MAX6345MUT

Overview

The MAX6345MUT is a microprocessor supervisory circuit from the MAX6342–MAX6345 family, designed to monitor power supplies in digital systems. It operates with supply voltages between +1V and +5.5V and features a fixed reset threshold voltage of +4.38V. The device includes a +1.25V threshold detector for power-fail warning or low-battery detection. It provides an active-low push-pull reset output and lacks a manual reset input. The component is housed in a 6-pin SOT-23 package (PDSO6) and supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Factory-trimmed fixed reset threshold voltage ensures system reliability without external resistor networks.
• Integrated power-fail comparator allows monitoring of secondary supplies or battery levels via a dedicated threshold detector.
• Active-low push-pull reset output drives loads directly, eliminating the need for external pull-up components.

Applications

• Monitoring main power rails in embedded digital systems
• Low-battery detection circuits
• Power-fail warning generation

Procurement Notes

Verify the specific suffix 'MUT' against the manufacturer's current datasheet to confirm pinout and electrical characteristics match your design requirements. Confirm lead-free status and RoHS compliance details as regulatory standards evolve. Ensure the fixed 4.38V threshold aligns with your system's logic levels before finalizing procurement.

Selection Notes

Select this component when a fixed high-voltage reset threshold near 4.38V is required for 5V systems. It is suitable for designs needing a separate power-fail signal alongside the primary reset function. Consider the SOT-23 package size constraints and the absence of a manual reset input when evaluating alternative supervisory ICs.

Part Context

The MAX6345MUT belongs to the MAX6342–MAX6345 family of µP reset circuits manufactured by Maxim Integrated (now Analog Devices). This family offers various factory-trimmed thresholds ranging from 2.33V to 4.63V. The MAX6345 specifically targets applications requiring a higher reset threshold compared to lower-voltage variants like the MAX6342.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with other MAX634x series devices based on threshold voltage and package requirements.