ISO764xFM Low-Power Quad-Channel Digital Isolators

1 Features

• Signaling Rate: 150 Mbps
• Low Power Consumption, Typical I_CC per Channel (3.3-V Supplies):
  • ISO7640FM: 2 mA at 25 Mbps
  • ISO7641FM: 2.4 mA at 25 Mbps
• Low Propagation Delay: 7-ns Typical
• 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, 3.3-V, and 5-V Supply and Logic Levels
• Wide Body SOIC-16 Package
• Safety and Regulatory Approvals
  • 6000 V_PK / 4243 V_RMS for 1 Minute per UL 1577
  • VDE 6000 V_PK Transient Overvoltage, 1414 V_PK Working Voltage per DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
  • CSA Component Acceptance Notice 5A, IEC 60950-1, IEC 61010-1, and IEC 60601-1 End Equipment Standards
  • TUV 5 KV_RMS Reinforced Insulation per EN/UL/CSA 60950-1 and EN/UL/CSA 61010-1
  • CQC Reinforced Insulation per GB4943.1-2011

2 Applications

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

3 Description

ISO7640FM and ISO7641FM provide galvanic isolation up to 6 KV_PK for 1 minute per UL and VDE. These devices are also certified up to 5-KV_RMS Reinforced isolation at a working voltage of 400 V_RMS per end equipment standards EN/UL/CSA 60950-1 and 61010-1. ISO7640F and ISO7641F are quad-channel isolators; ISO7640F has four forward and ISO7641F has three forward and one reverse-direction channels. Suffix F indicates that output defaults to Low-state in fail-safe conditions (see Table 4). M-Grade devices are high-speed isolators capable of 150-Mbps data rate with fast propagation delays.

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, 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 data sheet.

Simplified Schematic