Texas Instruments ISO1540DR 2.5kVrms I2C Isolator, SOIC-8

The Texas Instruments ISO1540DR is a low-power, bidirectional isolator specifically designed for I2C interfaces. This device incorporates Texas Instruments' capacitive isolation technology, using a silicon dioxide (SiO2) barrier to separate logic input and output buffers. When used with isolated power supplies, it effectively blocks high voltages, isolates grounds, and prevents noise currents from entering the local ground, thereby protecting sensitive circuitry from interference or damage.

Key Features

• Supports isolated bidirectional, I2C-compatible communication
• Operates at up to 1MHz
• Wide supply voltage range: 3V to 5.5V
• Open-drain outputs with 3.5mA (Side 1) and 35mA (Side 2) sink current capability
• Operating temperature range: –40°C to +125°C
• Typical transient immunity: ±50kV/µs
• HBM ESD protection: 4kV on all pins, 8kV on bus pins

Specifications

• No. of Channels: 2
• Supply Voltage Min: 3V
• Supply Voltage Max: 5.5V
• IC Case / Package: SOIC
• No. of Pins: 8
• Operating Temperature Min: –40°C
• Operating Temperature Max: 125°C

With its robust isolation and high-speed capability, the ISO1540DR is an ideal solution for I2C communication in systems requiring galvanic isolation, ensuring reliable data transfer and enhanced system safety.