MAX6468US46D3+T

Overview

The MAX6468US46D3+T is a microprocessor supervisory reset circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It monitors single power-supply voltages ranging from +1.8V to +5.0V and asserts an active-low, push-pull reset signal if the supply voltage drops below its preset threshold of 4.741V. The device features an edge-triggered, one-shot manual reset function that ensures the microprocessor enters reset mode for a fixed timeout period of 225ms, even during continuously asserted manual resets. Operating within a temperature range of -40°C to +125°C, it consumes only 7µA of quiescent current and supports a maximum supply voltage of 5.5V in a compact SOT-143-4 package.

Feature Summary

• Edge-triggered, one-shot manual reset function prevents indefinite reset states
• Factory-trimmed threshold voltage eliminates external components
• Active-low push-pull output drives microprocessor reset pins directly

Applications

• Microprocessor system supervision
• Single power-supply voltage monitoring
• Embedded controller reset management

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status (+ suffix indicates lead-free). Check datasheet revision for electrical parameter updates. Ensure storage conditions meet moisture sensitivity level requirements. Validate package marking against official specifications before integration.

Selection Notes

Select this part when monitoring a single supply rail near 4.74V with push-pull output requirements. Consider alternative thresholds if supply voltage differs significantly. Verify manual reset compatibility with system logic levels. Evaluate thermal performance within specified operating temperature range. Compare quiescent current against battery life requirements.

Part Context

The MAX6468 series belongs to Maxim Integrated's microprocessor supervisory circuit family designed for reliable system reset management. These circuits provide precise voltage monitoring with factory-calibrated thresholds, reducing design complexity by eliminating external resistor networks. The US46 variant specifically targets applications requiring a 4.74V threshold in the SOT-143-4 package.

Replacement Considerations

MAX6468US46D3+ is the non-tape-and-reel equivalent. MAX6468XS46D3+T offers SC-70-4 packaging with identical electrical characteristics. Cross-reference threshold tolerances and output drive capabilities when substituting.