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BUY LM339AM https://www.utsource.net/itm/p/11212390.html
IC COMPARATOR QUAD 14-SOP
Description: Quad Differential Comparator Feature: Wide Single Supply Voltage Range or Dual Supplies: 3 V to 32 V Low Supply Current Drain (800 μA) Outputs Can Drive Up to 10 LSTTL Loads Low Input Bias Current: 25 nA Low Input Offset Voltage: 2 mV Differential Input Voltage Range Equal to the Power Supply Voltage Internal Frequency Compensation Output Short-Circuit Protection Latch-Up Free Operation Application: Voltage Monitoring Temperature Switching Pulse Width Modulation Motor Speed Control Zero Crossing Detection Time Delay Generation Logic Level Conversion Window Comparators (For reference only)