Dual comparator for threshold detection and signal conditioning
The Texas Instruments TLC393IP is a dual general-purpose comparator built on the LinCMOS™ process. It compares two analog voltages per channel and outputs a logic-level signal via its open-drain MOS output stage. With a 4.5 µs propagation delay and 5 pA typical input bias current, it suits slow-to-moderate-speed threshold detection, zero-crossing detectors, window comparators, and sensor interface circuits where the input signal must not be loaded. The industrial temperature range (-40°C to 85°C) qualifies it for factory-floor sensor panels, outdoor telecom line cards, and HVAC controller boards.
Low power draw and high input impedance
Quiescent current maxes at 65 µA for both comparators, making this part a fit for loop-powered transmitters and battery-backed alarm circuits where every microamp counts. The 5 pA input bias at 5 V means the comparator presents essentially no load to a high-impedance source — think pH probe buffers, photodiode current thresholds, or resistive divider references that cannot tolerate a few nanoamps of leakage.