ISO1640: Vol of ISO1640 vs ISO1540 for Side 1

Darshan Shah

Part Number: ISO1640
Other Parts Discussed in Thread: ISO1540,

Does ISO1640 has lower Vol for Side 1 compared to ISO1540 which has Vol range of 570mV to 800mV?

I am looking for i2c isolator which has lower Vol. We are hitting Vil violation due to high Vol from the isolator.

0 Andrew J 9 months ago

Hello Darshan,

Thanks for reaching out. The VOL of ISO1640 is 570-710mV. All bidirectional and I2C isolators will have a side one offset like this to prevent latch-up conditions. See (+) [FAQ] Why is the logic LOW level output voltage, VOL1, up to 0.8V on Side1 of the ISO1540/ISO1541 and ISO1640/ISO1641 bidirectional I2C isolators? for more details.

Best,
Andrew

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