MAX6385XS21D4-T

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Introduction

The MAX6385XS21D4-T is a dedicated supervisor designed by Maxim Integrated, the leading component manufacturer in the world. It is a low-power, single-channel supervisor with a maximum monitoring voltage of 6.5V. It has a very low quiescent current draw of 10nA. Its integrated internal comparator and built-in hysteresis help to provide a precise voltage threshold accuracy of ±1.9mV. With its compact form factor and extended temperature range, the MAX6385XS21D4-T is designed to meet a wide range of applications, from embedded applications in active electronics, to the automotive and industrial markets.

Application field

The MAX6385XS21D4-T is well-suited for use in general-purpose monitoring of active and standby supplies in Miniature System Enclosures (MSEs) and comer powering boxes. It is also suitable for single-channel monitoring of automotive electronics, such as ECUs and Alternators. In these applications, its low supply current and wide temperature range ensure reliable operation in harsh environments. The MAX6385XS21D4-T can also be used in industrial applications where it forms the gatekeeper of electronic systems and sets the correct level and time thresholds for system operations.

Working Principle

The MAX6385XS21D4-T is an active supervisor with an input monitoring pin and an output reset pin. The MAX6385XS21D4-T monitors the voltage on its input pin and has an integrated comparator that compares the input voltage with the programmed threshold level. If the input voltage goes below the set threshold level, the comparator triggers a low output reset signal to the system, signaling a power intervention.

The MAX6385XS21D4-T also has an analog watchdog feature. The analog watchdog monitors the voltage over two cycles and compares it with the set threshold. If the voltage has not returned to the set threshold within two cycles, the MAX6385XS21D4-T asserts the low output reset signal. This helps increase system reliability and protect devices from accidental current surges or drops.

The MAX6385XS21D4-T has an integrated hysteresis scheme that attenuates false triggers and stabilizes the output signal. The hysteresis scheme also provides a precise voltage threshold accuracy of ±1.9mV. Additionally, the MAX6385XS21D4-T has a built-in delay time of up to 3ms that allows the supervisor to delay the reset signal for a certain period, to filter out system noise and ensure better accuracy.

The MAX6385XS21D4-T can also be programmed to work in open-drain mode. This mode eliminates the need for external components and allows the supervisor to operate directly from an external voltage source. The MAX6385XS21D4-T also has an active-high logic output pin that can be used in conjunction with other active supervisors, or as part of a system monitoring protocol.

Conclusion

The MAX6385XS21D4-T is a dedicated supervisor designed to provide a reliable, single-channel monitoring solution for a variety of applications. It has a very low quiescent current draw of 10nA, a precise voltage threshold accuracy of ±1.9mV, and an extended temperature range. It also features an integrated hysteresis scheme to attenuate false triggers and stabilize the output signal. Additionally, the MAX6385XS21D4-T has a built-in delay time of up to 3ms and an active-high logic output pin for system monitoring.

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