XC6121E549ER-G

Supervisors Overview

The XC6121E549ER-G is a high-precision voltage detector with watchdog function and ON/OFF control, manufactured by Torex Semiconductor Ltd using CMOS process technology. It features a fixed detect voltage of 4.9V within the 1.6V to 5.0V range, incremented by 100mV via laser trimming. The device operates within a supply voltage range of 1.0V to 6.0V and includes an internal delay circuit for release delay times ranging from 3.13ms to 400ms. Watchdog timeout periods are selectable between 50ms and 1.6s. The output configuration is N-channel open drain, active low when detected. It supports EN/ENB pin control for watchdog enable/disable while maintaining voltage detection operation.

Supervisors Feature Summary

• Integrated watchdog timer with selectable timeout periods and manual reset capability via EN/ENB pin
• High-precision voltage detection with laser-trimmed threshold accuracy and built-in release delay circuit
• Low current consumption design suitable for battery-powered applications
• N-channel open-drain output compatible with various logic families

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 exact detect voltage code (E549 corresponds to 4.9V) against system requirements. Confirm package type USP-6 matches PCB footprint. Check RoHS compliance status if required. Ensure EN/ENB pin handling aligns with application needs since XC6121 series requires external pull-up/down unlike XC6122/XC6124. Validate operating temperature range -40°C to +85°C meets environmental specifications.

Supervisors Selection Notes

Select this part when a fixed 4.9V detection threshold is required with integrated watchdog functionality. The XC6121 series differs from XC6122/XC6124 in that its EN/ENB pin is not internally pulled, requiring external biasing for proper watchdog operation. Consider release delay time options based on system startup requirements. Verify compatibility with downstream logic levels due to open-drain output configuration.

Supervisors Part Context

Part of the XC6121/XC6122/XC6123/XC6124 series of voltage detectors. The XC6121 variant specifically requires external EN/ENB pin biasing, distinguishing it from internally biased counterparts. Uses laser trimming for precise threshold setting within the 1.6V-5.0V range. Manufactured using CMOS technology for low power consumption.

Supervisors Replacement Considerations

XC6122E549ER-G offers similar functionality but with internally pulled EN/ENB pin, simplifying board design. XC6123E549ER-G provides identical electrical characteristics with different pinout or feature set variations. Verify package compatibility and EN/ENB pin handling requirements when substituting within the series.