IL 611-2 Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 611-2 is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, utilizing GMR (Giant Magnetoresistive) technology. This component provides 2500Vrms isolation across 2 channels with a maximum data rate of 40Mbps and 15kV/µs common mode transient immunity in an 8-DIP through-hole package.

The IL 611-2 is classified as obsolete. Identifying equivalent and substitute parts is necessary to support legacy system maintenance, design updates, and procurement continuity where original components are no longer in active production.

Substiute Parts

IL 611-2

NVE Corp/Isolation ProductsIn Stock: 1158IL 611-2 Datasheet

Current PartRFQ

IL 611-2E

NVE Corp/Isolation ProductsIn Stock: 1321IL 611-2E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IL 611-2 is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Isolation voltage: 2500Vrms (must match or exceed)
• Number of channels: 2 (must match)
• Channel type: Unidirectional (must match)
• Package / Case: 8-DIP (0.300", 7.62mm) (must match for mechanical fit)
• Mounting type: Through Hole (must match)
• Supply voltage range: 3V ~ 5.5V (must be compatible)
• Common mode transient immunity: 15kV/µs (must match or exceed)

Performance Parameters (Enhancement Allowed):

• Data rate: 40Mbps (substitutes may exceed this specification)
• Propagation delay: May be improved (lower values acceptable)
• Pulse width distortion: May be improved (lower values acceptable)
• Operating temperature range: May be narrower or wider

The IL 611-2E qualifies as a direct substitute because it maintains all mandatory compatibility parameters while offering enhanced performance specifications.

Parameter Comparison

Engineering Selection Recommendations

IL 611-2E as Primary Substitute:

The IL 611-2E is the direct manufacturer substitute for the IL 611-2. Selection of the IL 611-2E is supported by the following factors:

1. Product Status: The IL 611-2E is in active production status, ensuring long-term availability and supply chain continuity compared to the obsolete IL 611-2.

2. Regulatory Compliance: The IL 611-2E is ROHS3 compliant, whereas the IL 611-2 is non-compliant. For applications subject to RoHS regulations, the IL 611-2E is the required choice.

3. Electrical Compatibility: All critical electrical parameters are identical or superior. The IL 611-2E maintains the same isolation voltage (2500Vrms), channel configuration (2 channels), common mode transient immunity (15kV/µs), and supply voltage range (3V ~ 5.5V).

4. Performance Enhancement: The IL 611-2E provides improved performance with 100Mbps data rate (versus 40Mbps), reduced propagation delay (15ns versus 25ns), and reduced pulse width distortion (5ns versus 10ns). These enhancements are backward compatible with applications designed for the IL 611-2.

5. Package Compatibility: Both parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging, enabling direct PCB-level substitution without layout modifications.

Operating Temperature Consideration:

The IL 611-2E has a narrower operating temperature range (-40°C ~ 85°C) compared to the IL 611-2 (-55°C ~ 125°C). Applications requiring operation below -40°C or above 85°C must evaluate this specification against system requirements.

Frequently Asked Questions (FAQ)

Q: Can the IL 611-2E be used as a direct replacement for the IL 611-2 on existing PCBs?

A: Yes. The IL 611-2E is mechanically and electrically compatible with the IL 611-2. Both components use the same 8-DIP (0.300", 7.62mm) through-hole package and pinout. No PCB modifications are required for substitution.

Q: What are the key differences between the IL 611-2 and IL 611-2E?

A: The IL 611-2E offers three primary improvements: (1) higher data rate of 100Mbps versus 40Mbps, (2) faster propagation delay of 15ns versus 25ns, and (3) lower pulse width distortion of 5ns versus 10ns. The IL 611-2E is also ROHS3 compliant and in active production, whereas the IL 611-2 is obsolete and non-compliant. The IL 611-2E has a narrower operating temperature range (-40°C ~ 85°C versus -55°C ~ 125°C).

Q: Is the IL 611-2E suitable for applications requiring the full -55°C ~ 125°C temperature range?

A: No. The IL 611-2E operates only from -40°C ~ 85°C. Applications requiring operation below -40°C or above 85°C must confirm that the IL 611-2E meets system temperature specifications before substitution. If the full temperature range is mandatory, alternative components outside the IsoLoop® series may be required.

Q: Are there any compliance or regulatory differences between the IL 611-2 and IL 611-2E?

A: Yes. The IL 611-2E is ROHS3 compliant, while the IL 611-2 is RoHS non-compliant. Both parts are REACH unaffected. For applications subject to RoHS regulations, the IL 611-2E is the required choice.

Q: What is the packaging difference between the IL 611-2 and IL 611-2E?

A: The IL 611-2 is supplied in standard packaging, while the IL 611-2E is supplied in tube packaging. Both use the same 8-DIP (0.300", 7.62mm) component form factor. Tube packaging does not affect electrical performance or PCB compatibility.

Q: Can the IL 611-2E handle higher data rates than the IL 611-2?

A: Yes. The IL 611-2E supports data rates up to 100Mbps, compared to 40Mbps for the IL 611-2. Applications designed for the IL 611-2 at 40Mbps will operate within the IL 611-2E specification. Applications requiring higher data rates up to 100Mbps can utilize the IL 611-2E's enhanced bandwidth.

Q: Are the isolation voltage and common mode transient immunity specifications identical?

A: Yes. Both the IL 611-2 and IL 611-2E provide 2500Vrms isolation voltage and 15kV/µs common mode transient immunity. These critical safety and performance parameters are unchanged between the two parts.