XC6121E736MR-G

Supervisors Overview

The XC6121E736MR-G is a high-precision voltage detector with watchdog function manufactured by Torex Semiconductor. It operates within an input voltage range of 1 V to 6 V and features a fixed detection threshold of 3.6 V. The device incorporates a built-in delay circuit, eliminating the need for external components for release delay time settings. It utilizes CMOS process technology to achieve low current consumption, with a typical operating supply current of 12 uA and static current of 5 uA. The output driver is configured as an open drain type, providing an active-low reset signal when the monitored voltage falls below the threshold.

Supervisors Feature Summary

• Integrates a watchdog timer function with selectable timeout periods ranging from 50 ms to 1.6 s.
• Features an EN/ENB pin that allows independent control over the watchdog function while keeping the voltage detector operational.
• Utilizes laser trimming technology to ensure high accuracy in internally fixed detect voltages across the series range.
• Provides a built-in delay circuit for release delay times without requiring external capacitors or resistors.

Supervisors Applications

• Microprocessor watchdog monitoring and reset circuits
• Memory battery backup circuits
• System power-on reset circuits
• Power failure detection systems

Supervisors Procurement Notes

Verify the specific suffix MR-G corresponds to the SOT-25-5 package and tape & reel packaging configuration. Confirm the detection voltage code E736 aligns with the required 3.6 V threshold for the application. Ensure compatibility with the specified operating temperature range of -40°C to +85°C. Cross-reference the datasheet revision to confirm pinout and electrical characteristics match the design requirements.

Supervisors Selection Notes

Select this component when a fixed 3.6 V threshold is required for single-channel voltage monitoring. Consider the open-drain output capability for interfacing with various logic levels. Evaluate the low quiescent current specifications for battery-powered applications. Verify that the integrated watchdog timeout options meet the system's fault recovery timing constraints.

Supervisors Part Context

This part belongs to the XC6121/XC6122/XC6123/XC6124 series of voltage detectors. The series offers high precision and low current consumption using CMOS technology. Variations in the series differ primarily by detection voltage codes and output configurations, all sharing the core architecture of a reference source, comparator, and delay circuit within a compact surface-mount package.

Supervisors Replacement Considerations

Substitutes within the XC6121 series with different detection voltage codes may be considered if the threshold requirement changes. Other Torex supervisor ICs with similar packages and open-drain outputs can serve as alternatives, provided the electrical parameters and watchdog functionality are compatible.