MAX6314US28D4

Supervisors Overview

The MAX6314US28D4+T is a low-power CMOS microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range of 1.7V to 5.5V and features a fixed threshold voltage of 2.80V for power monitoring. The device provides a bidirectional RESET output compatible with microprocessors such as the 68HC11, eliminating the need for external components. Key electrical parameters include a reset delay time of 200ms, an accuracy of 1.8%, and a maximum operating temperature of +85°C. It draws a typical quiescent current of 5µA and is housed in a compact SOT-143-4 surface-mount package.

Supervisors Feature Summary

• Bidirectional RESET output designed for direct connection to microprocessors with bidirectional reset inputs
• Low-power CMOS construction with minimal quiescent current consumption
• Integrated manual reset input capability for system control
• Fixed threshold voltage supervision without requiring external adjustments

Supervisors Applications

• Microprocessor (µP) power supply monitoring in digital systems
• Supervision for 68HC11 and similar bidirectional-compatible microcontrollers
• Battery-powered devices requiring low standby current
• Embedded systems needing reliable power-fail detection

Supervisors Procurement Notes

Verify the specific suffix D4 corresponds to the 2.80V threshold variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the SOT-143-4 package matches your PCB footprint requirements. Cross-reference the full part number including the +T tape-and-reel designation if applicable. Validate that the bidirectional output logic aligns with your target microprocessor's reset pin specifications.

Supervisors Selection Notes

Select this component when a bidirectional reset interface is required for compatibility with legacy or specific microcontroller architectures. The fixed 2.80V threshold suits applications where the supply rail typically operates above this level. Consider the 200ms reset delay for systems tolerant of startup transients. The low 5µA current draw makes it suitable for battery-operated designs. Verify that the 1.8% accuracy meets your system's noise margin requirements.

Supervisors Part Context

The MAX6314 series belongs to Maxim Integrated's family of low-power microprocessor supervisory circuits. These devices are engineered to replace discrete resistor-capacitor networks and comparators, simplifying board design. The US28D4 suffix indicates a specific threshold voltage variant within the broader MAX6314 lineup, tailored for precise voltage monitoring applications in consumer and industrial electronics.

Supervisors Replacement Considerations

Check for MAX6314 variants with different threshold voltages (e.g., US26D3 for 2.63V) if voltage levels differ. Verify pinout compatibility with other SOT-143-4 supervisory ICs from Analog Devices or third-party manufacturers. Ensure bidirectional output functionality is supported by alternative parts if replacing with non-Maxim equivalents.