XC6121C535MR-G

Supervisors Overview

The XC6121C535MR-G is a high-precision voltage detector manufactured by Torex Semiconductor, designed for monitoring power supply integrity in electronic systems. It operates within a supply voltage range of 1.0 V to 6.0 V and features a fixed detection threshold of 3.5 V with ±2% accuracy. The device incorporates a built-in watchdog timer with selectable timeout periods ranging from 50 ms to 1.6 s, and offers release delay times from 3.13 ms to 400 ms. It utilizes an N-channel open-drain output configuration and consumes low current, with a typical operating current of 12 µA and standby current of 5 µA. The component is housed in a compact SOT-25-5 package and supports operation across a temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog function with multiple selectable timeout periods for system reliability
• Features a built-in delay circuit that eliminates the need for external components for reset timing
• Includes an EN/ENB pin allowing independent control over the watchdog function while maintaining voltage detection
• Utilizes laser trimming technology to ensure high-precision detection voltage thresholds

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 'C' indicates the correct detection voltage threshold of 3.5 V and the 'MR-G' denotes the SOT-25-5 tape and reel packaging. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the selected part number matches the required watchdog timeout and release delay specifications for the target application design.

Supervisors Selection Notes

Select this component when a fixed 3.5 V threshold is required for single-channel voltage monitoring. Consider the integrated watchdog functionality if system stability against software hangs is critical. The low current consumption makes it suitable for battery-powered applications. Verify that the open-drain output interface is compatible with the microprocessor or logic level requirements of the host system.

Supervisors Part Context

This part belongs to the XC6121 series of voltage detectors, which are characterized by high precision and low current consumption. The series employs CMOS process technology and includes reference voltage sources, delay circuits, comparators, and output drivers. The XC6121 variant specifically provides a watchdog function, distinguishing it from basic voltage detectors, making it ideal for complex digital systems requiring both power supervision and processor reset management.

Supervisors Replacement Considerations

XC6121C535MR-G-ND

Supervisors FAQ

How is the watchdog function controlled?

The watchdog function can be turned ON or OFF via the EN/ENB pin. Setting this pin to a high or low level disables the watchdog while the voltage detector continues to operate.

What is the output state during a detected fault?

The output type is active low (V_DFL low) when a voltage drop below the detection threshold is detected or when the watchdog timeout occurs.