XC6121A438MR-G

Supervisors Overview

The XC6121A438MR-G is a high-precision voltage detector with a watchdog function manufactured by Torex Semiconductor. It utilizes CMOS process technology and features an internally fixed detect threshold voltage of 3.8V, set via laser trimming. The device operates within a supply voltage range of 1.6V to 5.0V and includes a built-in delay circuit for release delay times ranging from 3.13ms to 400ms. Six watchdog timeout period settings are available, spanning from 50ms to 1.6s. The output driver provides a low signal when the detected voltage falls below the threshold. It is housed in a compact SOT-25-5 package.

Supervisors Feature Summary

• Integrates a watchdog timer with selectable timeout periods for system monitoring
• Features a built-in delay circuit eliminating the need for external components
• Includes EN/ENB pin control to disable the watchdog while maintaining voltage detection
• Utilizes laser trimming technology for precise internal threshold voltage setting

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific suffix MR-G against the manufacturer's official datasheet to confirm the exact threshold voltage and package configuration. Ensure compatibility with the target system's voltage levels and temperature requirements before procurement. Cross-reference the part number with authorized distributors to confirm current product status and availability.

Supervisors Selection Notes

Select this component when a fixed 3.8V threshold is required for voltage monitoring applications. Consider the integrated watchdog functionality if system reliability depends on detecting processor hangs or communication errors. Evaluate the available release delay and watchdog timeout options to match the specific timing constraints of the target application design.

Supervisors Part Context

This part belongs to the XC6121 series of voltage detectors, which are designed for high-precision power management. The series incorporates CMOS technology to achieve low current consumption. The XC6121A438MR-G specifically addresses applications requiring a fixed 3.8V detection level with additional watchdog capabilities for enhanced system stability.

Supervisors Replacement Considerations

Compatible substitutes within the XC6121 family include XC6121A437MR-G (3.7V) and XC6121A439MR-G (3.9V), provided the threshold voltage difference is acceptable for the application. Other series such as XC6122 or XC6123 may offer similar functions but require verification of pinout and electrical specifications.