XC6121C348MR-G

Supervisors Overview

The XC6121C348MR-G is a high-precision voltage detector with a watchdog function manufactured by Torex Semiconductor Ltd. It utilizes CMOS process technology and features an internally fixed detect voltage of 3.48V, selected from a range of 1.6V to 5.0V in 0.1V increments via laser trimming. The device operates within a supply voltage range of 1.0V to 6.0V and consumes a typical static current of 5µA. It provides an N-channel open-drain output that goes low upon detection. Key timing parameters include a standard release delay time of 50ms and selectable watchdog timeout periods ranging from 50ms to 1.6s. The component is housed in a compact SOT-25-5 package and supports an operating temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Integrates a watchdog timer function with ON/OFF control capability via the EN/ENB pin, allowing the watchdog to be disabled while the voltage detector remains active.
• Features high-precision voltage detection with a temperature coefficient of approximately +100ppm/°C, ensuring stable threshold accuracy across varying thermal conditions.
• Utilizes laser trimming technology for precise internal setting of detect voltages, eliminating the need for external resistors or components to define 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 'MR-G' corresponds to the SOT-25-5 package and reel packaging configuration as indicated in distributor listings. Confirm the detect voltage code '348' aligns with the required 3.48V threshold for your design. Ensure compatibility with the N-channel open-drain output interface. Check for RoHS compliance status if required by your manufacturing standards. Validate lead times as availability may vary between distributors.

Supervisors Selection Notes

Select this component when a fixed 3.48V threshold is required for system supervision. The integrated watchdog function simplifies design by removing external timing components. Consider the low 5µA static current for battery-powered applications. The SOT-25-5 package offers space savings compared to larger packages. Ensure the input voltage does not exceed the 6.0V maximum rating during operation.

Supervisors Part Context

This part belongs to the XC6121 series of voltage detectors from Torex Semiconductor. The series is characterized by high precision and low current consumption. The XC6121 variant specifically includes a watchdog function. Other series members like XC6122, XC6123, and XC6124 offer variations in pin configurations or additional features such as manual reset capabilities. The C348 designation indicates the specific laser-trimmed voltage threshold.

Supervisors Replacement Considerations

XC6121C235MG-G: Different detect voltage (2.35V vs 3.48V). XC6122C424MR-G: Different series with pull-down EN/ENB pin and different voltage threshold. XC6123C444MR-G: Different series with pull-up EN/ENB pin and different voltage threshold. Verify package and electrical parameters before substitution.