IL 485W RS422/RS485 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 485W 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 485W is classified as an Active product with full production support and availability.

Substitute parts are identified when equivalent electrical performance, isolation characteristics, and mechanical compatibility are maintained across the specified parameter range. The IL 485W operates as a 4-channel unidirectional isolator with 2500Vrms isolation voltage, suitable for industrial RS422/RS485 communication applications requiring high common mode transient immunity.

Substiute Parts

IL 485W

NVE Corp/Isolation ProductsIn Stock: 1142IL 485W Datasheet

Current PartRFQ

IL 485WE

NVE Corp/Isolation ProductsIn Stock: 1471IL 485WE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IL 485W is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Isolation voltage: 2500Vrms (exact match required)
• Number of channels: 4 channels (exact match required)
• Channel configuration: 2 inputs / 2 outputs per side (exact match required)
• Data rate: 35Mbps minimum (exact match required)
• Common mode transient immunity: 20kV/µs minimum (exact match required)
• Propagation delay: 32ns maximum for both tpLH and tpHL (exact match required)
• Supply voltage range: 4.5V to 5.5V (exact match required)
• Operating temperature range: −40°C to +100°C (exact match required)

Mechanical Equivalence Criteria:

• Package type: 16-SOIC (0.295", 7.50mm Width) (exact match required)
• Mounting type: Surface Mount (exact match required)

Technology Basis:

• Technology platform: GMR (Giant Magnetoresistive) isolator architecture
• Series designation: IsoLoop® family

Substitute parts must maintain identical functional performance within the specified electrical and thermal operating envelope. Packaging differences (such as tube versus tape-and-reel) do not affect electrical substitutability but may impact procurement and assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

IL 485W (Original Part Number)

The IL 485W is an Active product with full manufacturer support. This part number is suitable for applications where RoHS non-compliant components are acceptable within the design and regulatory framework. Current inventory status shows 1054 pieces in stock.

IL 485WE (Substitute Part Number)

The IL 485WE is functionally and electrically identical to the IL 485W across all critical performance parameters. The primary distinction is RoHS3 compliance status. The IL 485WE is the appropriate selection for applications subject to RoHS3 regulatory requirements or design standards mandating lead-free component qualification. Current inventory status shows 1452 pieces in stock.

Both parts maintain identical electrical performance, thermal operating range, isolation characteristics, and mechanical compatibility. Selection between IL 485W and IL 485WE depends solely on regulatory compliance requirements and supply chain constraints. Packaging format (tube for IL 485WE) does not affect electrical substitutability.

Frequently Asked Questions (FAQ)

Q: Can IL 485WE be used as a direct replacement for IL 485W in existing designs?

A: Yes. The IL 485WE is electrically and mechanically identical to the IL 485W. All electrical parameters, including isolation voltage, data rate, propagation delay, and operating temperature range, are equivalent. Direct substitution is valid from a functional standpoint. Regulatory compliance differences (RoHS3 status) may influence design approval workflows.

Q: What is the difference between IL 485W and IL 485WE?

A: The IL 485W and IL 485WE differ in two non-functional aspects: packaging format and RoHS compliance status. The IL 485W is supplied in standard packaging and is RoHS non-compliant. The IL 485WE is supplied in tube packaging and is ROHS3 compliant. All electrical and thermal specifications are identical.

Q: Are there any performance differences between these part numbers?

A: No. Both IL 485W and IL 485WE deliver identical electrical performance. Propagation delay, data rate, isolation voltage, common mode transient immunity, and all other electrical parameters are equivalent. Performance differences do not exist between these variants.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS3 compliance, specify IL 485WE. For applications without RoHS3 requirements, either part is acceptable. Consult design standards and regulatory frameworks applicable to the end application.

Q: Is the 16-SOIC package identical for both parts?

A: Yes. Both IL 485W and IL 485WE use the 16-SOIC (0.295", 7.50mm Width) package. PCB footprint, pin configuration, and mechanical dimensions are identical. No layout or assembly modifications are required when substituting between these parts.

Q: What is the isolation voltage rating for these parts?

A: Both IL 485W and IL 485WE provide 2500Vrms galvanic isolation. This isolation voltage is maintained across the full operating temperature range of −40°C to +100°C.

Q: What is the maximum data rate supported?

A: Both parts support a maximum data rate of 35Mbps. This specification applies to RS422 and RS485 communication protocols.

Q: What is the common mode transient immunity (CMTI) specification?

A: Both IL 485W and IL 485WE provide a minimum common mode transient immunity of 20kV/µs. This specification defines the maximum rate of change of common mode voltage that the isolator can withstand without data corruption.

Q: Are these parts suitable for industrial temperature ranges?

A: Yes. Both parts operate across the temperature range of −40°C to +100°C, which encompasses industrial and extended commercial temperature specifications. Electrical parameters remain within specification across this entire range.

Q: What supply voltage is required?

A: Both IL 485W and IL 485WE require a supply voltage in the range of 4.5V to 5.5V. This specification applies to the isolated side of the device.