DS1705EUA

Supervisors Overview

The DS1705EUA+ is a MicroMonitor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 1V to 5.5V and features a threshold voltage of 5V with 5% accuracy. The device provides power-fail detection, a watchdog timer, and an active-low push-pull output. It includes a reset delay time of 205ms and consumes 60uA of operating current. The component supports manual reset functionality and is housed in an UMAX-8 surface-mount package, suitable for industrial temperatures from -40°C to +85°C.

Supervisors Feature Summary

• Integrated watchdog timer for system reliability monitoring
• Power-fail detection capability for upstream voltage supervision
• Active-low push-pull output configuration
• Manual reset input support

Supervisors Applications

• Microprocessor system supervision
• Voltage monitoring for 3.3V and 5.0V logic systems
• Industrial control board reset circuits

Supervisors Procurement Notes

Verify the specific suffix 'EUA+' against official datasheets to confirm RoHS compliance and lead-free status. Confirm availability as the product lifecycle status may indicate obsolescence or limited stock. Ensure the manufacturer designation matches Analog Devices Inc. or Maxim Integrated to avoid counterfeit components. Cross-reference the ordering part number with authorized distributors for accurate sourcing information.

Supervisors Selection Notes

Select this component when a dedicated supervisory circuit with integrated watchdog functionality is required. The fixed 5V threshold makes it suitable for standard 5V logic applications. Consider the 60uA quiescent current for low-power designs. Verify that the UMAX-8 package fits the PCB layout constraints. Ensure the active-low output polarity matches the target microcontroller reset pin requirements.

Supervisors Part Context

The DS1705 belongs to the Maxim Integrated MicroMonitor family of supervisory circuits. These devices are designed to monitor voltage levels and provide reset signals to microprocessors. The series typically includes variants with different thresholds and features like watchdog timers. This specific model integrates both voltage monitoring and watchdog functions in a compact surface-mount package.

Supervisors Replacement Considerations

Direct replacement options include the DS1705EUA+ (lead-free version) if the original was non-compliant. Check for other MicroMonitor variants with similar thresholds and watchdog features. Verify pin compatibility and electrical specifications before substituting.