MAX6328UR28

Overview

The MAX6328UR28+ is a voltage supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range up to 5.5 V and features an active low, open-drain output type. The device monitors a single input with fixed threshold voltages of 2.5 V, 3 V, 3.3 V, or 5 V. It includes a reset delay time of 280 ms and consumes a typical operating supply current of 500 nA. The component is housed in a SOT-23-3 package and supports surface mount installation. It functions without manual reset, watchdog timer, or battery backup switch capabilities.

Feature Summary

• Ultra-low-power consumption suitable for battery-operated systems
• Fixed threshold voltage options for precise monitoring
• Active low open-drain output configuration

Applications

• Portable electronic devices requiring power management
• Microprocessor system supervision
• Battery-powered equipment monitoring

Procurement Notes

Verify the specific suffix designation when ordering, as it determines the exact threshold voltage. Confirm availability status through authorized distributors, as some variants may have limited stock. Ensure the selected package matches the PCB footprint requirements. Check RoHS compliance documentation if environmental regulations apply to the final assembly process.

Selection Notes

Select this component based on the required voltage threshold and low quiescent current needs. Consider the SOT-23-3 package size for space-constrained designs. Evaluate the 280 ms reset delay against system startup timing requirements. Ensure the open-drain output interface is compatible with the downstream logic levels.

Part Context

This part belongs to the MAX6328U family of ultra-low-power reset circuits. It serves as a dedicated voltage monitor for microprocessors and memory devices. The series offers various threshold options to accommodate different nominal supply voltages. It is designed to replace discrete comparator-based solutions with a compact integrated alternative.

Replacement Considerations

Compatible substitutes include other MAX6328 variants with different threshold suffixes, such as MAX6328UR23 or MAX6328UR30. Verify pinout compatibility and electrical specifications before substitution.