MAX6468XS22D3

Overview

The MAX6468XS22D3+T 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 of 2.2V. The device features an edge-triggered, one-shot manual reset function that ensures the microprocessor enters reset mode for a fixed timeout period only. Key electrical parameters include a maximum supply voltage of 5.5V, a typical quiescent current of 7µA, and a reset delay time of 225ms. It operates within a temperature range of -40°C to +125°C and utilizes an SC-70-4L surface-mount package.

Feature Summary

• Edge-triggered, one-shot manual reset function prevents continuous reset assertion during held manual reset conditions
• Factory-trimmed threshold voltage eliminates need for external components in monitoring specific supply rails
• Active-low push-pull output provides robust drive capability for microprocessor reset lines

Applications

• Microprocessor (MPU) supervisory circuits requiring reliable power-on reset
• Battery-powered systems where low quiescent current is critical for extended operation
• Embedded controllers needing protection against brown-out conditions

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to potential counterfeit risks. Confirm RoHS compliance status (+ suffix indicates lead-free) and check for obsolescence notices as Maxim Integrated products may transition to Analog Devices lifecycle management. Ensure packaging specifications match design requirements, noting availability in tape-and-reel formats for automated assembly processes.

Selection Notes

Select this component when a fixed 2.2V threshold is required for monitoring 1.8V or 3.3V supplies with tight tolerance margins. Consider the SC-70-4L package size constraints and thermal dissipation limits (245mW) for PCB layout. Evaluate system requirements against alternative thresholds within the MAX6468 family if voltage levels differ significantly from 2.2V.

Part Context

Part of the MAX6467/MAX6468 series of microprocessor supervisory circuits designed to improve system reliability compared to traditional manual reset designs. The series offers various factory-set thresholds to monitor standard supply voltages including +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V without external trimming components.

Replacement Considerations

Direct substitutes include other MAX6468 variants with different threshold voltages such as MAX6468XS19D3+T (1.9V), MAX6468XS20D3+T (2.0V), MAX6468XS24D3+T (2.4V), MAX6468XS45D3+T (4.5V), and MAX6468XS46D3+T (4.6V), provided the application voltage matches the new threshold.