ISO7842FDWR Equivalent & Substitute Parts

Part Overview

The ISO7842FDWR is a general purpose digital isolator manufactured by Texas Instruments, featuring 5700Vrms isolation voltage and 4 channels with 100Mbps data rate capability. This component utilizes capacitive coupling technology and is designed for applications requiring robust galvanic isolation in industrial and communication systems. The part maintains active product status with ROHS3 compliance and is currently in stock with substantial inventory availability.

Alternative models may be required due to channel configuration needs, specific Common Mode Transient Immunity (CMTI) requirements, or packaging format preferences in production environments.

Substiute Parts

ISO7842FDWR

Texas InstrumentsIn Stock: 89747ISO7842FDWR Datasheet

Current PartRFQ

ISO7831FDWR

Texas InstrumentsIn Stock: 4460ISO7831FDWR Datasheet

Parametric EquivalentRFQ

ISO7842DWR

Texas InstrumentsIn Stock: 1444ISO7842DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISO7842FDWR is determined by the following critical parameters:

Primary Substitution Criteria:

• Isolation voltage rating (5700Vrms minimum)
• Package type (16-SOIC form factor)
• Supply voltage range compatibility (2.25V ~ 5.5V)
• Operating temperature range (-55°C ~ 125°C)
• Technology platform (Capacitive Coupling)
• Product status (Active)

Secondary Consideration Parameters:

• Number of channels (4-channel configuration preferred for direct replacement)
• Common Mode Transient Immunity (100kV/µs or higher for equivalent performance)
• Data rate (100Mbps minimum)
• Packaging format (Tape & Reel or Cut Tape formats acceptable)

The ISO7842FDWR has two identified substitute parts within the Texas Instruments digital isolator portfolio. These substitutes maintain compatibility across core electrical and mechanical specifications while offering variations in channel configuration and CMTI performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

ISO7842DWR is the primary substitute for direct replacement applications. This part maintains identical channel configuration (4 channels), CMTI performance (100kV/µs), and all critical electrical parameters. The only distinction is packaging format: ISO7842DWR is supplied in Cut Tape (CT) & Digi-Reel® format versus Tape & Reel (TR) for the ISO7842FDWR. Both parts share the same base product number (ISO7842) and are functionally equivalent at the component level. Selection between these two depends solely on production line packaging requirements.

ISO7831FDWR is applicable only when circuit design accommodates a 3-channel configuration with 2/1 channel distribution (2 channels on Side 1, 1 channel on Side 2). This substitute exhibits reduced CMTI performance at 70kV/µs compared to the 100kV/µs specification of the ISO7842FDWR. Applications with stringent Common Mode Transient Immunity requirements must retain the ISO7842FDWR or ISO7842DWR. All three parts maintain active product status, ROHS3 compliance, and identical supply voltage and temperature operating ranges.

Frequently Asked Questions (FAQ)

Q: Can ISO7842DWR replace ISO7842FDWR in existing designs?

A: Yes. ISO7842DWR is a direct functional equivalent with identical electrical specifications and channel configuration. The difference is packaging format only: ISO7842DWR uses Cut Tape (CT) & Digi-Reel® while ISO7842FDWR uses Tape & Reel (TR). Component-level performance is equivalent.

Q: What are the limitations of ISO7831FDWR as a substitute?

A: ISO7831FDWR has two key differences: it provides 3 channels instead of 4, with a 2/1 channel distribution, and its CMTI rating is 70kV/µs versus 100kV/µs. Use this substitute only when circuit design requires exactly 3 channels and can tolerate the lower CMTI specification.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the 16-SOIC (0.295", 7.50mm Width) package, ensuring identical PCB footprint compatibility. Physical placement and soldering procedures are interchangeable.

Q: Do supply voltage and operating temperature ranges differ among these parts?

A: No. All three parts operate across 2.25V to 5.5V supply voltage and -55°C to 125°C temperature range. These specifications are identical.

Q: What is the significance of the packaging format difference?

A: Packaging format (Tape & Reel versus Cut Tape & Digi-Reel) affects production handling and component feeding into automated assembly equipment. Electrical and mechanical performance is unaffected. Selection depends on manufacturing line compatibility.

Q: Are all parts ROHS3 compliant?

A: Yes. ISO7842FDWR, ISO7831FDWR, and ISO7842DWR all carry ROHS3 compliance certification with Moisture Sensitivity Level 2 (1 Year).