Texas Instruments Voltage Supervisor 3-Pin 3.23 V Threshold, 4.63 V Monitored Voltage SOT-23 Package LM809M3-4.63/NOPB

Texas Instruments LM809M3-4.63/NOPB is a precision voltage supervisor designed to monitor supply voltage levels in microprocessor systems and other electronic equipment. This 3-pin device provides a reset threshold voltage of 3.23 V and monitors voltages up to 4.63 V to ensure stable operation and prevent malfunction due to supply voltage dips.

The device is housed in a compact SOT-23 surface mount package measuring 2.92 mm in length, 1.3 mm in width, and 930 μm in height, making it suitable for space-constrained applications. Its active low output driver simplifies system integration for supervisory and reset signaling.

The LM809M3-4.63/NOPB operates reliably over a wide temperature range from -40°C to 105°C and supports supply voltages from 1 V minimum up to 5.5 V maximum, accommodating various low voltage microprocessor systems. The reset active time is 840 milliseconds, providing a stable reset pulse for microcontroller initialization.

This voltage supervisor does not require a watchdog timer or manual reset feature, focusing on essential supply monitoring for microprocessor reset circuits. The device is primarily used in applications such as desktop and laptop computers, test and measurement instruments, portable battery-powered devices, and multiple-output power supplies.

Monitored voltage of 4.63 V ensures accurate supply voltage supervision. Reset threshold voltage at 3.23 V triggers reset signaling promptly. Compact 3-pin SOT-23 package ideal for automated assembly. Wide operating temperature range of -40°C to 105°C supports harsh environments.

Active low output driver provides clear reset signals. Minimal supply voltage requirement enables use in low voltage systems. Reset active time of 840 milliseconds ensures proper system initialization. Surface mount design facilitates modern PCB layouts.

This voltage supervisor from Texas Instruments is an essential component for ensuring microprocessor systems maintain reliable startup and stable operation by monitoring the supply voltage effectively. Its compact form factor and electrical characteristics suit diverse industrial, laboratory, computing, and portable electronic applications.

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