XC6121C542ER-G

Supervisors Overview

The XC6121C542ER-G is a high-precision voltage detector with watchdog function and ON/OFF control from the XC6121 series by Torex Semiconductor. It incorporates CMOS process technology, featuring a reference voltage source, delay circuit, comparator, and output driver. The detect voltage is internally fixed at 5.4V using laser trimming technology. The device operates within a supply voltage range of 1.0V to 6.0V. It includes an N-channel open-drain output configuration and supports watchdog timeout periods ranging from 50ms to 1.6s. Release delay times are selectable from 3.13ms to 400ms. The EN/ENB pin allows independent control of the watchdog function while maintaining voltage detection operation.

Supervisors Feature Summary

• Integrated watchdog timer with selectable timeout periods for microprocessor monitoring
• Built-in release delay circuit eliminates need for external components
• EN/ENB pin enables independent control of watchdog function state
• High-precision detection voltage set via internal laser trimming

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 ER-G indicates the tape and reel packaging format when ordering. Confirm the detect voltage code 542 corresponds to the required 5.4V threshold for your application design. Ensure compatibility with the 6-USPC package dimensions during PCB layout. Check for RoHS compliance documentation if required by your manufacturing standards.

Supervisors Selection Notes

Select this component when a fixed 5.4V detection threshold is required. The XC6121 variant provides standard EN/ENB pin functionality compared to other series members. Consider the available watchdog timeout options if system reset timing constraints exist. Verify that the N-channel open-drain output suits the logic levels of the connected microcontroller or system bus.

Supervisors Part Context

This part belongs to the XC6121/XC6122/XC6123/XC6124 series of voltage detectors. The XC6121 series specifically features an EN/ENB pin that requires external connection control for the watchdog function, unlike XC6122 and XC6124 which have internal pull-up/down configurations. All series share similar core architectures including low current consumption and high precision detection capabilities.

Supervisors Replacement Considerations

XC6121C542MR-G offers identical electrical specifications in a SOT-25-5 package instead of USP-6C.