Hot-swappable, robust-EMC bidirectional I²C Isolators with 3 GPIOs

The ISO1640, ISO1641, ISO1642, ISO1643 and ISO1644 (ISO164x) device s are

hot swappable, low-power, bidirectional

isolator s that are

compatible with I2C interfaces. The ISO164x supports UL 1577 isolation

ratings of 5000 VRMS in the 16-DW package, and 3000 VRMS in

the 8-D package. Each I2C isolation channel in this low emissions device

has a logic input and open drain output separated by a double capacitive silicon

dioxide (SiO2) insulation barrier. The

ISO1642 and ISO1643 intregrates 2 unidirectional CMOS isolation channels, while

the ISO1644 intregrates 3 unidirectional CMOS isolation channels which can be

used for static GPIO isolation or to isolate a Serial Peripheral Interface (SPI)

bus. This family includes basic and reinforced insulation devices certified

by VDE, UL, CSA, TUV and CQC. The ISO1640/2/3/4

have two isolated

bidirectional channels for clock and data lines

and the ISO1641 has a bidirectional data and a unidirectional clock

channel. The ISO164x family

integrates

logic required to support bidirectional channels, providing a much simpler design

and smaller footprint when compared to optocoupler-based solutions.