BUY 74LS85 https://www.utsource.net/itm/p/1036392.html
LOW POWER SCHOTTKY
Part #: 74LS85 Description: 4-Bit Magnitude Comparator Features: - 16-DIP package - Operates over a wide range of supply voltage: 2V to 6V - Low power consumption: 0.4 mW/comparator at 5V - High noise immunity: 0.45 VDD (typical) Applications: - 4-bit ALU - Magnitude comparators - Square root units - Sequence detectors and decoders - Arithmetic logic units - Multipliers - Digital control systems - Pulse rate measurement
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