... chip introduced The PCF8591 Is a monolithically integrated, and a separate power supply, low-power, 8-bit ... the four analog inputs, one analog output and a serial I2C bus interface. PCF8591 three address ... pins A0, A1 and A2 can be used in hardware address ... The module on the left and right, respectively, to expand outside the 2-way pin header, respectively, as follows: ...