Nanopower high-input voltage supervisor with manual reset

25th March 2019

Alex Lynn

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From Texas Instruments, the TPS3840 family of voltage supervisors or reset ICs can operate at high voltage levels while maintaining very low quiescent current across the whole VDD and temperature range. TPS3840 offers best combination of low power consumption, high accuracy and low propagation delay (tp_HL= 30 µs typical).

Reset output signal is asserted when the voltage at VDD drops below the negative voltage threshold (VIT-) or when manual reset is pulled to a low logic (VMR_L). Reset signal is cleared when VDD rise above VIT- plus hysteresis (VIT+) and manual reset (MR) is floating or above VMR_H and the reset time delay (tD) expires. Reset time delay can be programmed by connecting a capacitor between CT pin and ground. For a fast reset CT pin can be left floating.

Additional features include, low power-on reset voltage (VPOR), built-in glitch immunity protection for MR and VDD, built-in hysteresis, low open-drain output leakage current (ILKG(OD)). TPS3840 is a voltage monitoring solution for industrial applications and battery-powered / low power applications.

To learn more, click here.