XC6121A740MR-G

Supervisors Overview

The XC6121A740MR-G is a high-precision voltage detector manufactured by Torex Semiconductor, designed for monitoring power supply integrity in electronic systems. It operates within an input voltage range of 1.6 V to 5.0 V and features a fixed detection threshold of 4.0 V. The device incorporates a built-in watchdog timer with selectable timeout periods ranging from 50 ms to 1.6 s, ensuring system reliability through active monitoring. It utilizes CMOS process technology to achieve low current consumption, with a typical operating current of 1.8 µA. The output driver provides an N-channel open-drain signal that goes low upon detecting a voltage drop below the threshold.

Supervisors Feature Summary

• Integrates a watchdog function with selectable timeout periods to detect system malfunctions
• Features a built-in delay circuit that eliminates the need for external timing components
• Includes an enable pin (EN/ENB) allowing independent control over the watchdog function while maintaining voltage detection
• Utilizes laser trimming technology to ensure high accuracy of the internal detection voltage

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific suffix 'MR-G' corresponds to the SOT-25-5 package and reel packaging configuration as documented in the official datasheet. Confirm that the 'A' series designation aligns with the required detection voltage tolerance and temperature characteristics for your application environment. Ensure compatibility with the 1.6 V to 5.0 V operating range before integration into the target power supply design.

Supervisors Selection Notes

Select this component when a fixed 4.0 V threshold is required for single-input voltage monitoring. The integrated watchdog functionality makes it suitable for designs needing both power supervision and processor reset protection without additional discrete components. Consider the low quiescent current for battery-operated devices where power efficiency is critical. Verify that the open-drain output interface matches the logic levels of the connected microcontroller or system bus.

Supervisors Part Context

This part belongs to the XC6121/XC6122/XC6123/XC6124 series of voltage detectors from Torex Semiconductor. These ICs are characterized by high precision and low current consumption, utilizing CMOS technology. The series offers various detection voltages and output configurations, with the XC6121 variant specifically featuring an N-channel open-drain output and an enable pin for watchdog control.

Supervisors Replacement Considerations

Cross-reference with other parts in the XC6121 series that share the same 4.0 V detection threshold and SOT-25 package. Verify that any substitute maintains the same watchdog timeout options and enable pin functionality to ensure circuit compatibility.