IL 3585 RS422/RS485 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 3585 is an active RS422/RS485 digital isolator manufactured by NVE Corp/Isolation Products, utilizing GMR (Giant Magnetoresistive) technology. This component provides galvanic isolation of 2500Vrms across 3 channels with a maximum common mode transient immunity of 30kV/µs and data rate capability of 40Mbps. The IL 3585 is classified as an Active product and is currently in production. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, packaging preferences, or compliance requirements.

Substiute Parts

IL 3585

NVE Corp/Isolation ProductsIn Stock: 1179IL 3585 Datasheet

Current PartRFQ

IL 3585E

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IL 3585 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• RS422/RS485 digital isolator type
• 3-channel configuration with 2/1 input distribution
• Unidirectional channel type
• 2500Vrms isolation voltage
• 30kV/µs common mode transient immunity
• 40Mbps data rate capability
• 35ns maximum propagation delay (both tpLH and tpHL)
• Supply voltage range: 3V ~ 5.5V and 4.5V ~ 5.5V
• Operating temperature range: -40°C ~ 85°C

Mechanical Equivalence Requirements:

• 16-SOIC surface mount package
• GMR technology platform
• IsoLoop® series designation

The IL 3585E qualifies as a direct substitute based on complete electrical parameter equivalence. The primary distinction between the IL 3585 and IL 3585E is the physical package width dimension and packaging format, with no impact on electrical performance or functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

IL 3585 Selection Criteria: The IL 3585 is appropriate for applications where RoHS non-compliant components are acceptable and standard 16-SOIC package width (0.295", 7.50mm) accommodates PCB layout requirements. This variant maintains Active product status with established supply availability.

IL 3585E Selection Criteria: The IL 3585E is the preferred substitute when ROHS3 compliance is a mandatory requirement. The IL 3585E features a narrower 16-SOIC package width (0.154", 3.90mm), which may provide advantages in space-constrained PCB designs. The IL 3585E is supplied in Tube packaging format and demonstrates higher inventory availability (7867 Pcs vs. 1126 Pcs). Both components maintain identical electrical performance and Active product status.

Compliance Considerations: Selection between IL 3585 and IL 3585E should account for RoHS compliance mandates applicable to the end application and geographic market. The IL 3585E's ROHS3 compliance status aligns with current environmental regulations in regulated markets.

Frequently Asked Questions (FAQ)

Q: Are IL 3585 and IL 3585E electrically interchangeable?

A: Yes. Both components provide identical electrical performance across all specified parameters including isolation voltage, data rate, propagation delay, and supply voltage ranges. Substitution is electrically valid without functional degradation.

Q: What is the primary difference between IL 3585 and IL 3585E?

A: The primary differences are package width dimension (0.295" vs. 0.154") and RoHS compliance status (non-compliant vs. ROHS3 compliant). Electrical specifications and channel configuration are identical.

Q: Can IL 3585E replace IL 3585 on existing PCBs?

A: PCB compatibility depends on footprint design. The narrower package width of IL 3585E (3.90mm vs. 7.50mm) may require PCB layout verification. Electrical substitution is valid; mechanical fit must be confirmed against specific PCB design.

Q: Which part should be selected for new designs?

A: Selection is based on compliance requirements and PCB layout constraints. IL 3585E is recommended when ROHS3 compliance is required or when the narrower package width provides layout advantages. IL 3585 remains valid for applications without RoHS compliance mandates.

Q: Are there supply or packaging differences?

A: IL 3585E is supplied in Tube packaging with higher inventory availability (7867 Pcs). IL 3585 packaging format is not specified in available data. Both maintain MSL 1 (Unlimited) moisture sensitivity classification.

Q: Do both parts support the same operating temperature range?

A: Yes. Both IL 3585 and IL 3585E operate across -40°C to 85°C temperature range with identical thermal specifications.

Q: Is the GMR technology platform identical in both variants?

A: Yes. Both components utilize GMR (Giant Magnetoresistive) technology within the IsoLoop® series, ensuring consistent isolation performance and reliability characteristics.