Texas Instruments ISOW7844FDWER

Overview

ISOW7844FDWER from Texas Instruments is a reinforced quad-channel digital isolator with integrated 5-V-to-5-V DC-DC converter, delivering up to 130 mA isolated output current, 100 Mbps data rate, and 5000 VRMS isolation rating in a 16-pin wide SOIC package. It enables compact isolated power + signal transfer in industrial motor drives and medical patient-monitoring interfaces.

For engineers reviewing the ISOW7844FDWER datasheet, ISOW7844FDWER pinout, ISOW7844FDWER application, or ISOW7844FDWER equivalent, key selection criteria include its 5-V-to-5-V power configuration, F-suffix low-default output behavior, ±100 kV/µs CMTI, and VDE-reinforced certification for 2 MOPP medical systems.

Technical Context

The ISOW7844FDWER implements four unidirectional signal channels with all inputs on the isolated (secondary) side and all outputs on the primary side - a reverse-direction topology optimized for isolated sensor or feedback signal return. Its on-chip transformer-based DC-DC converter operates at high efficiency with soft-start, overload protection, and thermal shutdown, eliminating external isolated bias supplies.

Signal isolation uses dual capacitive SiO₂ barriers per channel, achieving >100-year lifetime at 1 kVRMS working voltage and ±8 kV IEC 61000-4-2 contact ESD across the barrier. The SEL pin configures VISO to 5 V (SEL tied to VISO) or 3.3 V (SEL grounded/floating), but ISOW7844FDWER is specified for 5-V-to-5-V operation with ≥130 mA load capability.

Key Specifications

Pinout & Package

ISOW7844FDWER is housed in a 16-pin wide-body SOIC (DWE) package measuring 10.30 mm × 7.50 mm, with creepage and clearance >8 mm and reinforced insulation per DIN V VDE V 0884-11:2017-01.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel isolated power + signal applications.

Compared with ADUM6404ARWZ and SI8844ED-IS, ISOW7844FDWER delivers higher data rate, superior CMTI, and full 2 MOPP medical qualification - making it the preferred choice for next-generation motor drives and certified patient-connected devices requiring integrated, robust, and standards-compliant isolation.

Availability

ISOW7844FDWER is available at Aetrix Electronics and suitable for industrial motor control, medical patient monitoring, grid infrastructure, test and measurement, and isolated sensor interface applications requiring stable component supply and long-term lifecycle support.

Supply support for ISOW7844FDWER 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and medical markets.

The ISOW784x family was developed to integrate signal isolation and isolated DC-DC conversion into a single package, targeting space-constrained, high-reliability applications such as motor drives, energy infrastructure, and certified medical equipment.

FAQ

What is the default output state of ISOW7844FDWER when input signals are lost?

The ISOW7844FDWER features an F-suffix designation indicating low-default output behavior: all four output channels (OUTA–OUTD) drive low when input signals (INA–IND) are absent or invalid. This fail-safe state prevents unintended activation of downstream circuitry such as gate drivers or relays, enhancing system safety in industrial and medical applications where ISOW7844FDWER is deployed.

Does ISOW7844FDWER support 3.3-V input or output configurations?

Yes, ISOW7844FDWER supports multiple input/output voltage combinations via the SEL pin: tying SEL to VISO configures 5-V-to-5-V operation (≥130 mA), while grounding or floating SEL selects 5-V-to-3.3-V (≥130 mA), 3.3-V-to-5-V (≥40 mA), or 3.3-V-to-3.3-V (≥75 mA). However, ISOW7844FDWER is specifically characterized and rated for 5-V-to-5-V operation in its primary specification table.

What safety certifications apply to ISOW7844FDWER?

ISOW7844FDWER holds VDE 0884-11:2017-01 (7071 VPK reinforced), UL 1577 (5000 VRMS), CSA/IEC 62368-1 and IEC 60601-1 (2 MOPP), CQC GB4943.1-2011, and TUV EN 61010-1/EN 60950-1 certifications. These validate its use in Class I medical devices, industrial safety systems, and grid-connected equipment requiring reinforced insulation and patient protection.

How does the integrated DC-DC converter in ISOW7844FDWER differ from discrete isolated power solutions?

The ISOW7844FDWER integrates a high-efficiency on-chip transformer-based DC-DC converter that delivers up to 0.65 W of isolated power without external magnetics or regulators. Unlike discrete solutions requiring separate isolated DC-DC modules, this integration reduces PCB footprint by >50%, eliminates layout-sensitive transformer placement, and guarantees matched timing between signal and power isolation barriers - critical for ISOW7844FDWER's performance in real-time control loops.

What is the maximum continuous load current ISOW7844FDWER can deliver on its VISO rail?

ISOW7844FDWER delivers ≥130 mA of continuous output current at 5 V on its VISO rail when configured in 5-V-to-5-V mode (SEL tied to VISO), as verified under recommended operating conditions (VCC = 5 V, TA ≤ 125°C). This output current supports isolated microcontrollers, precision ADCs, or dual-channel gate drivers without additional regulation, directly enabling compact isolated subsystem designs using ISOW7844FDWER.