IL 422 RS422/RS485 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 422 is an active RS422/RS485 digital isolator manufactured by NVE Corp/Isolation Products, part of the IsoLoop® series. This component provides galvanic isolation for serial communication interfaces using Giant Magnetoresistive (GMR) technology. The IL 422 is classified as an active product with 2500Vrms isolation voltage, 3-channel configuration, and 25Mbps data rate capability. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product family, enabling component selection flexibility based on packaging, compliance status, and inventory availability.

Substiute Parts

IL 422

NVE Corp/Isolation ProductsIn Stock: 801IL 422 Datasheet

Current PartRFQ

IL 422E

NVE Corp/Isolation ProductsIn Stock: 9472IL 422E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IL 422 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Isolation voltage: 2500Vrms
• Number of channels: 3
• Channel configuration: 2 inputs on Side 1, 1 input on Side 2 (unidirectional)
• Data rate: 25Mbps
• Common Mode Transient Immunity: 20kV/µs minimum
• Supply voltage range: 3V ~ 5.5V and 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 100°C

Mechanical Equivalence Requirements:

• Package type: 16-SOIC (0.295", 7.50mm Width)
• Mounting type: Surface Mount
• Technology: GMR (Giant Magnetoresistive)

Acceptable Variations:

• Packaging format (tube, tray, or reel)
• RoHS compliance status
• Inventory availability

The IL 422E qualifies as a direct substitute based on identical electrical specifications, mechanical form factor, and functional characteristics within the IsoLoop® product family.

Parameter Comparison

Engineering Selection Recommendations

IL 422 Selection Criteria: The IL 422 is appropriate for applications where RoHS non-compliant components are acceptable and packaging format is not a constraint. This variant maintains full electrical and functional equivalence to the IL 422E.

IL 422E Selection Criteria: The IL 422E is the preferred selection for applications requiring ROHS3 compliance. The IL 422E is supplied in tube packaging, which may be advantageous for automated assembly processes or specific inventory management requirements. All electrical parameters, isolation characteristics, and functional specifications remain identical to the IL 422.

Compliance Considerations: Selection between IL 422 and IL 422E should be based on regulatory requirements for the end application. The IL 422E provides ROHS3 compliance, while the IL 422 does not. Both variants maintain identical REACH and ECCN classifications.

Inventory and Availability: The IL 422E currently maintains higher inventory availability (9451 Pcs) compared to the IL 422 (767 Pcs). Component selection may be influenced by supply chain requirements and lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can IL 422E be used as a direct replacement for IL 422 in existing designs?

A: Yes. The IL 422E is electrically and mechanically equivalent to the IL 422. All functional parameters, isolation voltage, data rate, channel configuration, and package form factor are identical. The primary difference is RoHS compliance status and packaging format.

Q: What is the significance of the "E" designation in IL 422E?

A: The "E" designation indicates ROHS3 compliance. The IL 422E meets RoHS3 requirements, while the IL 422 does not. Both parts are functionally identical and share the same base product number (IL 422).

Q: Are there any timing or signal integrity differences between IL 422 and IL 422E?

A: No. Propagation delay (32ns maximum for both tpLH and tpHL), rise/fall time (8ns typical), and all other timing specifications are identical between the two variants.

Q: What packaging formats are available for these parts?

A: The IL 422 packaging format is not specified in the provided data. The IL 422E is supplied in tube packaging. Both use the 16-SOIC (0.295", 7.50mm Width) surface mount package.

Q: Are these parts suitable for high-speed RS422/RS485 applications?

A: Yes. Both IL 422 and IL 422E support 25Mbps data rate with 20kV/µs Common Mode Transient Immunity, making them suitable for industrial RS422/RS485 communication systems requiring galvanic isolation.

Q: What is the isolation voltage rating, and is it sufficient for industrial applications?

A: Both parts provide 2500Vrms isolation voltage, which is suitable for industrial applications requiring galvanic isolation between communication interfaces.

Q: Can these parts operate across the full industrial temperature range?

A: Yes. Both IL 422 and IL 422E operate across -40°C to 100°C, covering extended industrial temperature requirements.

Q: What supply voltage range do these isolators support?

A: Both parts support dual supply voltage ranges: 3V ~ 5.5V and 4.5V ~ 5.5V, providing flexibility for 3.3V and 5V logic systems.