MAX6346XR33-T

Overview

The MAX6346XR33-T is a single-channel microprocessor supervisor circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of +1.8V to +5.0V and consumes only 3µA of supply current at +1.8V. The device features a fixed reset threshold voltage of 3.3V, ensuring reliable monitoring of power-supply voltages. It provides a push-pull, active-low reset output that asserts when the supply voltage falls below the threshold. The minimum reset timeout delay is 100ms, which remains asserted for this duration after the supply rises above the threshold. The component is housed in a compact SC-70-3 surface-mount package.

Feature Summary

• Monitors power-supply voltages from +1.8V to +5.0V with ultra-low power consumption
• Provides a push-pull, active-low reset output for reliable system control
• Features a fixed 3.3V reset threshold voltage for specific application requirements
• Ensures adequate reset pulse width with a minimum 100ms timeout delay

Applications

• Portable battery-powered equipment requiring low standby current
• Microprocessor systems needing precise power supervision
• Consumer electronics with limited board space constraints

Procurement Notes

Verify part status as obsolete before procurement planning. Confirm compatibility with existing design specifications since replacement components may require schematic adjustments. Check for lead-free compliance if required by regional regulations. Ensure supply chain stability due to discontinuation status. Validate pinout compatibility if substituting with similar packages.

Selection Notes

Select this component when a fixed 3.3V reset threshold is required for voltage monitoring applications. Consider the ultra-low 3µA supply current for battery-operated devices where power efficiency is critical. The SC-70-3 package suits designs with strict space limitations. Verify that the 100ms minimum timeout meets system startup requirements. Evaluate the push-pull output capability against load requirements.

Part Context

The MAX6346 series belongs to Maxim Integrated's family of low-voltage, low-power microprocessor reset circuits. These supervisory ICs are designed to monitor power supplies and generate reset signals for digital systems. The XR suffix indicates the SC-70 package variant, while the 33 denotes the fixed 3.3V threshold voltage. This series offers various timeout delays and threshold options to suit different application needs.

Replacement Considerations

Public confirmed substitute part numbers: None identified in available documentation.