MAX6390XS31D7+T

Supervisors Overview

The MAX6390XS31D7+T is a single-channel microprocessor supervisory circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 1.8V to 5.5V and features a factory-set reset threshold of 3.08V with ±2.5% accuracy. The device provides an active-low, open-drain reset output and includes a manual reset input. It consumes only 7µA of supply current and offers a fixed reset timeout delay of 2.4 seconds. The component is housed in an SC-70-4 surface-mount package and supports operation across an industrial temperature range from -40°C to +125°C.

Supervisors Feature Summary

• Monitors power-supply voltages and asserts reset when voltage falls below the specified threshold
• Includes a manual reset input for external control of the reset state
• Provides an active-low, open-drain reset output valid down to VCC = 1V
• Operates with low supply current consumption suitable for battery-powered applications

Supervisors Applications

• Microprocessor system supervision
• Portable electronic devices requiring low-power monitoring
• Industrial control systems operating in extreme temperatures
• Battery-operated equipment needing reliable power-fail detection

Supervisors Procurement Notes

Verify the exact suffix D7+T against official Analog Devices documentation to confirm lead-free status and tape-and-reel packaging specifications. Confirm that the XS31 designation corresponds to the 3.08V threshold variant. Check current lifecycle status as distribution data indicates potential discontinuation or limited availability in certain regions. Ensure compatibility with existing PCB footprint and thermal requirements before finalizing procurement plans.

Supervisors Selection Notes

Select this component when a precise 3.08V reset threshold is required for single-supervision applications. The open-drain output allows flexible interfacing with various logic families. Consider the 2.4s timeout duration to ensure it aligns with system startup requirements. Verify that the SC-70-4 package fits the design constraints. Evaluate if the manual reset feature meets specific operational needs compared to variants without this input.

Supervisors Part Context

This part belongs to the MAX6381–MAX6390 family of SC70/µDFN microprocessor reset circuits. These devices are designed for low-voltage, low-power applications. The MAX6390 series specifically distinguishes itself by including a manual reset input and offering a longer reset timeout period compared to other members of the family like the MAX6381 or MAX6382.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Analog Devices technical support for qualified replacements.