TLV809E

The TLV809E is a precision voltage detector manufactured by Texas Instruments, designed to monitor supply voltages in electronic systems and provide a reliable reset signal when the voltage falls below a predetermined threshold. It operates with a fixed threshold of 3.0 V, making it suitable for applications requiring stable power management in low-voltage environments. The device features a very low quiescent current of typically 1.2 µA, which enhances battery life in portable and energy-sensitive designs. This voltage detector includes an active-low open-drain output that can interface directly with microcontrollers, logic circuits, or other digital systems without additional level-shifting components. Its output remains high while the supply voltage is above the threshold and pulls low when the voltage drops below it, effectively signaling a power failure or undervoltage condition. The TLV809E also incorporates a built-in hysteresis of approximately 50 mV, which prevents oscillation during transitions near the threshold and ensures clean, noise-immune operation. Designed for robust performance, the TLV809E supports a wide operating supply voltage range from 1.6 V to 5.5 V, enabling its use across various power domains including 1.8 V, 3.3 V, and 5 V systems. It is available in a compact SOT-23-5 package, ideal for space-constrained PCB layouts. The device is fully specified over the industrial temperature range of –40°C to +125°C, ensuring reliability in harsh environments such as automotive, industrial automation, and medical equipment. In addition to basic voltage monitoring, the TLV809E can be used in system initialization sequences where a clean reset is required upon power-up or power-down events. Its simplicity and low component count make it a cost-effective solution for enhancing system stability and preventing erratic behavior due to insufficient power levels. It is commonly integrated into embedded systems, IoT devices, battery-powered sensors, and consumer electronics where reliable power supervision is critical. The TLV809E is part of Texas Instruments’ broad portfolio of power management ICs, offering high accuracy, minimal power consumption, and excellent thermal performance. Its design emphasizes ease of integration, requiring no external resistors or capacitors for standard operation—reducing both BOM cost and board space. With its combination of precision, low power, and ruggedness, the TLV809E serves as a dependable companion for any application demanding consistent voltage monitoring and system reset functionality.