XC6121D421MR-G

Supervisors Overview

The XC6121D421MR-G is a high-precision voltage detector with a watchdog function manufactured by Torex Semiconductor. It utilizes CMOS process technology and operates within an input voltage range of 1.6V to 5.0V. The device features a fixed output threshold of 2.1V and provides an active-low reset signal with a typical release delay time of 200ms. It supports ON/OFF control via the EN/ENB pin, allowing independent management of the watchdog function while maintaining voltage detection. The component is housed in a compact SOT-25-5 package and is rated for operation between -40°C and +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer with a voltage detector in a single CMOS chip
• Features an active-low open-drain or open-collector output driver
• Includes a built-in delay circuit eliminating the need for external components
• Allows independent control of the watchdog function via the EN/ENB pin

Supervisors Applications

• Microprocessor system supervision
• Embedded controller reset circuits
• Battery-powered device monitoring
• Industrial control system protection

Supervisors Procurement Notes

Verify the specific suffix 'D' against the manufacturer's official datasheet to confirm the exact threshold voltage and package variant, as suffixes define functional parameters. Ensure the EN/ENB pin configuration matches the application logic requirements. Confirm RoHS compliance status through the latest production documentation before finalizing procurement specifications.

Supervisors Selection Notes

Select this component when a combined voltage supervision and system reset capability is required in a minimal footprint. The low current consumption makes it suitable for battery-operated applications. Verify that the 2.1V threshold aligns with the monitored rail voltage. Consider the 200ms delay requirement to ensure it meets the system startup timing constraints without causing false resets during normal power-up sequences.

Supervisors Part Context

This part belongs to the XC6121/XC6122/XC6123/XC6124 series of voltage detectors with watchdog functions. These devices are designed for high-precision monitoring in portable and industrial electronics. The series leverages advanced CMOS technology to achieve low power consumption while maintaining accurate threshold detection and reliable reset generation for sensitive digital loads.

Supervisors Replacement Considerations

Cross-reference other parts within the XC6121 series for alternative thresholds or package options. Verify compatibility with existing PCB footprints if substituting with similar watchdog timers from other manufacturers. Ensure the replacement maintains the same active-low output polarity and delay characteristics to preserve system stability.