IL 485-3V RS422/RS485 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 485-3V is a RS422/RS485 digital isolator manufactured by NVE Corp/Isolation Products, utilizing GMR (Giant Magnetoresistive) technology. This component provides 2500Vrms isolation for industrial communication applications requiring robust noise immunity and galvanic separation. The IL 485-3V is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

IL 485-3V

NVE Corp/Isolation ProductsIn Stock: 889IL 485-3V Datasheet

Current PartRFQ

IL 485

NVE Corp/Isolation ProductsIn Stock: 811IL 485 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IL 485-3V is determined by strict equivalence across the following critical parameters:

Isolation Technology & Performance: GMR-based isolation at 2500Vrms with 20kV/µs CMTI ensures electromagnetic compatibility in industrial RS422/RS485 networks.

Channel Configuration: 3-channel architecture with 2 inputs on Side 1 and 1 input on Side 2 (unidirectional channel type) defines the signal routing topology.

Electrical Specifications: 35Mbps data rate, 32ns maximum propagation delay, and 3V to 5.5V supply voltage range establish functional performance boundaries.

Physical Form Factor: 16-SOIC surface mount package with 0.295" (7.50mm) width ensures PCB layout compatibility.

Environmental Compliance: Operating temperature range of -40°C to 100°C and MSL 1 rating define reliability parameters.

The IL 485 (base part number without the -3V suffix) serves as the direct active equivalent, maintaining identical electrical and mechanical specifications while offering current product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: IL 485

The IL 485 is the direct functional equivalent of the IL 485-3V. Both components share identical electrical performance specifications, mechanical packaging, and isolation characteristics. The IL 485 maintains active product status with current manufacturing support, making it the preferred selection for new designs and component replenishment.

Compliance Considerations: Both the IL 485-3V and IL 485 carry identical RoHS non-compliant and REACH Unaffected designations. Design teams must account for these compliance statuses in applications subject to regulatory requirements.

Availability & Supply Chain: The IL 485 offers superior long-term availability with active inventory status, reducing supply chain risk compared to the obsolete IL 485-3V.

Pin-for-Pin Compatibility: Identical 16-SOIC package geometry and pinout enable direct PCB substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the IL 485 directly replace the IL 485-3V in existing designs?

A: Yes. The IL 485 is electrically and mechanically identical to the IL 485-3V. Both components feature the same 16-SOIC package, pinout, isolation voltage, data rate, and supply voltage specifications. Direct substitution on existing PCBs is supported without design changes.

Q: What is the difference between IL 485-3V and IL 485?

A: The primary difference is product status. The IL 485-3V is classified as obsolete, while the IL 485 maintains active status. The "-3V" suffix in the IL 485-3V designation indicates a specific supply voltage variant, but both parts share identical electrical and mechanical specifications. The IL 485 represents the current production equivalent.

Q: Are there any package or pinout differences?

A: No. Both components use the 16-SOIC (0.295", 7.50mm Width) surface mount package with identical pinout and mechanical dimensions. PCB footprints are fully compatible.

Q: What isolation voltage does this component provide?

A: Both the IL 485-3V and IL 485 provide 2500Vrms galvanic isolation, suitable for industrial RS422/RS485 communication networks requiring robust noise immunity and ground separation.

Q: What is the maximum data rate?

A: Both components support 35Mbps data rate, appropriate for standard RS422/RS485 industrial communication protocols.

Q: Are these components RoHS compliant?

A: No. Both the IL 485-3V and IL 485 are classified as RoHS non-compliant. Applications subject to RoHS regulations must account for this designation in component selection and supply chain planning.

Q: What is the operating temperature range?

A: Both components operate across -40°C to 100°C, supporting industrial and extended temperature applications.

Q: Can these components be used in new product designs?

A: The IL 485 is recommended for new designs due to its active product status and current manufacturing support. The IL 485-3V, being obsolete, should not be selected for new development.