ADM812MARTZ-REEL

Supervisors Overview

The ADM812MARTZ-REEL is a single-channel voltage supervisory circuit manufactured by Analog Devices Inc. It operates within a supply voltage range up to 5.5 V and features an active high output type with a manual reset function. The device monitors one input channel and provides a reset delay time of 560 ms. It has a threshold voltage of 4.38 V and an overvoltage threshold of 4.47 V. The component is housed in a SOT-143-4 package, suitable for surface mount installation. It functions without a watchdog timer or battery backup switch. The operating temperature range spans from -40 °C to +125 °C, with a typical quiescent current of 15 µA.

Supervisors Feature Summary

• Provides reliable voltage monitoring with manual reset capability for system protection
• Features active high output configuration for direct interface with digital logic
• Operates across an extended industrial temperature range for robust performance
• Utilizes low power consumption design suitable for battery-operated applications

Supervisors Applications

• Microprocessor reset circuits
• Portable equipment power management
• Industrial control systems
• Communication equipment supervision

Supervisors Procurement Notes

Verify the specific suffix and tape/reel packaging details against the official Analog Devices datasheet before procurement. Confirm that the 4.38 V threshold variant matches the design requirements. Check for obsolescence status as distribution channels may list discontinued stock. Ensure compatibility with the target PCB footprint for the SOT-143-4 package. Validate RoHS compliance documentation if required by regulatory standards.

Supervisors Selection Notes

Select this component when a fixed 4.38 V threshold is required for the monitored rail. Consider the manual reset feature if user intervention is needed to clear fault conditions. Evaluate the 560 ms reset delay against the target system's startup timing requirements. Compare the 15 µA quiescent current against other supervisors if ultra-low power is critical. Ensure the SOT-143-4 package fits within the available board space constraints.

Supervisors Part Context

The ADM812 series belongs to Analog Devices' line of voltage monitoring devices designed for general-purpose reset generation. These components are part of the broader ADM81x family, which offers various threshold voltages and package options. The ADM812 specifically integrates manual reset functionality, distinguishing it from simpler supervisor ICs. This series is widely used in embedded systems requiring stable power sequencing and fault detection.

Supervisors Replacement Considerations

Publicly confirmed substitute part numbers include APX812 variants. Verify pinout compatibility and electrical parameters such as threshold voltage and reset delay before substitution. Ensure the replacement supports the same SOT-143-4 package and manual reset feature if required.