XC6121F646ER-G

Supervisors Overview

The XC6121F646ER-G is a high-precision voltage detector with an integrated watchdog timer manufactured by Torex Semiconductor. It operates within a supply voltage range of 1.0V to 6.0V and features a fixed detection threshold of 4.6V. The device utilizes CMOS process technology for low current consumption, with a typical operating current of 5µA. It includes a built-in delay circuit that eliminates the need for external components for release delay timing. The output configuration is an N-channel open-drain type, providing active-low reset signals upon power failure or watchdog timeout.

Supervisors Feature Summary

• Integrates voltage detection and watchdog timer functions in a single chip
• Utilizes laser trimming technology for high-precision fixed detection thresholds
• Includes internal delay circuits for release delay and watchdog timeout without external components
• Features EN/ENB pin control to selectively disable the watchdog function while maintaining voltage monitoring

Supervisors Applications

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

Supervisors Procurement Notes

Verify the specific suffix ER-G corresponds to the USP-6 package and tape & reel packaging format as documented in official distributor listings. Confirm the detection threshold matches the required system voltage level of 4.6V. Ensure compatibility with the target operating temperature range of -40°C to +85°C. Cross-reference the datasheet revision date to ensure the latest electrical characteristics are applied.

Supervisors Selection Notes

Select this component when a combined voltage supervisor and watchdog timer is required for space-constrained designs. The fixed 4.6V threshold suits applications where the main supply rail requires monitoring at this specific level. The open-drain output allows for flexible interfacing with various logic families. Consider the low quiescent current for battery-powered systems requiring extended operational life.

Supervisors Part Context

This part belongs to the XC6121 series, which groups high-precision voltage detectors with watchdog functions. The series differentiates parts primarily by their fixed detection voltage thresholds, which are internally set via laser trimming. The XC6121 variant specifically denotes the inclusion of the watchdog timer functionality alongside the voltage detection circuit, distinguishing it from basic voltage detectors.

Supervisors Replacement Considerations

Other XC6121 series variants with different detection thresholds (e.g., XC6121C530ER-G) may be considered if the system voltage requirements differ. Substitution requires verifying that the new threshold voltage aligns with the monitored rail and that the package footprint remains compatible.