MAX6468US46D3

Overview

The MAX6468US46D3 is a microprocessor supervisory reset circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors single power-supply voltages ranging from +1.8V to +5.0V and asserts a reset signal if the supply voltage drops below its preset threshold. The device features an edge-triggered, one-shot manual reset function that ensures the microprocessor enters reset mode for a fixed timeout period only, even during continuously asserted manual resets. It operates within a temperature range of -40°C to +125°C.

Feature Summary

• Edge-triggered, one-shot manual reset function prevents indefinite reset states
• Factory-trimmed threshold options eliminate external components
• Active-low push-pull output for direct microprocessor interface

Applications

• Microprocessor system reliability enhancement
• Single power-supply voltage monitoring
• Embedded systems requiring fixed timeout reset periods

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and lead times directly with suppliers. Check for obsolescence notices as this series may have limited availability. Ensure packaging specifications match design requirements before procurement.

Selection Notes

Select based on required threshold voltage accuracy and operating temperature range. Consider the active-low output polarity compatibility with target microprocessor reset inputs. Evaluate package size constraints against available footprint options in the SC-70 or SOT-143 form factors.

Part Context

Part of the MAX6467/MAX6468 family of microprocessor supervisory circuits designed for improved system reliability over traditional manual reset designs. These circuits provide factory-set thresholds for common supply voltages including +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V variants.

Replacement Considerations

Cross-reference tools indicate parametrically similar parts are available. Verify threshold voltage matching and package compatibility when selecting substitutes. Check manufacturer documentation for updated part numbering systems and potential pinout differences.