ISO1540DR Bidirectional I2C Isolator – 2500Vrms SOIC-8

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 V_RMS for 1 minute (UL 1577)
• CMTI: 50 kV/µs typical
• SDA Line: Bidirectional
• SCL Line: Bidirectional
• Supply Voltage (V_CC): 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 = V_CC1, Pin 2 = SDA1, Pin 3 = SCL1, Pin 4 = GND1 | Pin 5 = GND2, Pin 6 = SCL2, Pin 7 = SDA2, Pin 8 = V_CC2

Package Includes

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

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