XC6121E445ER-G

Supervisors Overview

The XC6121E445ER-G is a high-precision voltage detector with an integrated watchdog timer, manufactured by Torex Semiconductor using CMOS technology. It features a fixed detect threshold voltage of 4.4V and operates within a supply voltage range of 1.0V to 6.0V. The device provides an active-low open-drain output and includes a built-in release delay circuit. It supports watchdog timeout periods ranging from 50ms to 1.6s and release delays from 3.13ms to 400ms. The component functions reliably across an operating temperature range of -40°C to +85°C and is housed in a compact 6-UFDFN exposed pad package.

Supervisors Feature Summary

• Integrates a high-precision voltage detector with a laser-trimmed fixed threshold and a watchdog timer function.
• Features an EN/ENB pin that allows independent control over the watchdog function while keeping the voltage detector operational.
• Utilizes internal pull-up or pull-down mechanisms on the enable pin to simplify circuit design when the watchdog is unused.
• Provides an open-drain output configuration suitable for direct interfacing with microprocessor reset lines.

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 against the manufacturer's latest datasheet to confirm the package type and lead-free status. Ensure the 4.4V threshold aligns with the target system voltage requirements. Confirm availability of the 6-UFDFN package variant through authorized distributors. Check for RoHS compliance documentation prior to final procurement decisions.

Supervisors Selection Notes

Select this component when a fixed 4.4V threshold is required for system supervision. The integrated watchdog eliminates external timing components, reducing board space. Consider the low current consumption for battery-operated applications. Verify that the open-drain output matches the logic levels of the connected microcontroller. Ensure the operating temperature range meets the environmental conditions of the end application.

Supervisors Part Context

This part belongs to the XC6121 series, which groups high-precision voltage detectors with watchdog functions. The series utilizes CMOS process technology to achieve low current consumption. Other variants in the family offer different threshold voltages and packages, but share the same core architecture including reference sources, comparators, and delay circuits.

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 specific level disables the watchdog while allowing the voltage detector to remain active.

What happens if the EN/ENB pin is left open?

For the XC6121 series, the EN/ENB pin behavior depends on the specific sub-series configuration. However, generally, leaving it open may result in undefined states unless internally pulled; consult the specific datasheet for pull-up/pull-down details.

Does the IC require external components for delay timing?

No, the IC incorporates a built-in delay circuit that generates release delay times without requiring any external capacitors or resistors.