XC6121A731ER-G

Supervisors Overview

The XC6121A731ER-G is a high-precision voltage detector with a watchdog function and ON/OFF control, manufactured by Torex Semiconductor Ltd using CMOS process technology. It operates within an input voltage range of 1.6V to 5.0V and features a fixed detection threshold of 3.1V. The device includes a built-in delay circuit for release delay times ranging from 3.13ms to 400ms and offers six selectable watchdog timeout periods between 50ms and 1.6s. It provides an active-low open-drain output and supports temperature characteristics of +100ppm/°C. The component is housed in a compact 6-USP (1.8x2) package.

Supervisors Feature Summary

• Integrates a watchdog timer with selectable timeout periods and an independent voltage detection circuit.
• Features an EN/ENB pin that allows the watchdog function to be disabled while maintaining voltage monitoring operation.
• Utilizes laser trimming technology to ensure high precision and stability of the fixed detection threshold voltage.

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 ER-G against official Torex documentation to confirm compliance with RoHS standards and halogen-free requirements. Ensure the ordering code matches the required detection threshold and package type. Cross-reference the datasheet revision date to validate current manufacturing status and availability constraints before finalizing procurement orders.

Supervisors Selection Notes

Select this component when a single-channel supervisor with integrated watchdog functionality is required. The fixed 3.1V threshold suits applications monitoring standard logic or memory supply rails. Consider the available watchdog timeout options if system recovery timing varies. Verify that the operating temperature range meets the environmental conditions of the target application.

Supervisors Part Context

This part belongs to the XC6121 series, which groups high-precision voltage detectors with watchdog functions. The series shares common architectural features such as low current consumption and internal delay circuits. Variations within the series are primarily defined by the detection threshold voltage and the specific watchdog timeout settings configured during manufacturing.

Supervisors Replacement Considerations

XC6121A231ER-G

Supervisors FAQ

How does the EN/ENB pin affect the watchdog function?

Setting the EN/ENB pin to a low or high level can turn off the watchdog function while allowing the voltage detector to remain operational.

What is the output configuration of the XC6121A731ER-G?

The device features an N-channel open-drain output that goes low when the detected voltage falls below the threshold.