Datasheet for the SN7485N, a 4-bit magnitude comparator in a plastic DIP package, as a 15.3 KB PDF. It describes the pinout, the A greater than, equal to and less than outputs, the cascading inputs used for wider words, and electrical characteristics. It is useful when diagnosing address-decode or comparison logic on older digital equipment, since you can predict each output from the input states. Confirm the marking and family before replacing the device.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @datasheet_technar_org. Enginerys does not host this file.
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The standard format for schematics, block diagrams, power-sequence charts and service manuals.