I want to use the outputs of the pcf8574 by turning on LED's but there s a
problem.
As i saw in the datasheet of PCF8574 the outputs are STRONG High only during
the up transition of the pulse and doesn't stay in this status.

So the Led turns on for a small time and then goes off.
So maybe  need an external Latch to keep the outputs of PCF8574's state?.

Thanks.
fm1@poboxes.com