Texas Instruments ISO7842DWR

Overview

ISO7842DWR from Texas Instruments is a reinforced quad-channel digital isolator with 8000V_PK isolation voltage, two forward and two reverse signal channels, 100Mbps signaling rate, ±100kV/μs CMTI, and operation across –55°C to 125°C. It enables safe, noise-immune communication between high-voltage motor control gate drivers and low-voltage MCU logic in industrial inverters.

For engineers reviewing the ISO7842DWR datasheet, ISO7842DWR pinout, ISO7842DWR application, or ISO7842DWR equivalent, key selection criteria include reinforced isolation certification (VDE 0884-17), dual-supply level translation (2.25V–5.5V), channel direction configuration, enable-controlled high-impedance outputs, and SOIC-16 wide-body package compatibility.

Technical Context

The ISO7842DWR implements capacitive SiO₂ isolation with dual independent power domains (VCCI/GNDI and VCCO/GNDO), supporting asymmetric supply configurations. Its architecture includes input/output buffers separated by a reinforced dielectric barrier, with dedicated EN1/EN2 pins enabling side-specific output disable for multi-controller bus arbitration.

Default output behavior differs by variant: ISO7842DWR asserts high on output loss of input power, while ISO7842FDWR asserts low. This deterministic fail-safe state supports safety-critical monitoring in medical equipment and solar inverters where output polarity during fault conditions directly impacts system response.

Key Specifications

Pinout & Package

ISO7842DWR uses a 16-pin wide-body SOIC (DW) package measuring 10.30mm × 10.30mm with 10.30mm × 7.50mm body size. The isolation barrier separates side-1 (input) and side-2 (output) terminals, requiring separate ground and supply connections per side.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel reinforced digital isolator applications.

Compared with ADUM2402BRWZ and SI8642ED-B-IS, ISO7842DWR uniquely delivers 8000V_PK reinforced isolation, 100Mbps signaling, and programmable fail-safe outputs - making it the only option qualified for high-voltage motor drives, medical imaging, and EV charging where regulatory compliance and timing integrity are non-negotiable.

Availability

ISO7842DWR is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and medical imaging systems requiring stable component supply, long-term lifecycle assurance, and certified reinforced isolation.

Supply support for ISO7842DWR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-reliability ICs, with decades of expertise in isolation technology and industrial-grade signal conditioning.

The ISO7842x family was designed specifically for high-noise, high-voltage applications including motor control, renewable energy, and medical equipment - prioritizing reinforced safety certification, electromagnetic robustness, and precise timing performance.

FAQ

What is the reinforced isolation rating of ISO7842DWR and which standards does it meet?

The ISO7842DWR provides 8000V_PK reinforced isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 5.7kV_RMS for 1 minute per UL 1577. It also holds certifications to IEC 61010-1, IEC 62368-1, IEC 60601-1, and GB 4943.1. These ratings are verified through production testing and qualification per the respective standards, ensuring compliance in safety-critical industrial and medical applications where ISO7842DWR is deployed.

Does ISO7842DWR support different supply voltages on input and output sides?

Yes, ISO7842DWR supports independent 2.25V–5.5V supplies on VCCI/GNDI (input side) and VCCO/GNDO (output side). This enables true level translation - for example, connecting a 3.3V microcontroller to a 5V gate driver - without external level-shifting circuitry. The device maintains full electrical specifications across all valid supply combinations, as confirmed in Sections 5.9–5.14 of the ISO7842DWR datasheet.

What is the default output state of ISO7842DWR during input power loss?

When input-side power (VCCI) is lost, ISO7842DWR outputs assert a high state. This fail-safe behavior is intrinsic to the ISO7842 variant (as opposed to ISO7842F, which asserts low). It is critical for applications like motor control, where a high output can trigger immediate gate shutdown via external logic - a feature explicitly documented in the Device Functional Modes section of the ISO7842DWR datasheet.

How does the enable functionality work on ISO7842DWR?

ISO7842DWR has two enable pins: EN1 controls outputs OUTA/OUTB (side-2), and EN2 controls OUTC/OUTD (side-2). When an enable pin is low, its associated outputs enter high-impedance state - allowing multiple controllers to share a common bus. EN1/EN2 are active-high and default to enabled when left open or pulled high. This behavior is electrically verified and detailed in the Pin Functions table (Section 4) of the ISO7842DWR datasheet.

What package type is ISO7842DWR supplied in, and what are its mechanical dimensions?

ISO7842DWR is supplied in a 16-pin wide-body SOIC (DW) package with nominal dimensions of 10.30mm × 10.30mm (including pins) and a body size of 10.30mm × 7.50mm. This package meets creepage and clearance requirements for 8000V_PK reinforced isolation, with >8mm external clearance and >8mm creepage - values confirmed in Section 5.6 (Insulation Specifications) of the ISO7842DWR datasheet.