IL 711-1E Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 711-1E is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, featuring 1000Vrms isolation voltage, 2 channels, and 110Mbps data rate in an 8-MSOP surface mount package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing circuit designs while meeting or exceeding the original specifications.

Substiute Parts

IL 711-1E

NVE Corp/Isolation ProductsIn Stock: 1109IL 711-1E Datasheet

Current PartRFQ

IL 711-1ETR7

NVE Corp/Isolation ProductsIn Stock: 7551IL 711-1ETR7 Datasheet

DirectRFQ

HCPL-9000-500

Broadcom LimitedIn Stock: 931HCPL-9000-500 Datasheet

SimilarRFQ

HCPL-9000-500E

Broadcom LimitedIn Stock: 992HCPL-9000-500E Datasheet

SimilarRFQ

HCPL-9030-300E

Broadcom LimitedIn Stock: 742HCPL-9030-300E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IL 711-1E is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Number of Channels: 2 (unidirectional input configuration)
• Data Rate: 110Mbps minimum
• Supply Voltage Range: 3V ~ 5.5V
• Technology: GMR (Giant Magnetoresistive)
• Propagation Delay: 15ns maximum (tpLH/tpHL)
• Pulse Width Distortion: 3ns maximum
• Rise/Fall Time: 1ns typical

Allowable Variations:

• Isolation Voltage: Equal to or greater than 1000Vrms
• Common Mode Transient Immunity: Equal to or greater than 100kV/µs
• Operating Temperature Range: May extend beyond -40°C ~ 100°C
• Package Form Factor: Physical compatibility with 8-pin surface mount configurations
• RoHS Compliance: ROHS3 preferred for regulatory alignment

Substitute Categories:

Direct Manufacturer Substitute (Same Base Product):

• IL 711-1ETR7: Same manufacturer, same base product number (IL 711), enhanced isolation voltage (2500Vrms), active product status, tape & reel packaging

Cross-Manufacturer Substitutes (Broadcom Limited):

• HCPL-9030-300E: 2-channel configuration matching IL 711-1E channel count, enhanced isolation (2500Vrms), active status, ROHS3 compliant
• HCPL-9000-500E: 1-channel configuration (reduced channel count), enhanced isolation (2500Vrms), active status, ROHS3 compliant
• HCPL-9000-500: 1-channel configuration, enhanced isolation (2500Vrms), active status, non-ROHS3 compliant

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: IL 711-1ETR7

The IL 711-1ETR7 is the optimal substitute for the IL 711-1E. Both components share the same manufacturer (NVE Corp), base product number (IL 711), and identical electrical performance specifications including 2-channel configuration, 110Mbps data rate, and 100kV/µs common mode transient immunity. The IL 711-1ETR7 provides enhanced isolation voltage (2500Vrms versus 1000Vrms), maintaining full backward compatibility while offering superior isolation performance. The component is currently in active production status with 7452 units in stock, ensuring supply continuity. ROHS3 compliance is maintained, and the tape & reel packaging format supports automated assembly processes.

Secondary Recommendation: HCPL-9030-300E

The HCPL-9030-300E (Broadcom Limited) provides a cross-manufacturer alternative with identical 2-channel configuration, matching the IL 711-1E channel count requirement. This component meets all critical electrical parameters: 110MBd data rate, 3V ~ 5.5V supply voltage, 15ns propagation delay, and 3ns pulse width distortion. The HCPL-9030-300E offers enhanced isolation voltage (2500Vrms) and extended operating temperature range (-55°C ~ 125°C). ROHS3 compliance is confirmed. However, the common mode transient immunity specification (15kV/µs) is reduced compared to the IL 711-1E (100kV/µs), requiring circuit-level evaluation for applications with high-speed transient environments.

Tertiary Recommendation: HCPL-9000-500E

The HCPL-9000-500E (Broadcom Limited) is suitable for applications where single-channel isolation is acceptable. This component maintains electrical performance parity with the IL 711-1E in terms of data rate, supply voltage, propagation delay, and pulse width distortion. ROHS3 compliance and active product status are confirmed. The reduced channel count (1 versus 2) requires circuit redesign to accommodate dual-channel isolation requirements through multiple component placement.

