ISO7842DWWR Equivalent & Substitute Parts

Part Overview

The ISO7842DWWR is a general purpose digital isolator manufactured by Texas Instruments, featuring 5700Vrms isolation voltage and 4 channels with 100Mbps data rate capability. This component is designed for applications requiring galvanic isolation in signal transmission across different voltage domains. The part maintains Active product status with full RoHS3 compliance and is available in 16-SOIC surface mount packaging. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter constraints.

Substiute Parts

ISO7842DWWR

Texas InstrumentsIn Stock: 50268ISO7842DWWR Datasheet

Current PartRFQ

ISO7831FDWWR

Texas InstrumentsIn Stock: 4252ISO7831FDWWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISO7842DWWR is determined by the following critical parameters: isolation voltage rating (5700Vrms minimum), common mode transient immunity (100kV/µs minimum), data rate capability (100Mbps minimum), propagation delay characteristics (16ns maximum), supply voltage compatibility (2.25V ~ 5.5V), operating temperature range (-55°C ~ 125°C), and physical package format (16-SOIC). The ISO7831FDWWR qualifies as a parametric equivalent despite differing channel configuration, as it maintains all critical electrical performance thresholds and operates within identical voltage and temperature specifications. Channel count reduction from 4 to 3 channels represents a functional subset rather than a performance degradation, making this part suitable for applications not requiring the full 4-channel capacity.

Parameter Comparison

Engineering Selection Recommendations

Both the ISO7842DWWR and ISO7831FDWWR maintain Active product status with identical RoHS3 compliance and REACH unaffected classification. Selection between these parts depends on circuit requirements for channel count. The ISO7842DWWR provides 4 isolated channels (2 inputs and 2 outputs per isolation boundary), while the ISO7831FDWWR provides 3 isolated channels (2 inputs on one side, 1 output on the other). Electrical performance metrics including isolation voltage, data rate, propagation delay, and common mode transient immunity are equivalent across both parts. Both components are suitable for designs requiring 5700Vrms isolation with 100Mbps signaling in 16-SOIC packaging. Component selection should be based on the specific number of isolated signal paths required by the application circuit.

Frequently Asked Questions (FAQ)

Q: Can ISO7831FDWWR replace ISO7842DWWR in all applications? A: Substitution is valid only when the application circuit requires 3 or fewer isolated channels. The ISO7831FDWWR cannot replace the ISO7842DWWR in designs requiring 4 independent isolated channels due to reduced channel count.

Q: Are the isolation voltage ratings identical? A: Yes. Both parts provide 5700Vrms isolation voltage and are suitable for identical high-voltage isolation applications.

Q: Do these parts have the same propagation delay characteristics? A: Yes. Both parts specify maximum propagation delay of 16ns for both rising and falling edges, with identical pulse width distortion and rise/fall time specifications.

Q: Are the packages physically compatible? A: Yes. Both parts use 16-SOIC (0.551", 14.00mm Width) surface mount packaging and are footprint compatible on PCB layouts.

Q: What is the difference in channel configuration? A: ISO7842DWWR provides 2 inputs and 2 outputs per isolation boundary (4 total channels). ISO7831FDWWR provides 2 inputs on one side and 1 output on the other side (3 total channels).

Q: Do both parts meet the same compliance standards? A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity level (MSL 2, 1 Year) ratings.

Q: What supply voltage range do these parts support? A: Both parts operate with supply voltage from 2.25V to 5.5V, providing compatibility with standard logic voltage domains.