74HC85 (4-bit Magnitude Comparator) water sensor An IR blocking filter

An IR blocking filter

Timekeeping operation continues while the part operates from the backup supply

Symmetrical output impedance

74HC11 is a triple 3-input AND gate

74HC85 (4-bit Magnitude Comparator) water sensor An IR blocking filterIntroduction : 74HC85 is a 4 bit magnitude comparator that can be expanded to almost any length. They perform comparison of two 4 bit binary, BCD or other monotonic codes and present the three possible magnitude results at the outputs (QA>B, QA=B and QA<B). The 4 bit inputs are weighted (A0 to A3 and B0 to B3), where A3 and B3 are the most significant bits. For proper compare operation the expander inputs (IA>B, IA=B and IA<B)to the least significant