MAX6335US22D3+

Overview

The MAX6335US22D3+ is a microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors power supplies in 1.8V to 3.3V systems, asserting an active-high reset signal when the supply voltage drops below a preset threshold or upon manual reset assertion. The device features a debounced manual-reset input and maintains the correct state for VCC down to 0.7V. It operates within a temperature range of -40°C to +125°C and consumes only 3.3µA of supply current.

Feature Summary

• Provides active-high reset output with push-pull configuration
• Features a debounced manual-reset input for user-initiated control
• Guaranteed correct reset state down to 0.7V supply voltage
• Includes internal timer to ignore fast transients on the supply line

Applications

• Microprocessor (µP) system power supply monitoring
• Digital system voltage supervision
• Battery-powered devices requiring low quiescent current
• Embedded controllers needing manual reset capability

Procurement Notes

Verify the specific suffix D3 against official documentation to confirm the exact reset threshold voltage and tolerance. Confirm RoHS compliance status (+ suffix). Check current availability as Maxim products may have limited stock or obsolescence notices. Ensure the active-high output matches the target microprocessor requirements compared to open-drain alternatives.

Selection Notes

Select this component when an active-high reset signal is required for the host processor. Compare the 3.3µA supply current against other supervisors if battery life is critical. Verify that the 0.7V operating limit meets the lowest expected supply voltage during brown-out conditions. Consider the SOT-143 package size constraints relative to available board space.

Part Context

This part belongs to the MAX6335/MAX6336/MAX6337 family of ultra-low-voltage, low-power µP reset circuits. While the MAX6336 offers push-pull active-low output and the MAX6337 provides open-drain active-low output, the MAX6335 specifically delivers an active-high reset. All three share similar low-power characteristics and manual reset functionality.

Replacement Considerations

Direct functional substitutes include MAX6336US22D3+ (active-low) and MAX6337US22D3+ (open-drain active-low), provided the logic polarity difference is accommodated in the design. Other Maxim supervisors like the MAX6315 series offer different thresholds but require verification of output type and current consumption.