MAX6468US26D3-T

Overview

The MAX6468US26D3-T is a microprocessor supervisory reset circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors a single power-supply voltage with a fixed threshold of 2.6V and asserts an active-low, push-pull reset signal if the supply drops below this level. The device features an edge-triggered, one-shot manual reset function that ensures the processor enters reset mode for a fixed timeout period. Key electrical parameters include a maximum supply voltage of 5.5V, a reset delay time of 225ms, and a quiescent current of 7µA. It operates within a temperature range of -40°C to +125°C and is housed in a SOT-143-4 package.

Feature Summary

• Edge-triggered, one-shot manual reset function prevents continuous reset assertion during held buttons
• Active-low, push-pull output driver provides robust reset signaling capability
• Factory-trimmed fixed threshold voltage eliminates need for external resistor dividers
• Low quiescent current consumption supports battery-powered system efficiency

Applications

• Microprocessor (MPU) supervisory reset circuits
• Battery-operated electronic devices requiring low standby current
• Portable consumer electronics systems
• Industrial control systems operating in extended temperature ranges

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) against specific project requirements. Check current lifecycle status as availability may be limited or subject to last-time buy notices. Ensure packaging type matches handling capabilities.

Selection Notes

Select this part when a fixed 2.6V threshold is required for single-supply monitoring. Compare reset timeout options (150ms vs 1200ms variants) against processor startup requirements. Consider package constraints (SOT-143-4) for PCB layout. Evaluate thermal performance within the -40°C to +125°C operating range for environmental suitability.

Part Context

The MAX6468 belongs to Maxim's family of microprocessor supervisory circuits designed to enhance system reliability. These devices monitor power supplies and generate reset signals to protect sensitive logic components from improper operation during brown-out conditions or power-up sequences.

Replacement Considerations

Cross-reference with other MAX6468 variants (e.g., MAX6468US29D3-T) if different threshold voltages are needed. Verify pinout compatibility with existing designs before substituting. Check for updated lifecycle status as older tape-and-reel versions (-T suffix) may have different availability than leaded (+) versions.