MAX6351TWUT+

Overview

The MAX6351TWUT+ is a dual-channel microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors two independent power-supply voltages and asserts active-low reset outputs when inputs drop below preset thresholds. The device features push-pull outputs referenced to VCC1 and VCC2, a debounced manual reset input, and operates within an extended temperature range of -40°C to +85°C. It utilizes a 6-pin SOT-23 surface-mount package.

Feature Summary

• Dual-channel voltage monitoring with factory-set reset thresholds
• Active-low push-pull reset outputs referenced to respective supply rails
• Debounced manual reset input compatible with TTL/CMOS logic levels

Applications

• Embedded systems requiring multi-voltage supervision
• Microprocessor power-up sequencing circuits
• Industrial control units operating in extended temperature environments

Procurement Notes

Verify the specific suffix 'TW' against the manufacturer's current part numbering system to confirm threshold voltage accuracy. Confirm RoHS compliance status for the specific manufacturing lot. Check for obsolescence notices or product change notifications prior to finalizing procurement plans.

Selection Notes

Select this component when simultaneous monitoring of two distinct voltage rails is required. Ensure the fixed threshold voltages match the target supply rails. Verify that the push-pull output drive capability meets the downstream load requirements compared to open-drain alternatives.

Part Context

This part belongs to the MAX6351-MAX6360 series of µP supervisors designed to replace discrete monitoring components. The series improves system reliability through precision factory-set thresholds and integrated watchdog timers in select variants. The MAX6351 specifically provides dual-channel supervision without additional voltage monitor inputs found in triple-channel models.

FAQ

What is the reference voltage for the reset outputs?

The MAX6351 provides two active-low push-pull reset outputs; one is referenced to VCC1 and the other is referenced to VCC2.

Does the MAX6351 include a watchdog timer?

No, the MAX6351 does not include a watchdog timer. Watchdog functionality is available in other members of the series such as the MAX6358, MAX6359, and MAX6360.