ADM812SARTZ-REEL7

Supervisors Overview

The ADM812SARTZ-REEL7 is a voltage supervisory circuit manufactured by Analog Devices Inc., designed for monitoring single power supply rails. It operates within a maximum supply voltage of 5.5 V and features a manual reset capability with a fixed reset delay time of 560 ms. The device utilizes a push-pull output configuration and is housed in an SOT-143-4 surface-mount package. It supports multiple threshold voltages including 2.5 V, 3 V, 3.3 V, and 5 V, with a specific overvoltage threshold of 2.98 V noted in available specifications. The component draws a working supply current of 15 uA and dissipates up to 200 mW of power. It functions reliably across a temperature range from -40 C to +85 C.

Supervisors Feature Summary

• Provides voltage supervision for single-input applications with manual reset functionality
• Features a push-pull output type for direct interface with digital logic
• Operates with low quiescent current suitable for power-sensitive designs

Supervisors Applications

• Microprocessor reset generation circuits
• Battery-powered system voltage monitoring
• Portable electronic device power management

Supervisors Procurement Notes

Verify the exact threshold voltage variant required, as the series supports multiple options such as 2.5 V, 3 V, 3.3 V, and 5 V. Confirm that the SOT-143-4 package aligns with PCB footprint constraints. Ensure the manual reset feature meets system requirements, as no automatic watchdog timer is included. Check availability status as distribution channels may indicate limited stock or discontinuation phases.

Supervisors Selection Notes

Select this component when a simple, low-power supervisor for a single rail is needed without complex timing features. The absence of a watchdog timer simplifies design but requires external handling if fault recovery is critical. Consider the 560 ms delay duration against processor startup times. Verify that the 15 uA current consumption fits the standby power budget of the application.

Supervisors Part Context

This part belongs to the ADM812 series of supervisory circuits from Analog Devices. It shares the same core architecture and package style with variants like the ADM812LARTZ and ADM812TARTZ, differing primarily in threshold voltage settings. The series is characterized by its compact SOT-143-4 form factor and basic reset generation capabilities.

Supervisors Replacement Considerations

Direct substitutes include other ADM812 variants with matching packages and similar electrical characteristics, such as the ADM812LARTZ-REEL7 or ADM812TARTZ-REEL7, provided the threshold voltage matches the design requirement.