1 Features

• Signaling Rate: 150 Mbps (M-Grade), 25 Mbps (C-Grade)
• Robust Design with Integrated Noise Filter
  (C-Grade)
• Low Power Consumption, Typical I_CC per Channel (3.3-V Supplies):
  • ISO7631FM: 2 mA at 10 Mbps
  • ISO7631FC: 1.5 mA at 10 Mbps
  • ISO7641FC: 1.3 mA at 10 Mbps
• Extremely-Low I_{CC_disable} (C-Grade)
• Low Propagation Delay: 7 ns Typical (M-Grade)
• Output Defaults to Low-State in Fail-Safe Mode
• Wide Temperature Range: –40°C to 125°C
• 50 KV/µs Transient Immunity, Typical
• Long Life With SiO₂ Isolation Barrier
• Operates From 2.7-V (M-Grade), 3.3-V and 5-V Supply and Logic Levels
• 2.7-V (M-Grade), 3.3-V and 5-V Level Translation
• Wide Body SOIC-16 Package
• Safety and Regulatory Approvals
  • 2500 V_RMS Isolation for 1 Minute per UL 1577
  • 4242 V_PK Basic Insulation per DIN V VDE V 0884-10 and DIN EN 61010-1
  • CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 End Equipment Standards
  • CQC Certification per GB4943.1-2011
  • TUV 3000 V_RMS Reinforced Insulation according to EN/UL/CSA 60950-1 and EN/UL/CSA 61010-1

2 Applications

• Optocoupler Replacement in:
  • Industrial Fieldbus
    • Profibus
    • Modbus
    • DeviceNet™ Data Buses
  • Servo Control Interface
  • Motor Control
  • Power Supplies
  • Battery Packs

3 Description

The ISO7631F and ISO7641F devices provide galvanic isolation up to 4242 V_PK per VDE. The ISO7631F device has three channels, two of which operate in the forward direction and one which operates in the reverse direction. The ISO7641F device has 4 channels, three of which operate in the forward direction and one of which operates in the reverse direction. Suffix F indicates that output defaults to low-state in fail-safe conditions (see ). M-Grade devices are high-speed isolators capable of up to150-Mbps data rates with fast propagation delays, whereas C-Grade devices are capable of up to 25-Mbps data rates with low power consumption and integrated filters for noise-prone applications. C-Grade devices are recommended for lower-speed applications where input noise pulses of less than 6 ns duration must be suppressed, or when low-power consumption is critical.

Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO₂) insulation barrier. 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. The devices have TTL input thresholds and can operate from 2.7-V (M-Grade), 3.3-V and 5-V supplies. All inputs are 5-V tolerant when supplied from 3.3-V or 2.7-V supplies.

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.