The MAX6328UR28 from Maxim Integrated is a precision, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with 2.8V-powered circuits.

Key Features

• Voltage Monitoring: This device ensures that the system voltage is at an appropriate level, with a factory preset reset threshold voltage of 2.8V, making it ideal for 2.8V-powered systems.
• Low Power Consumption: The MAX6328UR28 is optimized for low-power consumption, drawing only a 1µA supply current, which is crucial for battery-operated portable devices.
• Reset Output Stage: It includes an active-low reset output, which provides a reset signal to the microprocessor during power-up, power-down, and brownout conditions. The reset output remains operational with VCC as low as 1.2V.
• High Accuracy: The reset threshold accuracy is ±1.5% over the entire temperature range, ensuring reliable monitoring and system protection.
• Temperature Range: The device operates over an extended temperature range of -40°C to +85°C, suitable for industrial applications.
• Package Options: It is available in a compact SOT23-3 package, saving space on PCBs.

Applications

The MAX6328UR28 is versatile for use in a variety of applications where precise voltage supervision is critical. These include portable/battery-powered equipment, embedded controllers, intelligent instruments, and critical µP and µC power monitoring.

Conclusion

Maxim Integrated's MAX6328UR28 voltage supervisor IC is a robust solution for systems that require accurate and reliable voltage monitoring. Its combination of low power consumption, high accuracy, and small form factor makes it an excellent choice for designers looking to enhance system integrity with minimal impact on power budgets and board space.