Active dual comparator for low-power threshold sensing
The TLC393CPW is an active-production dual comparator from Texas Instruments' LinCMOS™ series, built for battery-aware threshold detection and zero-crossing circuits where every microamp counts. It draws a maximum quiescent current of 50 µA across both comparators, with a propagation delay of 4.5 µs — fast enough for overcurrent or undervoltage lockout loops in portable gear.
Supply range and input characteristics
Input bias current is a maximum 5 pA at 5 V — negligible for high-impedance sensor dividers or photodiode front-ends — and the common-mode rejection ratio is 84 dB typical. Maximum input offset voltage is 5 mV at 10 V, which is adequate for general-purpose window comparators and level translators.
Open-drain output and temperature grade
The open-drain output (MOS) can sink up to 20 mA typical, making it easy to wire-OR multiple comparators or drive a logic input without a pull-up resistor tied to the comparator supply.