MAX6353UVUK

Overview

The MAX6353UVUK+T is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors two independent supply voltages with factory-set thresholds of 1.67V and 2.78V, providing corresponding overvoltage detection at 1.7V and 2.82V. The device features an active-low push-pull reset output referenced to VCC1, a debounced manual reset input, and a fixed 180ms reset delay time. Operating from a maximum supply voltage of 5.5V with a typical quiescent current of 20µA, it ensures system reliability within an accuracy of 1.5%. The component is housed in a compact SOT-23-5 package and supports operation across an extended temperature range of -40°C to +85°C.

Feature Summary

• Dual-channel voltage monitoring with precise factory-set thresholds for multiple power rails
• Active-low push-pull reset output referenced to the primary supply rail
• Debounced manual reset input compatible with TTL/CMOS logic levels

Applications

• Embedded systems requiring simultaneous supervision of low-voltage digital cores
• Portable electronics utilizing multiple battery or regulator sources
• Industrial control units needing reliable power-fail detection

Procurement Notes

Verify the complete part number including suffixes such as +T for reel packaging when ordering. Confirm that the specific threshold voltages (1.67V/2.78V) match the design requirements, as other variants exist within the MAX6353 family. Check current availability status as distribution may be limited or discontinued depending on the region and distributor.

Selection Notes

Select this variant specifically for applications requiring 1.67V and 2.78V monitoring thresholds. Ensure the system operates within the 5.5V maximum supply limit and requires only a single reset output referenced to VCC1. Consider the SOT-23-5 package size constraints and the 20µA standby current suitability for battery-powered designs.

Part Context

This component belongs to the MAX6353L series of dual/triple-voltage microprocessor supervisors. It shares functional similarities with other devices in the MAX635x family but differs in specific threshold settings and pin configurations. The series is designed to replace discrete components, improving system accuracy and reducing board space.

FAQ

Is there a watchdog timer in the MAX6353UVUK?

No, the MAX6353UVUK does not include a watchdog timer function. Only specific variants like the MAX6358/MAX6359/MAX6360 offer this feature.

What is the reference voltage for the reset output?

The reset output is active-low and push-pull, referenced to VCC1.