Diodes Incorporated APX809S00-44SR-7 Microprocessor Reset Circuit

The APX809S00-44SR-7 is a highly precise microprocessor (µP) supervisory circuit designed to monitor the power supplies in digital systems. Manufactured by Diodes Incorporated, this essential component ensures that the system's microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. The device is specifically engineered to prevent any erroneous operation when the supply voltage falls below a designated threshold.

This supervisory circuit is available in a compact SOT-23 package, making it an excellent choice for space-constrained applications. It is characterized by its low power consumption and high accuracy, with a factory-trimmed reset threshold voltage of 4.4V. The APX809S00-44SR-7 offers a reset timeout period of 280ms (minimum), which provides a sufficient delay to ensure a proper system reset.

One of the key features of this product is its active-low, push-pull RESET output. This output type ensures that the connected µP is held in the reset condition until the system voltage has stabilized at the correct operating level and the reset timeout period has elapsed. This is crucial for maintaining system reliability and preventing any unpredictable behavior that could arise from voltage fluctuations.

The APX809S00-44SR-7 is designed to support a wide range of applications, including microprocessor-based systems, embedded controllers, portable and battery-powered equipment, and intelligent instruments. Its ability to provide a reliable reset signal makes it an indispensable component in systems that require a high level of uptime and stability.

Diodes Incorporated's commitment to quality means that the APX809S00-44SR-7 is built to meet the stringent requirements of modern electronic systems. It operates over a broad temperature range, ensuring functionality in diverse environments. The device also features immunity to short-duration transients on the power supply, which is critical for maintaining the integrity of the system in electrically noisy conditions.

In summary, the APX809S00-44SR-7 from Diodes Incorporated is a robust and reliable solution for system reset applications, offering designers a combination of precision, low power, and compact packaging to meet the needs of today's advanced digital systems.