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BUY LM339AD https://www.utsource.net/itm/p/501820.html
QUAD DIFFERENTIAL COMPARATORS
Description: The LM339AD is a quad differential comparator IC from Philips Semiconductors. Features: - Low power consumption - Wide supply voltage range (2V to 36V) - Low input offset voltage - High input impedance - Low output saturation voltage - Low propagation delay - Outputs can source or sink up to 20mA Applications: - Voltage monitoring - Signal conditioning - Pulse width modulation - Motor control - Proximity sensing - Temperature sensing - Over-voltage and under-voltage protection - Level shifting - Waveform generation (For reference only)