XC6121D518ER-G

Supervisors Overview

The XC6121D518ER-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 threshold voltage of 1.8V, an operating voltage range of 1.6V to 5.0V, and an N-channel open drain output configuration. The device includes a built-in delay circuit for release delay time and supports watchdog timeout periods ranging from 50ms to 1.6s. It operates within a temperature range of -40°C to +85°C and is housed in a 6-USP (1.8x2) package.

Supervisors Feature Summary

• Integrates a watchdog timer function that outputs a reset signal if the watchdog input maintains a specific logic level within the timeout period.
• Includes an EN/ENB pin that allows external control to force the watchdog function off while keeping the voltage detector operational.
• Utilizes laser trimming technology to ensure internally fixed detect voltages with high precision across the specified range.

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 exact suffix 'D518' corresponds to the 1.8V threshold and D-series watchdog timing options against the official Torex datasheet ETR0209-011b. Confirm RoHS compliance and USP-6 packaging details. Ensure the EN/ENB pin handling matches the XC6121 series specifications, as XC6122/24 variants have internal pull-ups/downs not present here.

Supervisors Selection Notes

Select this component when a fixed 1.8V detection threshold is required alongside integrated watchdog functionality. The XC6121 series is suitable for applications needing ON/OFF control of the watchdog via the EN/ENB pin without internal pull resistors. Consider the available watchdog timeout settings and release delay times to match system timing requirements.

Supervisors Part Context

This part belongs to the XC6121/XC6122/XC6123/XC6124 series of voltage detectors. The XC6121 variant specifically lacks internal pull-up or pull-down resistors on the EN/ENB pin, requiring external connection management if the pin is left open, unlike the XC6122 and XC6124 series which have defined internal states for this pin.

Supervisors Replacement Considerations

XC6121C518ER-G: Same 1.8V threshold but different watchdog/release delay characteristics. XC6121D520ER-G: Similar D-series timing but 2.0V threshold. XC6122D518ER-G: Includes internal pull-up on EN/ENB pin, altering interface requirements.