PCF8574A PDF File ( Datasheet )

PCF8574; PCF8574A Remote 8-bit I, O expander for I2C-bus with interrupt Rev. 5 27 May 2013 Product data sheet 1. General description The PCF8574, 74A provides general-purpose remote I, O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)). The devices consist of eight quasi-bidirectional ports, 100 kH- I2C-bus interface, three hardware address inputs and interrupt output operating between 2.5 V and 6 V. The quasi-bidirectional port can be independently a