ADM8321WCY46ARJZR7

Supervisors Overview

The ADM8321WCY46ARJZR7 is a voltage supervisory circuit manufactured by Analog Devices Inc., designed for monitoring single-channel power supplies. It operates within a supply voltage range up to 5.5 V and features a fixed reset threshold of 4.63 V. The device provides an active high, push-pull output and includes a manual reset input for system control. It supports a watchdog timer with a typical timeout of 1.6 s and offers a reset delay time of 200 ms. The component is rated for operation in temperatures ranging from -40°C to +125°C and is housed in a compact SOT-23-5 surface-mount package.

Supervisors Feature Summary

• Integrates a windowed watchdog timer with manual reset capability for enhanced system reliability
• Provides active high push-pull output stage for direct logic interface compatibility
• Operates across the full industrial temperature range of -40°C to +125°C

Supervisors Applications

• Monitoring microprocessor and microcontroller power rails
• Supervising battery-powered systems requiring low quiescent current
• Industrial control units operating in harsh thermal environments

Supervisors Procurement Notes

Verify the specific suffix ARJZR7 corresponds to the tape-and-reel packaging configuration required for automated assembly processes. Confirm that the W grade indicates the extended industrial temperature range suitable for your operational environment. Ensure the C code matches the 4.63 V threshold requirement for your target voltage rail. Cross-reference the manufacturer's latest datasheet to confirm pinout compatibility with existing PCB footprints before finalizing procurement orders.

Supervisors Selection Notes

Select this component when an active high output signal is required to drive subsequent logic stages without inversion. The integrated windowed watchdog function simplifies firmware design by providing hardware-based fault detection. Consider the 200 ms reset delay to ensure stable power-up sequencing for sensitive digital loads. The SOT-23-5 package offers a small footprint ideal for space-constrained portable or dense industrial designs.

Supervisors Part Context

This part belongs to the ADM8321 series of supervisory circuits from Analog Devices. The series is characterized by its combination of voltage monitoring and watchdog timer functions in a minimal five-pin package. Variants within the family differ primarily in reset threshold voltages and output polarities, allowing designers to tailor supervision parameters to specific application needs without changing the physical form factor.

Supervisors Replacement Considerations

ADM8321WAX30ARJZR7: Features a lower 3.0 V threshold; verify compatibility with target supply voltage.

Supervisors FAQ

What is the function of the manual reset input?

The manual reset input allows external circuitry or user actions to force the supervisor into a reset state independently of the voltage threshold or watchdog timer conditions.

How does the windowed watchdog timer operate?

The windowed watchdog requires periodic triggering within a specified time window; failure to trigger results in a reset assertion to prevent software lockups.