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Up to 15mA Output Sink on All I/Os
High Level Voltage: 4
on-chip sensor
This is why it's called a knock sensor
74HC85 (4-bit Magnitude Comparator) 3144 Up to 15mA Output SinkIntroduction : 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
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