Not Recommended: HCPL-9000-500

The HCPL-9000-500 shares electrical specifications with HCPL-9000-500E but lacks ROHS3 compliance, presenting regulatory and supply chain risks for new designs and long-term procurement.

Frequently Asked Questions (FAQ)

Q: Can the IL 711-1ETR7 directly replace the IL 711-1E without circuit modification?

A: Yes. The IL 711-1ETR7 is a direct substitute from the same manufacturer with identical pin configuration, electrical performance, and functional behavior. The enhanced isolation voltage (2500Vrms) provides additional safety margin without requiring circuit changes. The primary difference is packaging format (tape & reel versus tube), which affects assembly process but not electrical compatibility.

Q: What is the significance of the reduced common mode transient immunity in the Broadcom HCPL-9000 and HCPL-9030 series?

A: The IL 711-1E specifies 100kV/µs common mode transient immunity, while the Broadcom alternatives specify 15kV/µs. This parameter defines the maximum rate of voltage change across the isolation barrier that the device can tolerate without introducing errors. Applications with high-speed switching events (such as motor drive circuits or high-frequency power conversion) may require the higher 100kV/µs specification. Circuit-level analysis is necessary to determine if 15kV/µs is sufficient for the intended application.

Q: Why do the Broadcom HCPL-9000 series components specify data rate in MBd instead of Mbps?

A: MBd (megabaud) and Mbps (megabits per second) are equivalent units for digital communication rates in this context. Both represent 1 million bits per second. The terminology difference reflects manufacturer documentation conventions and does not indicate a functional difference.

Q: Is the HCPL-9030-300E suitable as a direct replacement if my circuit requires 2-channel isolation?

A: The HCPL-9030-300E provides 2-channel isolation matching the IL 711-1E channel count and meets all critical electrical parameters. However, the package form factor differs (8-SMD Gull Wing versus 8-MSOP), requiring PCB layout modification. Additionally, the reduced common mode transient immunity (15kV/µs versus 100kV/µs) must be evaluated for your specific application environment. If these factors are acceptable, the HCPL-9030-300E is functionally compatible.

Q: What is the impact of extended operating temperature range in the Broadcom components?

A: The Broadcom HCPL-9000 and HCPL-9030 series support -55°C ~ 125°C operating temperature, compared to the IL 711-1E specification of -40°C ~ 100°C. This extended range provides additional design margin for applications in extreme temperature environments. For applications operating within the IL 711-1E temperature range, the extended specification offers no functional advantage but does not introduce compatibility issues.

Q: Are there inventory or supply chain considerations when selecting a substitute?

A: Yes. The IL 711-1E is discontinued at DiGi Electronics. The IL 711-1ETR7 has 7452 units in stock, HCPL-9030-300E has 675 units, and HCPL-9000-500E has 906 units. For high-volume production, the IL 711-1ETR7 offers the most reliable supply continuity. Broadcom alternatives provide secondary sourcing options but with lower inventory levels.

Q: Does RoHS compliance affect the choice of substitute?

A: For new designs and applications subject to RoHS regulations, ROHS3-compliant components are required. The IL 711-1ETR7, HCPL-9030-300E, and HCPL-9000-500E all meet ROHS3 compliance. The HCPL-9000-500 is non-compliant and should not be selected for regulated applications. Existing designs using the discontinued IL 711-1E may have legacy exemptions, but new procurement should prioritize ROHS3-compliant alternatives.

Q: What package considerations apply when substituting with Broadcom components?

A: The IL 711-1E uses 8-MSOP (0.118", 3.00mm Width) packaging. The Broadcom HCPL-9030-300E uses 8-SMD Gull Wing, and the HCPL-9000 series uses 8-DIP Gull Wing. These package types have different footprints and pin configurations, requiring PCB redesign. The IL 711-1ETR7 maintains the same 8-MSOP package, eliminating layout modification requirements.