IL 611A-3 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 611A-3 is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, part of the IsoLoop® series. This component provides 2500Vrms isolation across 2 channels with a data rate of 10Mbps and operates across a supply voltage range of 3V to 5.5V. The IL 611A-3 is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The substitute part IL 611A-3E maintains functional compatibility while offering active product status and improved compliance certifications.

Substiute Parts

IL 611A-3

NVE Corp/Isolation ProductsIn Stock: 1022IL 611A-3 Datasheet

Current PartRFQ

IL 611A-3E

NVE Corp/Isolation ProductsIn Stock: 1485IL 611A-3E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The IL 611A-3E qualifies as a direct substitute for the IL 611A-3 based on the following criteria:

Electrical Compatibility:

• Identical isolation voltage: 2500Vrms
• Identical number of channels: 2
• Identical data rate: 10Mbps
• Identical common mode transient immunity: 15kV/µs
• Identical supply voltage range: 3V ~ 5.5V
• Identical propagation delay specifications: tpLH 75ns (Max), tpHL 25ns (Max)

Mechanical Compatibility:

• Identical package type: 8-SOIC (0.154", 3.90mm Width)
• Identical mounting type: Surface Mount
• Identical moisture sensitivity level: MSL 1 (Unlimited)

Regulatory Alignment:

• Both parts share identical ECCN and HTSUS classifications
• Both parts maintain REACH Unaffected status

The substitution is valid for applications requiring identical electrical performance and physical form factor. The IL 611A-3E represents the active production equivalent with enhanced compliance status.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: Select IL 611A-3E. This part is in active production status and complies with ROHS3 standards, ensuring long-term availability and regulatory alignment with current environmental directives.

For Existing Designs Using IL 611A-3: IL 611A-3E is a direct functional replacement. The operating temperature range of IL 611A-3E (-40°C ~ 85°C) is narrower than the IL 611A-3 (-55°C ~ 125°C). Verify that application requirements fall within the IL 611A-3E temperature range before substitution. If extended temperature operation below -40°C or above 85°C is required, the IL 611A-3 specifications must be maintained.

Compliance Considerations: The IL 611A-3E provides ROHS3 compliance, whereas the IL 611A-3 is non-compliant. For applications subject to RoHS regulations or customer requirements mandating RoHS compliance, IL 611A-3E is the appropriate selection.

Packaging and Inventory: IL 611A-3E is supplied in Tube packaging with 1471 pieces in stock. IL 611A-3 is supplied in standard packaging with 948 pieces in stock. Both parts maintain identical MSL 1 (Unlimited) moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Can IL 611A-3E be used as a direct replacement for IL 611A-3 in existing PCB designs?

A: Yes, IL 611A-3E is a direct replacement from a physical and electrical standpoint. Both parts use identical 8-SOIC (0.154", 3.90mm Width) packaging and surface mount configuration. Pin-to-pin compatibility is maintained. However, verify that your application's operating temperature requirements fall within -40°C to 85°C, as this is the operating range for IL 611A-3E.

Q: What is the primary difference between IL 611A-3 and IL 611A-3E?

A: The IL 611A-3 is obsolete and RoHS non-compliant, while IL 611A-3E is an active product with ROHS3 compliance. Electrically and mechanically, both parts are identical. The IL 611A-3E has a narrower operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C).

Q: Are there any electrical performance differences between these parts?

A: No. Both parts provide identical isolation voltage (2500Vrms), data rate (10Mbps), common mode transient immunity (15kV/µs), propagation delay specifications, and supply voltage range (3V ~ 5.5V).

Q: Which part should be specified for new production?

A: IL 611A-3E should be specified for all new designs and production. It is in active status, ensuring ongoing availability and support. It also meets current RoHS3 compliance requirements.

Q: Does the narrower operating temperature range of IL 611A-3E affect most applications?

A: For most commercial and industrial applications operating between -40°C and 85°C, IL 611A-3E is fully suitable. Only applications requiring operation below -40°C or above 85°C would require the extended temperature range of the IL 611A-3. Verify your specific application requirements before selection.

Q: Are both parts available in the same packaging options?

A: IL 611A-3 is supplied in standard packaging, while IL 611A-3E is supplied in Tube packaging. Both maintain identical MSL 1 (Unlimited) moisture sensitivity levels. The physical package dimensions and form factor are identical.

Q: What certifications and compliance standards apply to these parts?

A: Both parts share identical ECCN (5A991A) and HTSUS (8542.39.0001) classifications and maintain REACH Unaffected status. IL 611A-3E additionally provides ROHS3 compliance, while IL 611A-3 is RoHS non-compliant.