XC6121F740MR-G

Supervisors Overview

The XC6121F740MR-G is a high-precision voltage detector manufactured by Torex Semiconductor Ltd, designed for monitoring single-channel power supply voltages. It operates within a supply voltage range of 1 V to 6 V and features an N-channel open-drain output configuration that asserts low when the detected voltage falls below the threshold. The device incorporates a built-in delay circuit to prevent false triggering during power transitions, with a reset delay time of 400 ms. It includes a watchdog timer function controlled via an EN/ENB pin, which can be left open due to internal pull-up mechanisms in the XC6121 series. The IC utilizes laser trimming technology for accurate detection voltages and maintains low current consumption, making it suitable for battery-powered applications.

Supervisors Feature Summary

• Integrates a watchdog timer function with selectable timeout periods to monitor system integrity
• Features a built-in delay circuit that eliminates the need for external timing components
• Provides an N-channel open-drain output signal that activates upon voltage detection
• Includes an enable pin (EN/ENB) allowing independent control 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-G corresponds to the SOT-25-5 package and standard operating temperature range when sourcing. Confirm the presence of the watchdog function and the 400 ms reset delay time against the official datasheet for this exact part number. Ensure compatibility with the target supply voltage range of 1 V to 6 V. Check RoHS compliance status as indicated in the manufacturer's documentation prior to integration into final assemblies.

Supervisors Selection Notes

Select this component when a single-channel voltage supervisor with integrated watchdog capabilities is required. The XC6121 series is appropriate for designs needing precise laser-trimmed detection thresholds without external resistors. Consider the open-drain output for interfacing with various logic levels. The availability of an enable pin allows for flexible power management strategies where the watchdog can be disabled independently of the voltage monitoring function.

Supervisors Part Context

This device belongs to the XC6121/XC6122/XC6123/XC6124 series of voltage detectors from Torex Semiconductor. These ICs are fabricated using CMOS process technology to achieve high precision and low current consumption. The series shares common architectural features such as reference voltage sources, comparators, and output drivers, differing primarily in package types, specific detection voltages, and enable pin configurations.

Supervisors Replacement Considerations

Cross-reference with other XC6121 variants having similar detection voltages and package styles. Verify that substitute parts support the same watchdog timeout settings and open-drain output requirements. Ensure replacement components match the 1 V to 6 V operating voltage range and -40°C to +85°C temperature specifications.