TI ISOW7844FDWER

ISOW784x is a series of high-performance quad-channel reinforced digital isolators with an integrated high-efficiency power converter. The integrated DC/DC converter operates efficiently, delivering up to 650 mW of isolated power and is configurable for various input and output voltages. As a result, these devices eliminate the need for a separate isolated power supply in space-constrained isolated designs.

When isolating CMOS or LVCMOS digital I/O, the ISOW784x series devices provide high electromagnetic immunity and low emissions. The signal isolation channels feature logic input and output buffers separated by dual-capacitor silicon dioxide (SiO₂) insulation barriers, while power isolation uses an on-chip transformer with thin-film polymer as the insulating material. Various forward and reverse channel configurations are available. If the input signal is lost, ISOW784x devices without the F suffix default to a high output, while devices with the F suffix default to a low output.

These devices help prevent noise currents on data buses (e.g., RS-485, RS-232, and CAN) or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. Through innovative chip design and layout techniques, the EMC performance of these devices is significantly enhanced, mitigating system-level ESD, EFT, and surge issues while meeting radiated emissions standards. The high power converter efficiency enables operation at elevated ambient temperatures. The devices are available in a 16-pin wide-body SOIC (SOIC-WB) DWE package.

• 100 Mbps data rate
• Robust isolation barrier:

  • 100-year projected lifetime at 1 kV RMS working voltage

  • Isolation rating up to 5000 VRMS
  • Surge immunity up to 10 kV PK
  • ±100 kV/μs minimum CMTI
• Integrated high-efficiency DC/DC converter with on-chip transformer
  • 3V to 5.5V wide supply voltage range
  • 5V or 3.3V regulated output
  • Output power up to 0.65W
  • 5V to 5V; 5V to 3.3V: available load current ≥130 mA
  • 3.3V to 3.3V: available load current ≥75 mA
  • 3.3V to 5V: available load current ≥40 mA
• Soft-start to limit inrush current
• Overload and short-circuit protection
• Thermal shutdown
• Default output: high and low options
• Low propagation delay: 13 ns (typical, 5V supply)
• Excellent EMC performance
  • System-level ESD, EFT, and surge immunity
  • ±8 kV IEC 61000-4-2 contact discharge protection across the isolation barrier
  • Low emissions
• 16-pin wide-body SOIC package
• Operating temperature range: -40°C to +125°C
• Safety-related certifications:
  • 7071 VPK reinforced isolation per DIN V VDE V 0884-11:2017-01
  • 5000 VRMS isolation for 1 minute per UL 1577
  • CSA certification per IEC 60950-1, IEC 62368-1, and IEC 60601-1 end-equipment standards
  • CQC certification per GB4943.1-2011
  • TUV certification per EN 60950-1 and EN 61010-1

• Industrial Automation
• Motor Control
• Power Grid Infrastructure
• Medical Equipment
• Test and Measurement