10PCS PCF8575TS Expansion Board I2C Communication Control 16 IO Port For Arduino

Are the I / O pins exhausted?. On board 3.3V level converter circuit, if you don't solder pad of VCC-VDD, the PCF8575 level is 3.3V. Open drain interrupt output pin for input change interruption. Am 25.03.2023 hat der Verkäufer die folgenden Angaben hinzugefügt.

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