ADM705ARZ-REEL7

Supervisors Overview

The ADM705ARZ-REEL7 is a microprocessor supervisory circuit manufactured by Analog Devices Inc., designed to ensure system stability in voltage-sensitive applications. It operates within a supply voltage range of up to 5.5 V and features a precise threshold voltage of 4.65 V for power monitoring. The device incorporates a built-in watchdog timer with a timeout period of 1.60 seconds to prevent software lockups, alongside a manual reset input. It delivers a fixed reset pulse width of 200 ms upon power failure detection. Operating from -40°C to +85°C, it consumes a typical quiescent current of 190 µA. The component is housed in an SOIC-8 surface-mount package and provides push-pull output capabilities.

Supervisors Feature Summary

• Integrated watchdog timer functionality prevents system lockups caused by software errors or abnormal processor behavior.
• Provides precise power-fail detection with a defined threshold voltage to trigger safe system resets during voltage drops.
• Includes a debounced manual reset input allowing external forced system resets independent of power conditions.
• Generates a consistent reset pulse duration to ensure adequate time for microprocessor initialization sequences.

Supervisors Applications

• Microprocessor systems requiring reliable power supervision
• Industrial controllers needing watchdog protection against software faults
• Smart instruments demanding stable voltage monitoring
• Computer hardware systems with critical reset requirements

Supervisors Procurement Notes

Verify the specific suffix REEL7 confirms tape-and-reel packaging compatibility with automated assembly equipment. Confirm RoHS compliance status through official documentation as environmental regulations vary by region. Check for obsolescence notices since this part may be subject to discontinuation. Ensure the SOIC-8 footprint matches your PCB design constraints. Validate that the 4.65 V threshold aligns with your target supply voltage specifications before finalizing procurement.

Supervisors Selection Notes

Select this component when both power monitoring and watchdog timer functions are required in a single IC. Compare the 4.65 V threshold against alternative models like the ADM706 if a lower voltage trip point is needed. Consider the 190 µA quiescent current for battery-operated designs where power efficiency is critical. Verify that the SOIC-8 package fits within your available board space compared to other package options in the series.

Supervisors Part Context

This device belongs to the ADM705/ADM706/ADM707/ADM708 family of microprocessor supervisory circuits from Analog Devices. These components serve as essential power management elements, replacing older discrete solutions with integrated monitoring and reset generation. The ADM705 variant specifically distinguishes itself by including a watchdog timer, unlike the ADM707 which lacks this feature but offers active-high outputs. This family targets industrial and commercial applications requiring robust system reliability.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Users should consult official Analog Devices documentation for current lifecycle status and potential end-of-life alternatives.