MAX6354LTUK+

Overview

The MAX6354LTUK+T is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors two independent supply rails with preset thresholds of 3.08V and 4.63V, asserting an active-low push-pull reset output referenced to VCC2 when voltages drop below these levels. The device operates within a supply range up to 5.5V, consumes 20µA, and features a 180ms reset delay with 1.5% accuracy. It includes a debounced manual reset input and functions in SOT-23-5 packages across -40°C to +85°C.

Feature Summary

• Monitors two independent voltage inputs with factory-set precision thresholds
• Asserts active-low push-pull reset output referenced to the secondary supply rail
• Includes a debounced manual reset input compatible with TTL/CMOS logic
• Maintains valid reset states as long as either monitored supply exceeds 1.0V

Applications

• Dual-rail power supply monitoring in embedded systems
• Voltage supervision for portable battery-powered equipment
• System reliability enhancement in intelligent instruments
• Microprocessor reset generation in multivoltage controller architectures

Procurement Notes

Verify exact suffix compatibility during sourcing, as variations such as LTUK+T indicate specific tape-and-reel packaging configurations. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Cross-reference datasheet revision dates to ensure parameter consistency. Validate package marking codes against physical samples to prevent counterfeit substitution. Check current availability status directly with authorized distributors due to potential supply constraints.

Selection Notes

Select this component when precise monitoring of two distinct voltage rails is required without external resistors. The fixed threshold values eliminate resistor tolerance errors but limit flexibility compared to programmable supervisors. Ensure the reset reference to VCC2 aligns with system architecture requirements. Verify that the 180ms delay meets startup timing constraints. Consider the low quiescent current for battery-operated designs where power efficiency is critical.

Part Context

This part belongs to the MAX6351–MAX6360 family of dual/triple-voltage supervisory circuits designed to replace discrete monitoring components. These devices improve system accuracy by integrating multiple reset channels into a single small-footprint package. The series supports various threshold combinations and offers options for watchdog timers or additional voltage monitoring depending on the specific model variant selected.

Replacement Considerations

Direct substitutes include other MAX635x variants with matching pinouts and similar threshold specifications. Verify functional equivalence regarding reset reference polarity and output drive capability before substitution.