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ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8
ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8
ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8
ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8
ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8
ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8
Texas Instruments

ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8

Product SKU: CC-001259
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Texas Instruments ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8
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  • Manufacturer Part No.
    ISO1540DR
  • SKU
    CC-001259
  • Manufacturer
    Texas Instruments (TI)
  • Device Type
    Bidirectional I2C / SMBus / PMBus Digital Isolator
  • Isolation Barrier
    Silicon Dioxide (SiO2) Capacitive
  • Isolation Voltage
    2500 VRMS for 1 minute (UL 1577)
  • CMTI
    50 kV/µs typical
  • SDA Line
    Bidirectional
  • SCL Line
    Bidirectional
  • Supply Voltage (VCC)
    3.0 V – 5.5 V DC (Side 1 and Side 2 independent)
  • Max Data Rate
    1 MHz (Fast-Mode Plus I2C)
  • Operating Temperature
    -40°C to +125°C
  • Package
    SOIC-8 / D-8
  • Packaging Options
    Cut Tape or Tape & Reel (2,500 pcs/reel)
  • Compliance
    RoHS, Pb-free, Halogen-free
  • Pin 1
    VCC1 (Side 1 Supply, 3.0–5.5V)
  • Pin 2
    SDA1 (Side 1 Bidirectional Data)
  • Pin 3
    SCL1 (Side 1 Bidirectional Clock)
  • Pin 4
    GND1 (Side 1 Isolated Ground)
  • Pin 5
    GND2 (Side 2 Isolated Ground)
  • Pin 6
    SCL2 (Side 2 Bidirectional Clock)
  • Pin 7
    SDA2 (Side 2 Bidirectional Data)
  • Pin 8
    VCC2 (Side 2 Supply, 3.0–5.5V)
  • Operating Function
    Bidirectional galvanic isolation of I2C/SMBus/PMBus communication lines
  • Applications
    Industrial Motor Drives, Battery Management Systems (BMS), SMPS/Inverters, Medical Instrumentation, PoE/Telecom
  • Suitable For
    Power Electronics Engineers, Industrial System Integrators, EMS Manufacturers, Automotive Engineers, Medical Device OEMs
  • Features
    SiO2 Capacitive Isolation Barrier, Bidirectional Open-Drain I2C, 50kV/µs CMTI, 3.3V/5V Cross-Logic Translation, Automotive-Grade Temperature, No External Direction Control Required
  • Function
    Bidirectional I2C isolator for galvanic separation of communication lines between low-voltage controllers and high-noise or high-voltage peripherals
  • Electrical Characteristics
    2500VRMS isolation, 50kV/µs CMTI, 1MHz max data rate, 3.0–5.5V VCC both sides, -40 to +125°C
  • Description
  • Specifications

The Texas Instruments ISO1540DR is a high-performance, low-power bidirectional I2C isolator IC designed for noise-heavy and high-voltage circuit environments. Housed in an industry-standard SOIC-8 surface-mount package, it utilizes a silicon dioxide (SiO₂) capacitive isolation barrier to safely separate digital communication paths. It is an essential component for safeguarding sensitive microcontrollers, eliminating ground loops, and ensuring robust signal integrity in industrial automation, electric vehicles, power supplies, and solar inverter networks.

Key Specifications

  • Manufacturer: Texas Instruments (TI)
  • Part Number: ISO1540DR
  • Interface: I2C, SMBus, and PMBus compatible
  • Isolation Voltage: 2500 VRMS for 1 minute (UL 1577)
  • CMTI: 50 kV/µs typical
  • SDA Line: Bidirectional
  • SCL Line: Bidirectional
  • Supply Voltage (VCC): 3.0 V to 5.5 V DC (both sides)
  • Max Data Rate: Up to 1 MHz (Fast-Mode Plus I2C)
  • Operating Temperature: -40°C to +125°C (automotive grade)
  • Package / Case: SOIC-8 / D-8
  • Compliance: RoHS, Pb-free, halogen-free
  • Pinout: Pin 1 = VCC1, Pin 2 = SDA1, Pin 3 = SCL1, Pin 4 = GND1 | Pin 5 = GND2, Pin 6 = SCL2, Pin 7 = SDA2, Pin 8 = VCC2

Package Includes

  • 1 x Texas Instruments ISO1540DR I2C Isolator IC (SOIC-8)

Note: Image is for representation purpose only.

Texas Instruments ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8

Everything you need to know about ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8 at a glance.

  • Manufacturer Part No.
    ISO1540DR
  • SKU
    CC-001259
  • Manufacturer
    Texas Instruments (TI)
  • Device Type
    Bidirectional I2C / SMBus / PMBus Digital Isolator
  • Isolation Barrier
    Silicon Dioxide (SiO2) Capacitive
  • Isolation Voltage
    2500 VRMS for 1 minute (UL 1577)
  • CMTI
    50 kV/µs typical
  • SDA Line
    Bidirectional
  • SCL Line
    Bidirectional
  • Supply Voltage (VCC)
    3.0 V – 5.5 V DC (Side 1 and Side 2 independent)
  • Max Data Rate
    1 MHz (Fast-Mode Plus I2C)
  • Operating Temperature
    -40°C to +125°C
  • Package
    SOIC-8 / D-8
  • Packaging Options
    Cut Tape or Tape & Reel (2,500 pcs/reel)
  • Compliance
    RoHS, Pb-free, Halogen-free
  • Pin 1
    VCC1 (Side 1 Supply, 3.0–5.5V)
  • Pin 2
    SDA1 (Side 1 Bidirectional Data)
  • Pin 3
    SCL1 (Side 1 Bidirectional Clock)
  • Pin 4
    GND1 (Side 1 Isolated Ground)
  • Pin 5
    GND2 (Side 2 Isolated Ground)
  • Pin 6
    SCL2 (Side 2 Bidirectional Clock)
  • Pin 7
    SDA2 (Side 2 Bidirectional Data)
  • Pin 8
    VCC2 (Side 2 Supply, 3.0–5.5V)
  • Operating Function
    Bidirectional galvanic isolation of I2C/SMBus/PMBus communication lines
  • Applications
    Industrial Motor Drives, Battery Management Systems (BMS), SMPS/Inverters, Medical Instrumentation, PoE/Telecom
  • Suitable For
    Power Electronics Engineers, Industrial System Integrators, EMS Manufacturers, Automotive Engineers, Medical Device OEMs
  • Features
    SiO2 Capacitive Isolation Barrier, Bidirectional Open-Drain I2C, 50kV/µs CMTI, 3.3V/5V Cross-Logic Translation, Automotive-Grade Temperature, No External Direction Control Required
  • Function
    Bidirectional I2C isolator for galvanic separation of communication lines between low-voltage controllers and high-noise or high-voltage peripherals
  • Electrical Characteristics
    2500VRMS isolation, 50kV/µs CMTI, 1MHz max data rate, 3.0–5.5V VCC both sides, -40 to +125°C
Brand / Vendor Texas Instruments
SKU CC-001259
Category Digital Isolator

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