XC6121E436MR-G

Supervisors Overview

The XC6121E436MR-G is a high-precision voltage detector with an integrated watchdog timer manufactured by Torex Semiconductor. It operates within a supply voltage range of 1 V to 6 V and features a fixed detection threshold of 3.0 V. The device utilizes CMOS process technology and offers a typical reset delay time of 200 ms. It provides an open-drain output configuration and supports manual reset functionality. The component is designed for surface mounting in SOT-25-5 packages and functions reliably across an operating temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer function that monitors system activity and triggers a reset if the input signal fails to toggle within the specified timeout period.
• Includes an enable pin (EN/ENB) that allows independent control over the watchdog function, enabling the voltage detector to remain active while the watchdog is disabled.
• Utilizes laser trimming technology to ensure high accuracy in the fixed detection voltage threshold without requiring external adjustment components.

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 indicates the tape and reel packaging format when ordering. Confirm the detection voltage code E corresponds to the 3.0 V threshold required for the application design. Ensure the SOT-25-5 package dimensions match the target PCB footprint constraints. Check RoHS compliance status against current regulatory requirements for the destination market.

Supervisors Selection Notes

Select this component when a fixed 3.0 V threshold is required alongside integrated watchdog protection. The open-drain output requires an external pull-up resistor for proper logic level interfacing. Consider the 200 ms typical reset delay when designing timing-critical power sequencing. Verify that the 1 V minimum operating voltage aligns with the lowest expected supply rail during operation.

Supervisors Part Context

This part belongs to the XC6121 series, which combines voltage detection with watchdog capabilities. The series uses CMOS technology for low current consumption. Detection voltages are internally fixed using laser trimming. The EN/ENB pin allows selective disabling of the watchdog function while maintaining voltage monitoring. This integration reduces external component count compared to separate supervisor and watchdog ICs.

Supervisors Replacement Considerations

Cross-reference other XC6121 variants with different detection voltage codes if the threshold does not match. Verify package compatibility with SOT-25-5 equivalents from other manufacturers. Ensure replacement parts support the same manual reset feature and open-drain output configuration.