MAX6461UR31+T

Series:	--
Packaging:	Strip
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Push-Pull, Push-Pull
Reset:	Active Low
Reset Timeout:	14 µs Typical Propagation Delay
Voltage - Threshold:	3.1V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3

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Introduction

This article examines the application field and working principle of the MAX6461UR31+T; a supervisory circuit in the Peripheral Monitoring Integrated Circles (PMICs) family. With the increasing trends in electronic and electronic device development, PMICs have become a popular choice when it comes to monitoring the peripherals within any electronic design. The MAX6461UR31+T supervisory circuit helps in the complex monitoring task by providing precise levels of voltage detection and comparator thermals. Its extensive feature-set is enriched with programmable reset functions, precise adjustable threshold reset, auto-retry reset and power fail detection.

Application Field

The MAX6461UR31+T is mainly intended for industrial applications and has a wide range of uses. It’s typically used to guard processor-based systems including But, computer, printer and so on, but can also be used for a wide range of other applications such as HVAC, white-goods, automotive, medical instruments and aircraft applications. due to its exceptional accuracy, the circuit is also suitable for power management systems in cellular and other wireless communication systems. The device includes 4 channels which can be individually programmed and configured to monitor either dc or ac signals. The MAX6461UR31+T supervisory circuit serves three main functions: monitoring, reset and power-fail detection. It is designed to detect a wide range of voltage levels by providing precise reference voltages that can be compared against. This helps in the detection of low voltage levels (e.g. memory power, battery voltage) as well as high levels (e.g. step-up converter).The adjustable reset functions are also provided by the MAX6461UR31+T supervisory circuit. The circuit has two pre-programmable output options: reset and retry. The reset allows for power up and reset sequences, while the ’retry’ option is for repeated attempts due to a detected fault/low voltage.The power fail detection provided by the MAX6461UR31+T also helps to ensure that the system is powered correctly and that the system is performing within the required specifications. It helps to prevent over-voltage and under-voltage from occurring by actively monitoring the input voltage level.

Working Principle

The MAX6461UR31+T supervisory circuit is essentially an analog-to-digital monitoring circuit which operates based on an integrated voltage detector. The circuit is powered by a 5V power supply. On power-up, two comparator op-amp circuits detect the input voltage level and compare it to the reference voltage. The output is given as either a digital code or an analog voltage depending on the configuration. If the voltage level is close to the reference voltage, then the supervisory circuit will output a digital high that can be used to control subsequent stages. The circuit is also configured to issue a digital low output when the input voltage level is below the reference voltage; this is used for resetting the system.The MAX6461UR31+T supervisory circuit also has a number of programmable features to enhance its functionality. The threshold voltage, see-tolerance and auto-retry delay parameters can be adjusted via an internal pin or through external circuits. Furthermore, an internal temperature sensor is also included to detect and alert of any temperature-related issues.

Conclusion

The MAX6461UR31+T is a powerful supervisory circuit designed to guard processor-based systems. The circuit is ideal for a wide range of applications; it allows for precise voltage detection and reset timing, enables power-fail detection and contains an integrated temperature sensor. With its adjustable reset functions and integrated voltage detectors, the MAX6461UR31+T is a versatile, easy-to-use supervisory circuit well suited for monitoring the peripherals of any system.

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