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   ISO1540 is a low-power, 1-isolated bidirectional splitter, compatible with the I2C interface, compatible with I2C, and compatible with the I2C communication interface. These devices have their logic inputs and support output buffers for operation up to 1 MHz.

ISO1540 uses TI’s capacitive isolation and 3-V to 5.5-V power supply from a silicon dioxide barrier. Isolate their logic input and output buffers. When used with isolated power supplies, these devices protect against high voltages, and isolated grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuits.

Capacitive isolation used by ISO1540 Compared to optocouplers, this isolation technique offers advantages in functionality, performance, size, and power consumption.

The ISO1540 supports a fully isolated small form factor I2C interface.

ISO1540 not only has two isolated bidirectional channels for clocks and data lines but is also suitable for multi-master device applications. Two-way communication within these devices is achieved by preventing an internal logic latch by offsetting a low-level output voltage (which will occur in a standard digital isolator).

ISO1540 property:

•The 4kV mannequin (HBM) electrostatic discharge protection on all pins; 8kV on the bus pin

•Open leak output with filling current capacity at 3.5mA end 1 and 35mA 2.

•-40 C to 125 C operating temperature range

•± 50kV / s transient disturbance resistance (typical value)

•Support for up to 1MHz runs

•The 3V to 5.5V power supply range