IL 3285 RS422/RS485 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 3285 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 with a 2500Vrms isolation voltage rating and 15kV/µs common mode transient immunity. The IL 3285 operates at data rates up to 5Mbps and is housed in a 16-SOIC surface mount package.

The IL 3285 is classified as an active product. Substitute parts are identified based on matching electrical specifications, isolation technology, package configuration, and functional equivalence for RS422/RS485 communication applications.

Substiute Parts

IL 3285

NVE Corp/Isolation ProductsIn Stock: 837IL 3285 Datasheet

Current PartRFQ

IL 3285E

NVE Corp/Isolation ProductsIn Stock: 1044IL 3285E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IL 3285 are identified based on the following critical parameters that determine functional equivalence:

Electrical Equivalence Criteria:

• RS422/RS485 digital isolator type
• 2500Vrms isolation voltage
• 2-channel unidirectional configuration
• 5Mbps data rate capability
• 15kV/µs common mode transient immunity
• 12ns rise and fall time specifications
• Supply voltage range: 3V ~ 5.5V and 4.5V ~ 5.5V

Mechanical Equivalence Criteria:

• 16-SOIC (0.295", 7.50mm Width) package
• Surface mount mounting type

Technology Criteria:

• GMR (Giant Magnetoresistive) isolation technology
• IsoLoop® series designation

Parts meeting all these criteria are classified as direct substitutes and can be used interchangeably in applications designed for the IL 3285.

Parameter Comparison

Engineering Selection Recommendations

IL 3285 (RoHS Non-Compliant): Use the IL 3285 in applications where RoHS compliance is not required or where legacy component specifications are mandated. This part is suitable for industrial and commercial applications with no regulatory RoHS restrictions.

IL 3285E (ROHS3 Compliant): The IL 3285E is the preferred substitute for new designs and applications requiring ROHS3 compliance. This variant meets current environmental and regulatory standards while maintaining identical electrical and mechanical specifications. The IL 3285E is suitable for consumer electronics, automotive, and regulated industrial applications.

Both parts share identical electrical performance, isolation characteristics, data rate capabilities, and package configurations. Selection between IL 3285 and IL 3285E depends solely on regulatory compliance requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can IL 3285E replace IL 3285 in existing designs?

A: Yes. The IL 3285E is a direct electrical and mechanical substitute for the IL 3285. Both parts feature identical RS422/RS485 isolation specifications, 2500Vrms isolation voltage, 15kV/µs CMTI, 5Mbps data rate, and 16-SOIC package configuration. Substitution requires no circuit modifications.

Q: What is the primary difference between IL 3285 and IL 3285E?

A: The primary difference is RoHS compliance status. The IL 3285E is ROHS3 compliant, while the IL 3285 is RoHS non-compliant. All electrical and mechanical parameters are identical.

Q: Are both parts pin-compatible?

A: Yes. Both IL 3285 and IL 3285E use the 16-SOIC (0.295", 7.50mm Width) package with identical pinout and footprint. No PCB layout modifications are required for substitution.

Q: What applications are these digital isolators designed for?

A: These components are designed for RS422 and RS485 serial communication applications requiring galvanic isolation. Common applications include industrial automation, motor control, power conversion systems, and distributed control networks.

Q: What is the isolation voltage rating?

A: Both parts provide 2500Vrms galvanic isolation, suitable for applications requiring high-voltage isolation between communication interfaces.

Q: What is the common mode transient immunity specification?

A: Both parts feature 15kV/µs common mode transient immunity (CMTI), enabling reliable operation in high-noise industrial environments with rapid voltage transients.

Q: What supply voltage range is supported?

A: Both parts operate with dual supply voltage ranges: 3V ~ 5.5V and 4.5V ~ 5.5V, providing flexibility for various system power architectures.

Q: What is the maximum data rate?

A: Both parts support data rates up to 5Mbps, suitable for standard RS422/RS485 communication protocols.

Q: What is the operating temperature range?

A: Both parts operate across -40°C to 85°C, covering industrial and commercial temperature requirements.

Q: Are these parts available in other package options?

A: Based on the provided specifications, both IL 3285 and IL 3285E are available in 16-SOIC (0.295", 7.50mm Width) surface mount package only.