1 Features

• Signaling Rate: 25 Mbps
• Integrated Noise Filter on the Inputs
• Default Output 'High' and 'Low' Options
• Low Power Consumption: Typical I_CC per Channel at 1 Mbps:
  • ISO7320: 1.2 mA (5 V Supplies),
    0.9 mA (3.3 V Supplies)
  • ISO7321: 1.7 mA (5 V Supplies),
    1.2 mA (3.3 V Supplies)
• Low Propagation Delay: 33 ns
  Typical (5V Supplies)
• 3.3 V and 5 V Level Translation
• Wide Temperature Range: –40°C to 125°C
• 65 KV/μs Transient Immunity,
  Typical (5V Supplies)
• Robust Electromagnetic Compatibility (EMC)
  • System-level ESD, EFT, and Surge Immunity
  • Low Emissions
• Isolation Barrier Life: > 25 Years
• Operates from 3.3 V and 5 V Supplies
• Narrow Body SOIC-8 Package
• Safety and Regulatory Approvals:
  • 4242 V_PK Isolation per DIN V VDE V 0884-10 and DIN EN 61010-1
  • 3000 V_RMS Isolation for 1 minute per UL 1577
  • CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 Standards
  • CQC Certification per GB4943.1-2011

2 Applications

• Opto-Coupler Replacement in:
  • Industrial FieldBus
    • ProfiBus
    • ModBus
    • DeviceNet™ Data Buses
  • Servo Control Interface
  • Motor Control
  • Power Supplies
  • Battery Packs

3 Description

ISO732x provide galvanic isolation up to 3000 V_RMS for 1 minute per UL and 4242 V_PK per VDE. These devices have two isolated channels comprised of logic input and output buffers separated by silicon dioxide (SiO₂) insulation barriers. ISO7320 has both channels in the same direction while ISO7321 has the two channels in opposite direction. In case of input power or signal loss, default output is 'low' for devices with suffix 'F' and 'high' for devices without suffix 'F'. See Device Functional Modes for further details. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry. ISO732x have integrated noise filters for harsh industrial environment where short noise pulses may be present at the device input pins. ISO732x have TTL input thresholds and operate from 3 V to 5.5 V supply levels. Through innovative chip design and layout techniques, electromagnetic compatibility of ISO732x have been significantly enhanced to enable system-level ESD, EFT, Surge and Emissions compliance.

1. For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Schematic

1. V_CCI and GNDI are supply and ground connections respectively for the input channels.

2. V_CCO and GNDO are supply and ground connections respectively for the output channels.