MAX6357TZUT+

Overview

The MAX6357TZUT+T is a triple microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors three independent voltage inputs with preset thresholds of 1.8 V, 2.5 V, 3 V, 3.3 V, or 5 V. The device features active-low push-pull reset outputs and a manual reset input. It operates within a supply voltage range up to 5.5 V and consumes only 20 µA of quiescent current. The IC provides a fixed reset delay time of 280 ms and functions reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Monitors three distinct power-supply voltages simultaneously using precision factory-set thresholds.
• Provides active-low push-pull reset outputs that remain valid as long as any monitored supply exceeds 1.0 V.
• Includes a debounced manual reset input compatible with TTL and CMOS logic levels.

Applications

• Multi-rail embedded system power management
• Microprocessor board voltage supervision
• Industrial control unit power monitoring

Procurement Notes

Verify the exact suffix configuration against official datasheets, as variations exist within the MAX6357 family. Confirm component availability status directly with authorized distributors, as this specific part number may be discontinued or subject to limited supply constraints. Ensure RoHS compliance documentation matches project requirements before finalizing procurement orders.

Selection Notes

Select this component when simultaneous monitoring of three separate voltage rails is required in a compact footprint. The push-pull output architecture simplifies interface design compared to open-drain alternatives. Verify that the available threshold options align with the target system voltages, as internal resistor networks are factory-trimmed and cannot be adjusted externally.

Part Context

This device belongs to the MAX635x series of low-power supervisory circuits designed for enhancing system reliability. It integrates multiple voltage detectors into a single SOT-23-6 package, replacing discrete comparator solutions. The series supports various threshold combinations to accommodate standard logic and memory supply voltages commonly found in portable and industrial electronics.

Replacement Considerations

Cross-reference with other MAX6357 variants such as MAX6357TWUT+T for similar functionality. Note that alternative packages like SOT-23-5 may require pinout adaptation. Verify electrical compatibility regarding reset polarity and delay times before substituting with different series components.