MAX6344MUT+

Overview

The MAX6344MUT+ is a microprocessor supervisory circuit from the MAX6342–MAX6345 family, designed to monitor power supplies in digital systems. It features a fixed reset threshold voltage of +4.38V and operates with supply voltages between +1V and +5.5V. 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 is housed in a 6-pin SOT-23 package (PDSO6). The component supports an operating temperature range from -40°C to +125°C.

Feature Summary

• Factory-trimmed fixed reset threshold voltage ensures accurate system supervision without external components.
• Integrated power-fail comparator enables monitoring of secondary supplies or battery status via a dedicated threshold detector.
• Active-low push-pull reset output drives loads directly while maintaining system reliability during power transitions.

Applications

• Monitoring main power rails in embedded digital systems
• Low-battery detection in portable electronic devices
• Power-fail warning generation for critical data protection

Procurement Notes

Verify the suffix '+T' or absence thereof against the specific datasheet revision, as packaging variations exist within the MAX6344 family. Confirm RoHS compliance status explicitly, as some variants in this series are noted as non-compliant in legacy databases. Ensure the manufacturer source is Analog Devices or Maxim Integrated to avoid counterfeit parts. Cross-reference the exact part number with official distributor catalogs for current availability and lead times.

Selection Notes

Select the MAX6344MUT+ when a fixed 4.38V reset threshold is required for single-channel supervision. This model is suitable for applications needing a power-fail indicator alongside the primary reset function. Consider the SOT-23-6 package for space-constrained designs. Verify that the 1V to 5.5V operating range aligns with the target system voltage levels before finalizing the component choice.

Part Context

The MAX6344MUT+ belongs to the MAX6342–MAX6345 family of µP reset circuits manufactured by Maxim Integrated, now part of Analog Devices. These devices replace discrete components to improve accuracy and reliability. The family offers various fixed thresholds and configurations, with the MAX6344 specifically providing a 4.38V threshold and power-fail capability in a compact surface-mount package.

Replacement Considerations

Direct substitutes include other members of the MAX6342–MAX6345 family with compatible thresholds, such as MAX6343 or MAX6345, provided the reset voltage matches the design requirement. Verify pin compatibility and output polarity before substitution.