... , and a separate power supply, low-power, 8-bit CMOS data acquisition devices. The PCF8591 has the four analog inputs, one analog ... PCF8591 operating voltage range of 2.5V-6V low standby current via I2C bus serial input / output PCF8591 by 3 hardware ... by a through-hole, aperture: 3mm, convenient fixedThree-module interface specification The module on the left and right, respectively, to expand outside ...