Texas Instruments' TLV840 is a voltage supervisor or reset IC that can operate at high voltage levels while maintaining very low quiescent current across the whole V_DD and temperature range. The TLV840 offers a combination of low power consumption, high accuracy, and low propagation delay (tp_HL= 30 µs typical). A reset output signal is asserted when the voltage at V_DD drops below the negative voltage threshold (V_IT-). The reset signal is cleared when V_DD rises above VIT- plus hysteresis (V_HYS) and the reset time delay (t_D) expires. The reset time delay can be programmed by connecting a capacitor between the CT pin and ground for TLV840C and TLV840M. For a minimum reset delay time, the CT pin can be left floating.

The TLV840N does not offer a programmable delay and offers fixed reset delay timing options including 40 µs, 2 ms, 10 ms, 30 ms, 50 ms, 80 ms, 100 ms, 150 ms, and 200 ms. Additional features include low power-on reset voltage (V_POR), built-in glitch immunity protection for V_DD, built-in hysteresis, low open-drain output leakage current (I_lkg(OD)). The TLV840 is a perfect voltage monitoring solution for industrial applications and battery-powered and low-power applications.