IL 422-3V RS422/RS485 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 422-3V is a RS422/RS485 digital isolator manufactured by NVE Corp/Isolation Products, utilizing Giant Magnetoresistive (GMR) technology. This component provides 2500Vrms isolation for industrial communication applications requiring robust noise immunity and reliable data transmission in harsh environments.

The IL 422-3V is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to support legacy system maintenance, ensure design continuity, and maintain supply chain reliability for applications currently deployed with this isolator.

Substiute Parts

IL 422-3V

NVE Corp/Isolation ProductsIn Stock: 769IL 422-3V Datasheet

Current PartRFQ

IL 422

NVE Corp/Isolation ProductsIn Stock: 801IL 422 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IL 422-3V is determined by strict equivalence across the following critical parameters:

Isolation and Signal Integrity:

• Voltage isolation rating: 2500Vrms
• Common Mode Transient Immunity: 20kV/µs minimum
• Data rate capability: 25Mbps

Functional Architecture:

• RS422/RS485 protocol support
• 3-channel configuration
• 2/1 input distribution (Side 1/Side 2)
• Unidirectional channel type

Electrical Specifications:

• Supply voltage range: 3V ~ 5.5V and 4.5V ~ 5.5V
• Propagation delay: 32ns maximum (both rising and falling edges)
• Rise/fall time: 8ns typical
• Operating temperature: -40°C ~ 100°C

Physical and Manufacturing:

• Package: 16-SOIC (0.295", 7.50mm Width)
• Surface mount technology
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts must match all parameters listed above to ensure functional and mechanical compatibility without design modification.

Parameter Comparison

Engineering Selection Recommendations

IL 422 (Base Part Number)

The IL 422 is the direct substitute for the IL 422-3V. Both parts share identical electrical specifications, isolation ratings, channel configuration, and package geometry. The IL 422 carries Active product status, ensuring ongoing manufacturer support and availability. This part is recommended as the primary replacement for obsolete IL 422-3V units in new procurement and legacy system support.

IL 422E (Extended Temperature Variant)

The IL 422E is listed as an available substitute within the IL 422 product family. This variant maintains all core electrical and functional parameters of the IL 422-3V while potentially offering extended operational characteristics. Compatibility is confirmed across isolation voltage, data rate, channel architecture, and package specifications.

Compliance Considerations

Both substitute parts maintain RoHS non-compliant status consistent with the IL 422-3V. REACH status remains unaffected for all variants. Moisture Sensitivity Level 1 (Unlimited) applies uniformly across the product family, indicating no moisture-related handling restrictions during storage or assembly.

Supply Chain Status

The IL 422 (Active status) provides superior long-term availability compared to the obsolete IL 422-3V. Current inventory of 767 pieces supports immediate procurement requirements. Selection of the active variant ensures design continuity and reduces future obsolescence risk.

Frequently Asked Questions (FAQ)

Q: Can the IL 422 directly replace the IL 422-3V without PCB modifications?

A: Yes. The IL 422 and IL 422-3V are pin-compatible and functionally equivalent. Both use the 16-SOIC (0.295", 7.50mm Width) package with identical pinout. No PCB layout changes are required for substitution.

Q: What is the difference between IL 422-3V and IL 422?

A: The IL 422-3V is classified as obsolete, while the IL 422 carries active product status. All electrical specifications, isolation ratings, channel configurations, and performance parameters are identical. The primary distinction is manufacturer support and availability.

Q: Are IL 422 and IL 422E interchangeable?

A: Yes. Both parts maintain identical electrical specifications, isolation voltage (2500Vrms), data rate (25Mbps), channel configuration (3 channels, 2/1 input distribution), and package geometry (16-SOIC). The IL 422E designation indicates a variant within the same product family with equivalent functional performance.

Q: What isolation voltage does the IL 422-3V provide?

A: The IL 422-3V provides 2500Vrms isolation with a Common Mode Transient Immunity rating of 20kV/µs. This isolation level is maintained across all substitute parts (IL 422 and IL 422E).

Q: Is the IL 422-3V RoHS compliant?

A: No. The IL 422-3V is RoHS non-compliant. This status is consistent across all substitute parts in the IL 422 family. REACH status is unaffected for all variants.

Q: What is the maximum data rate supported by the IL 422-3V and its substitutes?

A: The maximum data rate is 25Mbps for the IL 422-3V, IL 422, and IL 422E. Propagation delay is 32ns maximum for both rising and falling edges, with typical rise/fall time of 8ns.

Q: What supply voltage range is required for the IL 422-3V?

A: The IL 422-3V operates across two supply voltage ranges: 3V ~ 5.5V and 4.5V ~ 5.5V. This dual-range specification is maintained in all substitute parts.

Q: What is the operating temperature range for the IL 422-3V?

A: The operating temperature range is -40°C ~ 100°C for the IL 422-3V and all substitute parts (IL 422, IL 422E).

Q: Does the IL 422-3V require isolated power?

A: No. The IL 422-3V does not include isolated power functionality. This specification is consistent across all substitute parts in the IL 422 family.

Q: What is the Moisture Sensitivity Level (MSL) for the IL 422-3V?

A: The Moisture Sensitivity Level is 1 (Unlimited), indicating no moisture-related handling restrictions during storage, transportation, or assembly processes.