Mouser Electronics is now stocking the TPS3840 family of nanopower high-input voltage supervisors from Texas Instruments. The TPS3840 devices are reset ICs that can operate at up to 10V, while maintaining very low quiescent current across all operating conditions. The devices provide a combination of minimal power consumption, high accuracy, and low propagation delay to help extend battery life for a variety of low-power, industrial, and battery-powered applications.
TI’s TPS3840 voltage supervisors, available from Mouser Electronics, deliver a broad input voltage of 1.5V to 10V, which enables the monitoring of 9V rails or batteries, with no external components, as well as 24V rails with external resistors. The devices’ nano-quiescent current (nano-Iq) of 350nA (typical) increases battery life for low-power applications, reducing current consumption whens those external resistors. With under 1µA current consumption, the ICs can be configured to work as both a comparator (with a simple three-pin configuration) or as a daisy-chained universal power supply supervisor that acts as a sequencer.
The devices’ fast start-up delay allows the detection of a voltage fault before the rest of the system powers up, providing maximum safety in hazardous start-up fault conditions, and the low power-on-reset (VPOR) prevents false resets, premature enable or turn-on of next device, and proper transistor control during power-up and power-down. Additional features include a one per cent typical monitor threshold accuracy, built-in glitch immunity protection for manual reset and VDD, built-in hysteresis, and low open-drain output leakage current.
The TPS3840 voltage supervisors are available in a five-pin, industry-standard SOT-23 package, with three output topology options: open-drain, active-low (TPS3840DL); push-pull, active-low (TPS3840PL); and push-pull, active-high (TPS3840PH). Target power management applications, including grid infrastructure equipment, such as circuit breakers, smart metres, and other monitoring and protection equipment; factory and building automation; electronic point of sale devices; and portable and battery-powered systems.
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