs CMTI specification for noise immunity in high-speed switching environments, the substitute may not provide equivalent performance.

Q: What does the CMTI difference mean in practical terms?

A: Common Mode Transient Immunity (CMTI) measures the isolator's ability to maintain signal integrity when the common-mode voltage between isolated sides changes rapidly. The IL 716-3B tolerates common-mode voltage slew rates up to 100kV/µs, while the HCPL-091J-000E tolerates up to 15kV/µs. Applications with slower common-mode transitions will not be affected by this difference.

Q: Are there any package or pinout differences?

A: Both parts use the 16-SOIC (0.154", 3.90mm Width) package with identical physical dimensions and mounting requirements. Pinout compatibility should be verified against the respective datasheets before implementation.

Q: Why is the IL 716-3B obsolete?

A: The IL 716-3B is classified as obsolete by the manufacturer. This typically indicates that the product has been discontinued and is no longer in active production. Existing inventory may be available through authorized distributors, but long-term availability cannot be guaranteed.

Q: Does the HCPL-091J-000E offer any advantages over the IL 716-3B?

A: The HCPL-091J-000E is an active product with ROHS3 compliance, making it suitable for new designs and systems subject to environmental regulations. It maintains equivalent data rate, propagation delay, and isolation voltage specifications. The primary trade-off is the reduced CMTI specification.

Q: What is the supply voltage compatibility between these parts?

A: Both parts operate within the 3V to 5.5V range. The IL 716-3B specifies dual ranges (3V ~ 5.5V and 4.5V ~ 5.5V), while the HCPL-091J-000E specifies 3V ~ 5.5V. Both are compatible with standard 3.3V and 5V logic supply systems.

Q: Are there any regulatory or compliance differences?

A: The IL 716-3B is RoHS non-compliant, while the HCPL-091J-000E is ROHS3 compliant. Both are REACH unaffected. For applications subject to RoHS requirements, the HCPL-091J-000E is the appropriate choice.