IL 712T-1E Digital Isolator Equivalent & Substitute Parts

Part Overview

The IL 712T-1E is a general purpose digital isolator manufactured by NVE Corp/Isolation Products, part of the IsoLoop® series. This component provides 1000Vrms isolation with 2 channels, 110Mbps data rate, and 100kV/µs common mode transient immunity in an 8-MSOP surface mount package. The IL 712T-1E is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. Alternative components must maintain compatibility with the electrical isolation requirements, channel configuration, data rate specifications, and physical package constraints of the original design.

Substiute Parts

IL 712T-1E

NVE Corp/Isolation ProductsIn Stock: 1020IL 712T-1E Datasheet

Current PartRFQ

IL 712T-1ETR7

NVE Corp/Isolation ProductsIn Stock: 1781IL 712T-1ETR7 Datasheet

MFR RecommendedRFQ

HCPL-9031-300

Broadcom LimitedIn Stock: 936HCPL-9031-300 Datasheet

SimilarRFQ

HCPL-9031-300E

Broadcom LimitedIn Stock: 1209HCPL-9031-300E Datasheet

SimilarRFQ

HCPL-9031-500E

Broadcom LimitedIn Stock: 772HCPL-9031-500E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IL 712T-1E is determined by the following critical parameters:

Primary Compatibility Criteria:

• Number of Channels: 2 (unidirectional)
• Data Rate: 110Mbps minimum
• Propagation Delay: 15ns maximum (tpLH and tpHL)
• Pulse Width Distortion: 3ns maximum
• Rise/Fall Time: 1ns typical
• Operating Temperature Range: -40°C to 125°C minimum
• Surface Mount Package: 8-pin configuration
• Technology: GMR (Giant Magnetoresistive)

Substitution Flexibility Parameters:

• Voltage - Isolation: 1000Vrms or higher
• Common Mode Transient Immunity: 100kV/µs or higher
• Voltage - Supply: 2.7V to 5.5V (compatible with 3V ~ 5.5V requirement)
• Packaging Format: Tube or Tape & Reel (both acceptable for substitution)
• Isolated Power: Yes or No (both acceptable)
• Type: General Purpose or CAN/RS485 (both acceptable)

Substitute parts are grouped into two categories: MFR Recommended (same manufacturer, active product status) and Similar (alternative manufacturer, higher isolation voltage, different package footprint).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: IL 712T-1ETR7

The IL 712T-1ETR7 is the manufacturer-recommended substitute for the IL 712T-1E. Both components are manufactured by NVE Corp and utilize GMR technology. The IL 712T-1ETR7 maintains identical electrical specifications including 1000Vrms isolation, 110Mbps data rate, 100kV/µs CMTI, and 15ns propagation delay. The primary differences are packaging format (Tape & Reel versus Tube) and product status (Active versus Discontinued). The IL 712T-1ETR7 offers expanded supply voltage range (2.7V ~ 5.5V) and includes isolated power capability. This part is currently in active production with 1688 units in stock and maintains ROHS3 compliance.

Secondary Recommendation: HCPL-9031-300E

The HCPL-9031-300E, manufactured by Broadcom Limited, provides a functionally compatible alternative with enhanced isolation voltage (2500Vrms versus 1000Vrms). This part maintains the same 2-channel configuration, 110MBd data rate, 15ns propagation delay, and 3ns pulse width distortion. The HCPL-9031-300E is ROHS3 compliant and currently in active production with 1111 units in stock. The package footprint differs (8-SMD Gull Wing versus 8-MSOP), requiring PCB layout verification. Operating temperature range extends to -55°C, providing broader environmental coverage.

Alternative Option: HCPL-9031-500E

The HCPL-9031-500E offers identical electrical performance to the HCPL-9031-300E with Tape & Reel packaging format. This part is suitable for high-volume production environments and maintains ROHS3 compliance with 666 units in stock.

Not Recommended: HCPL-9031-300

The HCPL-9031-300 is RoHS non-compliant and does not meet current regulatory requirements for new designs, despite matching electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can the IL 712T-1ETR7 directly replace the IL 712T-1E in existing designs?

A: Yes. The IL 712T-1ETR7 maintains identical electrical specifications and pin configuration. The only difference is packaging format (Tape & Reel versus Tube), which does not affect circuit functionality. Both components use the same 8-MSOP package footprint.

Q: What is the key difference between IL 712T-1E and IL 712T-1ETR7?

A: The IL 712T-1ETR7 is the active production equivalent with expanded supply voltage range (2.7V minimum versus 3V minimum) and integrated isolated power capability. The IL 712T-1E is discontinued. Electrical isolation, data rate, and timing specifications are identical.

Q: Can Broadcom HCPL-9031 series parts replace the NVE IL 712T-1E?

A: Electrical substitution is possible with design verification. The HCPL-9031 series maintains 2-channel configuration, 110MBd data rate, and 15ns propagation delay. However, the package footprint differs (8-SMD Gull Wing versus 8-MSOP), requiring PCB layout changes. The HCPL-9031 series provides higher isolation voltage (2500Vrms), which is a design upgrade rather than a limitation.

Q: What is the significance of the higher isolation voltage in HCPL-9031 parts?

A: The HCPL-9031 series provides 2500Vrms isolation compared to 1000Vrms in the IL 712T-1E. This is a performance enhancement that increases safety margins in high-voltage isolation applications. Designs specified for 1000Vrms isolation operate within the HCPL-9031 capability envelope.

Q: Are there supply voltage compatibility concerns when substituting?

A: The IL 712T-1ETR7 accepts 2.7V minimum supply voltage, while the IL 712T-1E requires 3V minimum. This represents improved compatibility with lower-voltage systems. The HCPL-9031 series maintains 3V minimum supply voltage, matching the original specification. All substitute parts support the 5.5V maximum supply voltage.

Q: What packaging considerations apply to HCPL-9031 substitution?

A: The HCPL-9031 series uses 8-SMD Gull Wing package versus the 8-MSOP package of the IL 712T-1E. PCB footprint, solder reflow profile, and pick-and-place equipment compatibility require verification. Pin assignment and signal routing must be confirmed against component datasheets before implementation.

Q: Which substitute part offers the best compliance profile?

A: The IL 712T-1ETR7 and HCPL-9031-300E both maintain ROHS3 compliance. The IL 712T-1ETR7 is preferred for direct replacement due to identical package footprint. The HCPL-9031-300E is preferred for new designs requiring higher isolation voltage and extended temperature range (-55°C to 125°C).

Q: Is common mode transient immunity (CMTI) a limiting factor in substitution?

A: The IL 712T-1E specifies 100kV/µs CMTI, while the HCPL-9031 series specifies 15kV/µs CMTI. Designs specified for 100kV/µs CMTI performance cannot use HCPL-9031 parts as direct substitutes. The IL 712T-1ETR7 maintains 100kV/µs CMTI and is the appropriate choice for CMTI-critical applications.