MAX6353RVUK+

Overview

The MAX6353RVUK+T is a dual-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors two independent power supplies with preset thresholds of 1.67V and 2.78V, asserting active-low push-pull reset outputs referenced to VCC1 when voltages drop below these levels. The device operates within a supply voltage range up to 5.5V and features a manual reset input. It consumes only 20µA of supply current and includes an 180ms reset delay time. The component is housed in a compact SOT-23-5 package and is rated for operation across an extended temperature range from -40°C to +85°C.

Feature Summary

• Dual-channel voltage monitoring with factory-set precision thresholds
• Active-low push-pull reset outputs referenced to VCC1
• Debounced manual reset input compatible with TTL/CMOS logic
• Ultra-low 20µA supply current consumption

Applications

• Portable electronic devices requiring multi-supply management
• Battery-powered systems with low standby current constraints
• Embedded controllers needing reliable power-on reset sequencing
• Industrial equipment operating in extended temperature environments

Procurement Notes

Verify the specific suffix 'R' against official datasheets to confirm threshold accuracy and tolerance specifications. Confirm availability status as distribution channels may list this part as limited or obsolete. Ensure the ordering code matches the required voltage thresholds exactly. Check RoHS compliance documentation for final assembly requirements. Validate package marking codes against manufacturer standards.

Selection Notes

Select this component when simultaneous monitoring of two distinct voltage rails is required without external comparator circuits. The fixed thresholds eliminate the need for resistor divider networks, reducing board space and design complexity. Consider the 20µA quiescent current for battery-operated applications where power efficiency is critical. Verify that the active-low output polarity aligns with the target microprocessor reset pin requirements.

Part Context

This part belongs to the MAX635x series of dual and triple voltage supervisory circuits designed to improve system reliability. These devices replace discrete components and separate ICs by integrating multiple reset functions into a single small package. The series supports various voltage thresholds and offers options for watchdog timers and manual resets, catering to diverse embedded control needs.

Replacement Considerations

Direct substitutes include other parts from the MAX635x family with matching voltage thresholds and package types. Verify compatibility regarding output drive capability and reset delay times before substitution. Cross-reference threshold tolerances to ensure they meet the application's specific margin requirements.