IL 485 RS422/RS485 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 485 is an active RS422/RS485 digital isolator manufactured by NVE Corp/Isolation Products, utilizing Giant Magnetoresistive (GMR) technology. This component provides galvanic isolation for serial communication interfaces with 2500Vrms isolation voltage and 3-channel configuration. The IL 485 is classified as an Active product status component.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the allowed parameter specifications for RS422/RS485 digital isolator applications. Substitution becomes necessary due to inventory availability, packaging requirements, compliance certifications, or enhanced performance specifications.

Substiute Parts

IL 485

NVE Corp/Isolation ProductsIn Stock: 811IL 485 Datasheet

Current PartRFQ

IL 485E

NVE Corp/Isolation ProductsIn Stock: 10308IL 485E Datasheet

DirectRFQ

IL 3585E

NVE Corp/Isolation ProductsIn Stock: 7906IL 3585E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IL 485 are classified into two categories based on electrical and mechanical compatibility:

Direct Substitute (IL 485E): Maintains identical electrical specifications including 35Mbps data rate, 20kV/µs CMTI, and 2500Vrms isolation voltage. Package dimensions and pin configuration are equivalent. The primary distinction is packaging format (Tube) and RoHS3 compliance status.

Similar Substitute (IL 3585E): Shares core isolation voltage (2500Vrms), channel configuration (3 channels), and supply voltage range. Enhanced performance specifications include 40Mbps data rate and 30kV/µs CMTI. Package case designation differs (16-SOIC 0.154" vs. 0.295" width), and operating temperature range is reduced to -40°C ~ 85°C.

Substitution eligibility is determined by:

• Isolation voltage rating (2500Vrms minimum)
• Channel count and configuration (3 channels, 2/1 input distribution)
• RS422/RS485 protocol support
• Supply voltage compatibility (3V ~ 5.5V overlap)
• Surface mount 16-SOIC package format
• GMR technology platform

Parameter Comparison

Engineering Selection Recommendations

IL 485E Selection Criteria: IL 485E is a direct functional equivalent with identical electrical performance specifications. Selection of IL 485E is appropriate when ROHS3 compliance is required for end-product certification. Packaging format (Tube) and inventory availability (10,201 pieces) support high-volume production requirements. Operating temperature range (-40°C ~ 100°C) matches the original specification, ensuring thermal performance equivalence in all operating environments.

IL 3585E Selection Criteria: IL 3585E is suitable for applications requiring enhanced performance specifications. The 40Mbps data rate and 30kV/µs CMTI provide margin above the IL 485 baseline performance. ROHS3 compliance status aligns with modern regulatory requirements. Selection of IL 3585E requires verification that the reduced operating temperature maximum (-40°C ~ 85°C) is compatible with the target application environment. Package case dimensions (0.154" width vs. 0.295" width) differ significantly; PCB layout and footprint compatibility must be confirmed before substitution.

Compliance Considerations: IL 485 is RoHS non-compliant. Both IL 485E and IL 3585E are ROHS3 compliant. Applications subject to RoHS directives or customer compliance requirements must utilize IL 485E or IL 3585E. All three parts maintain REACH Unaffected status and identical ECCN/HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can IL 485E be used as a direct replacement for IL 485 in existing designs? A: IL 485E maintains identical electrical specifications (35Mbps data rate, 20kV/µs CMTI, 2500Vrms isolation) and package dimensions (16-SOIC 0.295" width). Direct substitution is electrically and mechanically compatible. The primary difference is RoHS3 compliance status of IL 485E versus non-compliance of IL 485.

Q: What are the key differences between IL 485E and IL 3585E? A: IL 485E and IL 3585E differ in three parameters: data rate (35Mbps vs. 40Mbps), common mode transient immunity (20kV/µs vs. 30kV/µs), and package width (0.295" vs. 0.154"). Operating temperature range also differs (-40°C ~ 100°C vs. -40°C ~ 85°C). Both maintain 2500Vrms isolation voltage and 3-channel configuration.

Q: Is IL 3585E suitable for high-temperature applications? A: IL 3585E operating temperature range is -40°C ~ 85°C, which is 15°C lower than IL 485 (-40°C ~ 100°C). Applications requiring operation above 85°C must use IL 485 or IL 485E. Verify thermal requirements before selecting IL 3585E.

Q: Does package size difference affect PCB layout compatibility? A: IL 3585E uses a narrower 16-SOIC package (0.154" width) compared to IL 485/IL 485E (0.295" width). Footprint dimensions differ significantly. PCB layout, trace routing, and component placement must be re-evaluated. Direct footprint substitution is not possible without PCB redesign.

Q: Are all three parts suitable for RS422 and RS485 applications? A: All three parts (IL 485, IL 485E, IL 3585E) support both RS422 and RS485 protocols with identical 3-channel, 2/1 input configuration and unidirectional channel type. Protocol compatibility is maintained across all substitutes.

Q: What is the significance of RoHS3 compliance? A: IL 485E and IL 3585E are ROHS3 compliant; IL 485 is not. RoHS3 compliance is required for products sold in European Union markets and for many OEM customers. If RoHS compliance is mandatory, IL 485 cannot be used; IL 485E or IL 3585E must be selected.

Q: Can IL 3585E be used in applications designed for IL 485 without performance degradation? A: IL 3585E provides enhanced performance (40Mbps vs. 35Mbps, 30kV/µs vs. 20kV/µs CMTI). These improvements are backward compatible with IL 485 designs. However, the reduced operating temperature range (-40°C ~ 85°C) and different package dimensions require application verification before substitution.