MAX6348UR45+

Overview

The MAX6348UR45+ is a single-channel microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors power-supply voltages with a fixed threshold of 4.5V and supports input monitoring for 2.5V, 3V, 3.3V, and 5V systems. The device features an active-low, open-drain output and operates within a supply voltage range up to 5.5V. It includes a reset delay time of 185 ms and consumes ultra-low supply current. The component is housed in a compact SOT-23-3 surface-mount package and functions reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Ultra-low power consumption with maximum supply current of 1µA
• Precision voltage monitoring for standard logic supply levels
• Compact SOT-23-3 surface-mount packaging for space-constrained designs

Applications

• Portable battery-powered electronic devices
• Embedded microprocessor system supervision
• Industrial control unit power monitoring

Procurement Notes

Verify the specific suffix (+T) when ordering reel quantities versus bulk tape. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected variant matches the required operating temperature range and package type for your specific PCB layout constraints.

Selection Notes

Select this component when a fixed 4.5V threshold is required for system supervision. It is suitable for applications prioritizing minimal quiescent current draw. Compare against adjustable threshold variants if precise voltage tuning is necessary. Ensure the open-drain output configuration aligns with the downstream logic interface requirements.

Part Context

This part belongs to the MAX6348 series of µP reset circuits designed for low-voltage, low-power applications. The series offers various fixed threshold options to monitor common digital logic supply rails. The UR45 designation specifically indicates the 4.5V threshold version packaged in the small outline transistor case.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.