XC6121F639MR-G

Supervisors Overview

The XC6121F639MR-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 3.9 V. The device utilizes CMOS technology for low current consumption, with a typical operating current of 12 uA and static current of 5 uA. It provides an open-drain output configuration and includes a reset delay time of 1.6 seconds. The component is housed in a 6-USP (1.8x2 mm) surface-mount package and supports an extended industrial temperature range from -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer function with selectable timeout periods ranging from 50 ms to 1.6 s.
• Features a built-in delay circuit that eliminates the need for external components for release delay timing.
• Includes an enable pin (EN/ENB) to control the on/off state of the watchdog function while maintaining voltage detection.

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 'MR' indicates the correct tape-and-reel packaging format required for automated assembly processes. Confirm that the 3.9 V threshold aligns precisely with the target system's voltage supervision requirements. Ensure the 6-USP package dimensions are compatible with the designated PCB footprint and soldering profile constraints.

Supervisors Selection Notes

Select this component when a fixed 3.9 V supervision level is required alongside active watchdog protection. The open-drain output necessitates an external pull-up resistor for proper logic level interfacing. Consider the 1.6 s reset timeout if longer system stabilization times are needed compared to standard millisecond delays.

Supervisors Part Context

This part belongs to the XC6121 series, which groups high-precision voltage detectors incorporating laser-trimmed reference voltages. The series distinguishes itself through low current consumption profiles and flexible watchdog integration options across various package types.

Supervisors Replacement Considerations

Cross-reference other XC6121 variants with different threshold codes or package suffixes if the 3.9 V setting or 6-USP form factor does not match the design constraints.