MAX6357SYUT+

Overview

The MAX6357SYUT+ is a dual/triple-voltage microprocessor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within an extended temperature range of -40°C to +85°C and features a supply current of 20µA. The device monitors multiple power supplies with precision factory-set thresholds, including options for 1.8V, 2.5V, 3.0V, 3.3V, and 5V inputs. It provides active-low push-pull reset outputs referenced to VCC1 or VCC2, ensuring system reliability. The component includes a debounced manual reset input and offers watchdog timer functionality with specified startup and normal timeout periods.

Feature Summary

• Precision monitoring of multiple power-supply voltages with factory-set thresholds
• Active-low push-pull reset outputs referenced to specific supply rails
• Debounced TTL/CMOS-compatible manual-reset input for system control
• Watchdog timer with defined startup and normal timeout periods

Applications

• Microprocessor supervisory circuits requiring multiple voltage monitoring
• Systems needing precise power-on reset pulse width generation
• Applications utilizing watchdog timer functionality for fault detection

Procurement Notes

Verify the exact suffix configuration against the manufacturer's official documentation to ensure correct threshold levels and package type. Confirm availability status as distribution channels may vary. Cross-reference the datasheet revision date to ensure compatibility with current design requirements. Check for any specific ordering restrictions or regional availability limitations before finalizing procurement plans.

Selection Notes

Select this component when designing systems that require simultaneous monitoring of two or three distinct voltage rails. Consider the specific reset output reference (VCC1 or VCC2) required by the target microprocessor architecture. Evaluate the need for watchdog timer capabilities versus simpler supervision needs. Ensure the operating temperature range meets the environmental specifications of the intended application environment.

Part Context

This part belongs to the MAX6351–MAX6360 series of microprocessor supervisory circuits. These devices are designed to improve system reliability compared to discrete components. The series offers various combinations of dual and triple voltage monitoring with different reset output configurations. They are available in compact SOT-23 packages suitable for space-constrained designs.

Replacement Considerations

Consider the MAX6356 or MAX6359 from the same series for alternative threshold configurations or output references. Verify pinout compatibility and electrical characteristics before substitution. Consult the manufacturer's cross-reference guide for officially confirmed substitutes.