MAX6353LSUK+T

Overview

The MAX6353LSUK+T is a dual-voltage supervisory circuit from the Maxim Integrated MAX635x series, designed to monitor two independent power supplies. It operates within an extended temperature range of -40°C to +85°C and is housed in a compact SOT-23-5 surface-mount package. The device features precision factory-set reset thresholds of 2.32V and 2.93V for its respective inputs. It provides active-low, push-pull reset outputs referenced to VCC1, ensuring system reliability by asserting resets when input voltages drop below their associated preset thresholds. The circuit includes a debounced manual reset input and maintains output validity as long as either supply remains above 1.0V.

Feature Summary

• Dual-channel voltage monitoring with precision factory-set thresholds
• Active-low push-pull reset outputs referenced to VCC1
• Debounced TTL/CMOS-compatible manual reset input
• Extended operating temperature range for industrial applications

Applications

• Multi-rail embedded systems requiring simultaneous power supervision
• Industrial control units with multiple voltage domains
• Communication equipment needing reliable power-on reset sequencing

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm the specific suffix 'LS' indicates the correct threshold combination (2.32V/2.93V) for your design requirements. Check current availability status as this part may be subject to limited supply or obsolescence notices. Ensure ESD handling protocols are followed during storage and installation due to the small SOT-23-5 form factor.

Selection Notes

Select this component when precise monitoring of two distinct voltage rails is required without external resistors. The fixed thresholds eliminate calibration needs compared to adjustable supervisors. Consider the SOT-23-5 footprint constraints and the need for active-low logic compatibility. Verify that the 180ms reset delay meets your system's startup timing requirements. This part is suitable where space savings and high accuracy are prioritized over programmable thresholds.

Part Context

This device belongs to the MAX6351–MAX6360 family of microprocessor supervisors. These ICs improve system reliability by replacing discrete components with integrated solutions. The series offers various pin configurations and threshold options. The MAX6353 variant specifically provides dual monitoring with outputs referenced to the first supply rail, distinguishing it from triple-monitor or differently referenced counterparts in the same family.

Replacement Considerations

Direct substitutes include other MAX635x variants with compatible pinouts and similar threshold levels, such as MAX6353UVUK+T if different thresholds are acceptable. Cross-reference with ADI's official replacement guide for end-of-life notifications. Ensure any alternative maintains the SOT-23-5 package and active-low push-pull output characteristics.