ISO7842FDWWR Equivalent & Substitute Parts

Part Overview

The ISO7842FDWWR is a general purpose digital isolator manufactured by Texas Instruments, featuring 5700Vrms isolation voltage and 4 channels with 100Mbps data rate capability. This device utilizes capacitive coupling technology and is rated for operating temperatures from -55°C to 125°C. The part is currently in active production status with ROHS3 compliance and REACH unaffected classification. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained within the allowed parameter specifications for this product category.

Substiute Parts

ISO7842FDWWR

Texas InstrumentsIn Stock: 13735ISO7842FDWWR Datasheet

Current PartRFQ

ISO7831FDWWR

Texas InstrumentsIn Stock: 4252ISO7831FDWWR Datasheet

Parametric EquivalentRFQ

ISO7842DWWR

Texas InstrumentsIn Stock: 50268ISO7842DWWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISO7842FDWWR are identified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Manufacturer: Texas Instruments
• Technology: Capacitive Coupling
• Type: General Purpose Digital Isolator
• Voltage - Isolation: 5700Vrms
• Common Mode Transient Immunity: 100kV/µs
• Data Rate: 100Mbps
• Voltage - Supply: 2.25V ~ 5.5V
• Operating Temperature Range: -55°C ~ 125°C
• Package / Case: 16-SOIC (0.551", 14.00mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Allowed Variation Parameters:

• Number of Channels: Substitutes may have different channel counts (3 or 4 channels)
• Inputs - Side 1/Side 2: Configuration may vary based on channel count
• Packaging Format: Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats are interchangeable

The ISO7842FDWWR has 4 channels with 2/2 input configuration. Substitutes maintaining all isolation, performance, and thermal specifications are listed below.

Parameter Comparison

Engineering Selection Recommendations

ISO7842DWWR is a direct functional equivalent to ISO7842FDWWR with identical electrical specifications and channel configuration (4 channels, 2/2 inputs). The primary difference is packaging format: ISO7842DWWR is supplied in Cut Tape (CT) & Digi-Reel® format versus Tape & Reel (TR) for the ISO7842FDWWR. Both parts maintain ROHS3 compliance and active production status. Selection between these two should be based on procurement and assembly requirements for packaging format compatibility.

ISO7831FDWWR is a parametric equivalent with the same isolation voltage, CMTI, data rate, propagation delay, and thermal specifications. The key difference is channel count: ISO7831FDWWR provides 3 channels with 2/1 input configuration compared to the 4-channel 2/2 configuration of ISO7842FDWWR. This substitute is applicable only when circuit design requirements can accommodate reduced channel count and the 2/1 input distribution. Both parts share identical packaging format (Tape & Reel) and maintain ROHS3 compliance with active production status.

Frequently Asked Questions (FAQ)

Q: Can ISO7842DWWR be used as a direct replacement for ISO7842FDWWR?

A: Yes. ISO7842DWWR is electrically and mechanically equivalent to ISO7842FDWWR. Both devices feature 4 channels, 5700Vrms isolation, 100kV/µs CMTI, and 100Mbps data rate in 16-SOIC packaging. The difference is packaging format: ISO7842DWWR uses Cut Tape (CT) & Digi-Reel® while ISO7842FDWWR uses Tape & Reel (TR). Selection depends on assembly line compatibility with the packaging format.

Q: When can ISO7831FDWWR substitute for ISO7842FDWWR?

A: ISO7831FDWWR can substitute only when circuit design requirements allow for 3 channels instead of 4, and when the 2/1 input configuration (2 inputs on Side 1, 1 input on Side 2) meets functional needs. All electrical performance parameters including isolation voltage, CMTI, data rate, and thermal range are identical. Mechanical compatibility is maintained through identical 16-SOIC packaging.

Q: Are all three parts pin-compatible?

A: No. ISO7842FDWWR and ISO7842DWWR are pin-compatible as both feature 4 channels in 16-SOIC packaging. ISO7831FDWWR has 3 channels and different pin assignments due to reduced channel count, so it is not pin-compatible with the 4-channel variants.

Q: What compliance certifications apply to all substitute parts?

A: All three parts (ISO7842FDWWR, ISO7842DWWR, and ISO7831FDWWR) are ROHS3 compliant, REACH unaffected, and maintain active production status from Texas Instruments. Moisture sensitivity level is 2 (1 Year) for all variants.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel versus Cut Tape & Digi-Reel) does not affect electrical performance. Format selection is based on procurement, storage, and assembly process requirements only.