MAX6340UK28-T

Overview

The MAX6340UK28-T is a low-power microprocessor supervisor circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors system voltages ranging from 1.6V to 5V and asserts a reset signal when the supply voltage falls below its factory-set threshold of 2.8V. The device features an active-low, open-drain reset output and operates within a temperature range of -40°C to +125°C. It consumes only 3µA of quiescent current at 1.8V and is housed in a compact 5-pin SOT-23 package.

Feature Summary

• Monitors system voltages from 1.6V to 5V with a fixed 2.8V reset threshold
• Provides active-low, open-drain reset output for reliable logic interfacing
• Ensures reset validity down to 1V supply level
• Operates with ultra-low quiescent current consumption

Applications

• Portable electronic devices requiring power supervision
• Battery-operated systems needing low standby current
• Microprocessor reset circuits in embedded controllers
• Industrial control units operating in extended temperature ranges

Procurement Notes

Verify the exact suffix against official documentation, as 'T' typically indicates tape-and-reel packaging while '+ denotes lead-free compliance. Confirm availability status directly with authorized distributors, as supply constraints may apply. Ensure the ordering part number matches the specific threshold voltage and package variant required for your design to avoid functional mismatches.

Selection Notes

Select this component when a fixed 2.8V threshold is appropriate for the target supply rail. Consider the open-drain output configuration if external pull-up resistors are acceptable or required by the system logic levels. Evaluate the 3µA quiescent current against total system power budgets, particularly for battery-powered applications where standby consumption is critical.

Part Context

This device belongs to the MAX63xx series of microprocessor supervisory circuits designed for low-power applications. It complements other variants in the family that offer adjustable timeouts or different output configurations. The MAX6340 provides a simple, cost-effective solution for basic power monitoring without the complexity of capacitor-adjustable delay circuits found in related models.

Replacement Considerations

The MAX6340 is pin-compatible with the LP3470. Designers should verify electrical specifications such as quiescent current and reset accuracy when substituting with other fixed-threshold supervisors from the same manufacturer or competitors.