The PCF8591 is a monolithic single supply low power 8-bit CMOS data acquisition device. PCF8591 has four analog inputs, one analog output and a serial I2C bus interface.
The CD4069BM is consist of six CMOS inverter circuits. These devices are intended for all general-purpose inverter applications where the medium-power TTL-drive and logic-level-conversion capabilities of circuits such as the CD4049 hex inverter.