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PCF8574A: no output work

Part Number: PCF8574A
Other Parts Discussed in Thread: ULN2803A

Hi all,

I'm trying to change my older PCF8574AP marked NXP with the PCF8574AN marked Texas Instrument, the problem is that with a working board mounted with the PCF8574AP the Output (2803+relay) works well, if I change with the new device no outputs work. The I2C address is set to be 0x7E. Any idea?

Thanks.