I2C bus is a two-wire, bidirectional serial bus, particularly suitable for communication between ICs on or between boards. To meet system safety specifications, avoid noise signal interference during communication, and prevent damage to sensitive components, it is necessary to incorporate I2C isolator devices into the system. Today, I would like to recommend a domestic I2C isolator device that can replace TI’s ISO1540.
1. Overview
A low-power, bidirectional isolator compatible with the I2C interface, utilizing silicon dioxide medium isolation for input and output, can block high voltage and prevent noise current from entering the control side, avoiding circuit interference and damage to sensitive components.
It features two bidirectional isolation channels, applied to isolate the clock and data lines, suitable for applications using multiple master devices.
The device has low power consumption, short delay, high speed, and good EMC performance, widely used in Ethernet Power over Ethernet (POE) systems, battery management systems (BMS), and -48V distributed power supply systems.
2. Key Features
1. Compatible with I2C isolated bidirectional communication
2. Ultra-low power consumption
3. Supports communication rates up to 2MHz
4. Open-drain output
Output sinking current on one side is 3.5mA
Output sinking current on the other side is 35mA
5. Supply voltage from 3.0V to 5.5V
6. High common-mode transient immunity: 120 kV/µs (typical)
7. Certified to automotive AEC-Q100 standards
8. Wide operating temperature range: -40°C ~ 125°C
9. RoHS compliant NB SOIC-8 package
3. Application Scenarios
1. Isolating I2C, SMBus, PMBus interfaces
2. Electric and hybrid vehicles
3. Open-drain output networks
4. Secondary power supplies
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