Texas Instruments ISO7740FDWR

Overview

ISO7740FDWR from Texas Instruments is a reinforced quad-channel digital isolator with 5000VRMS isolation rating (DW package), 100Mbps data rate, ±100kV/μs CMTI, and dual 2.25V–5.5V supply capability. It provides unidirectional signal isolation for industrial motor control, solar inverters, and medical equipment where high noise immunity and long-term barrier reliability (>30-year lifetime at 1500VRMS working voltage) are critical.

For engineers reviewing the ISO7740FDWR datasheet, ISO7740FDWR pinout, ISO7740FDWR application, or ISO7740FDWR equivalent, key selection criteria include its reinforced insulation certification (DIN EN IEC 60747-17), default-low output logic (F-suffix), SOIC-16W package with >8mm creepage/clearance, and channel enable functionality for multi-controller bus driving.

Technical Context

The ISO7740FDWR implements four capacitive SiO₂ isolation barriers in a single-direction configuration (all channels A→B), enabling galvanic separation between input-side (VCCI/GNDI) and output-side (VCCO/GNDO) domains. Its dual-supply architecture supports level translation across 2.25V–5.5V ranges on each side, while integrated enable pins (EN1, EN2) allow independent tri-state control of input-side and output-side outputs.

Designed for system-level EMC robustness, it delivers ±8kV IEC 61000-4-2 contact ESD protection across the barrier, 12.8kV surge immunity (oil test), and low emissions - all validated under DIN EN IEC 60747-17 (VDE 0884-17) and UL 1577 standards. The device operates across –55°C to 125°C and features UVLO with 100–200mV hysteresis.

Key Specifications

Pinout & Package

ISO7740FDWR is housed in a 16-pin Wide-SOIC (DW-16) package measuring 10.30 mm × 10.30 mm (body size 10.30 mm × 7.50 mm), with >8 mm creepage and clearance, and reinforced insulation per VDE 0884-17.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ISO7741FDWR and ADUM140D0BRWZ, ISO7740FDWR uniquely combines unidirectional channel mapping, reinforced certification, and dual enable pins - making it the only option qualified for IEC 60601-1 medical power supplies and UL-certified energy storage systems requiring guaranteed 30-year barrier lifetime.

Availability

ISO7740FDWR is available at Aetrix Electronics and suitable for industrial motor control, solar inverters, and medical imaging power supplies requiring stable component supply, long-lifecycle assurance, and full safety certification traceability.

Supply support for ISO7740FDWR 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 isolation technologies with over 50 years of innovation in power management and signal chain solutions.

The ISO774x family was engineered for high-noise industrial and safety-critical systems - delivering reinforced isolation, ultra-high CMTI, and extended temperature operation to replace optocouplers in motor drives, renewable energy, and medical equipment.

FAQ

What is the isolation rating and certification status of ISO7740FDWR?

ISO7740FDWR has a 5000 VRMS isolation rating per UL 1577 and is certified to DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation. It also holds UL 1577 Component Recognition, IEC 62368-1, IEC 60601-1, and GB 4943.1 certifications - making ISO7740FDWR suitable for medical, industrial, and energy storage applications requiring dual-barrier safety compliance.

Does ISO7740FDWR support level translation between different supply voltages?

Yes, ISO7740FDWR supports independent 2.25V–5.5V supplies on input (VCC1) and output (VCC2) sides, enabling seamless level translation - for example, interfacing a 3.3V microcontroller to a 5V gate driver. Input thresholds scale with VCCI (0.3× to 0.7×), and output drive strength adapts to VCCO, ensuring robust signal integrity across voltage domains in ISO7740FDWR implementations.

What does the 'F' suffix in ISO7740FDWR indicate?

The 'F' suffix in ISO7740FDWR denotes default-low output behavior: when input power is lost or ENx is low, all output pins (OUTA–OUTD) drive low. This fail-safe state prevents unintended activation of downstream circuitry - critical in gate driver enable paths and medical interlock systems where ISO7740FDWR is deployed.

How does the enable pin functionality work in ISO7740FDWR?

ISO7740FDWR features two independent enable pins: EN1 controls side-1 outputs (e.g., input-side status signals), and EN2 controls side-2 outputs (e.g., gate-driver commands). When pulled low, each enables tri-state output mode - allowing shared buses and dynamic power gating. This dual-enable architecture is unique to ISO7740FDWR within the ISO774x family and supports complex multi-controller topologies.

What package type and footprint does ISO7740FDWR use?

ISO7740FDWR uses the Wide-SOIC (DW-16) package: 10.30 mm × 10.30 mm body with 10.30 mm × 7.50 mm footprint, 1.27 mm pitch, and >8 mm creepage/clearance. This package meets reinforced insulation requirements for high-voltage industrial designs and is compatible with standard SOIC-16W PCB footprints - no layout redesign is needed when upgrading from legacy isolators using the same DW package.