Aptinex I2C Isolator – ISO1540D

Aptinex I2C Isolator module comprises a ISO1540, which is a low-power, bidirectional isolating chip for I2C interfaces. This is a low cost solution for isolating your I2C devices in both testing and production environments.

ISO1540

The ISO1540 and ISO1541 devices are low-power, bidirectional isolators that are compatible with I2C interfaces. These devices have logic input and output buffers that are separated by Texas Instruments Capacitive Isolation technology using a silicon dioxide (SiO2) barrier. When used with isolated power supplies, these devices block high voltages, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry.

Features

• Isolated bidirectional, I2C compatible, communication
• Supports up to 1-MHz operation
• 3-V to 5.5-V supply range
• Open-drain outputs With 3.5-mA Side 1 and 35-mA Side 2 sink current capability
• –40°C to +125°C operating temperature
• ±50-kV/µs transient immunity (Typical)
• HBM ESD protection of 4 kV on all pins;
• 8 kV on bus pins

Safety-related certifications:

• 4242-VPK isolation per DIN VDE V 0884-11:2017-01
• 2500-VRMS isolation for 1 minute per UL 1577
• CSA approval per IEC 60950-1 and IEC 62368-1 end equipment standards
• CQC basic insulation per GB4943.1-2011