Product Overview: APX809S-29SA-7 Voltage Supervisor IC

The APX809S-29SA-7 is a highly precise microprocessor (µP) supervisory circuit designed to monitor the power supply voltage of digital systems. Manufactured by Diodes Incorporated, this voltage supervisor ensures that the system's microcontroller is reset accurately and reliably during power-up, power-down, or brown-out conditions. It is an essential component for systems that require a stable and reliable operation over a wide range of supply voltages and environmental conditions.

This device features a fixed threshold voltage of 2.93V which makes it suitable for monitoring 3.3V power supplies. Upon detecting a voltage that falls below the factory-set threshold, the APX809S-29SA-7 asserts a reset signal to the connected microprocessor, holding it in reset until the system voltage stabilizes above the threshold. The reset signal remains asserted for a minimum of 240ms after the supply voltage exceeds the threshold, ensuring the system has adequate time to stabilize.

Available in a compact SOT-23 package, the APX809S-29SA-7 is designed for space-constrained applications. Its small footprint and low power consumption make it an ideal choice for portable and battery-operated devices. The device operates over a wide temperature range of -40°C to +85°C, allowing it to be used in various industrial and consumer applications.

Key features of the APX809S-29SA-7 include:

• Fixed threshold voltage of 2.93V tailored for 3.3V power supplies
• Low supply current of 17µA (typical) for power-efficient operation
• Minimum 240ms reset timeout to ensure system stability
• Operating temperature range of -40°C to +85°C for reliability in diverse environments
• Compact SOT-23 package suitable for space-sensitive designs

Overall, the APX809S-29SA-7 from Diodes Incorporated is a robust solution for system voltage monitoring, providing a simple yet effective way to enhance system reliability and prevent data corruption due to unpredictable power supply conditions. Its ease of integration and low power consumption make it a go-to choice for designers looking to safeguard their digital systems.