MAX6346XR35

Overview

The MAX6346XR35 is a microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors power-supply voltages and asserts a reset signal when the supply falls below a factory-set threshold of 3.5V. The device features an active-low, push-pull reset output with a typical reset timeout delay of 200ms. It operates within a supply voltage range up to 5.5V and consumes ultra-low quiescent current. The component is available in a compact SOT-23-3 surface-mount package and supports an industrial operating temperature range from -40°C to +85°C.

Feature Summary

• Monitors single power-supply voltage against a fixed 3.5V threshold
• Provides active-low, push-pull reset output for reliable logic interfacing
• Ensures stable system startup with a defined reset timeout period
• Operates with ultra-low supply current for power-sensitive applications

Applications

• Microprocessor power supply supervision
• Battery-powered portable devices
• Industrial control systems requiring voltage monitoring
• Consumer electronics with strict power management needs

Procurement Notes

Verify the exact suffix (e.g., XR35 vs UR35) against the manufacturer's official datasheet to confirm the specific threshold voltage and package type. Ensure compatibility with your PCB footprint, as SOT-23 variants may have slight pinout differences. Confirm RoHS compliance status if required for your manufacturing process. Check for obsolescence notices or lifecycle status directly from Analog Devices before finalizing procurement plans.

Selection Notes

Select this component when a fixed 3.5V threshold is required for system supervision. Compare the 200ms timeout against your processor's startup requirements. Consider the SOT-23-3 package size constraints versus alternative packages like SC70 if space is limited. Evaluate the low quiescent current benefit against other supervisors in the MAX6346 family that may offer different thresholds or manual reset capabilities.

Part Context

The MAX6346 series belongs to Maxim Integrated's line of ultra-low-power microprocessor reset circuits. These devices are designed to monitor voltage rails in embedded systems. The MAX6346XR35 specifically targets applications needing a 3.5V supervision point. It shares functional similarities with other parts in the MAX6346 and MAX6381 families but differs in threshold settings and package options.

Replacement Considerations

Direct substitutes include other MAX6346 variants with similar thresholds, such as MAX6346UR35. Cross-reference with the MAX6381 series for comparable functionality in different packages. Verify electrical parameters and pinouts before substitution.