MAX6386XS24D3-T

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Maxim Integrated\'s MAX6386XS24D3-T is a PMIC supervisor IC, specifically designed for 3V to 5.5V systems. The device features a Voltage-Monitor Reset pin, as well as an adjustable Voltage-Monitor Window, providing power-on reset (POR) functionality to guard against system start-up and brownout faults. This device also features a settable threshold voltage, adjustable debounce time-out delay, and reset assertion time-out. Its integrated circuitry and affordable price make it well-suited for use in a wide range of consumer and industrial applications.

Features

• 3V to 5.5V power supply operation
• Voltage-monitor (VM) reset (POR) pin
• Adjustable VM window
• Reset assertion time-out and delay time-out
• Active-low reset output
• CMOS current-limited process

Applications

• Personal computers
• Laptop computers
• x86-based embedded systems
• Post-PC peripheral devices
• SCSI enabling cards
• Printers and storage systems
• Broadband networking systems

Working Principle

The MAX6386XS24D3-T device provides an active-low reset output when the Voltage-Monitor Window is exceeded. This output is held low (asserted) until the reset circuit settles, and then deasserted.

The Voltage-Monitor is used to detect input logic voltage levels. When the VM voltage rises above the rising threshold, the reset is asserted. The Voltage-Monitor is also used to detect low power-supply conditions, such as system brownouts. The window is predetermined by adjusting the VTR and VFT thresholds. The window may also be adjusted by changing the external components associated with the thresholds.

When the VM voltage drops below the falling threshold, the reset is asserted. The reset is held for the period of time determined by the reset time-out delay, after which the reset circuit is reset again. In addition, the reset circuit may also be reset manually or by means of an external signal.

By setting the ticking frequency of the oscillator, the user can adjust the debounce time-out delay. This is done by setting the value of the external capacitor connected to the DBT pin. The debounce time-out must be set to ensure that reset occurs during the failure of consecutive logic level transitions. Reset is asserted until the system power is restored and the signal reaches the VM threshold level.

Conclusion

In conclusion, the MAX6386XS24D3-T supervisor IC provides a reliable and cost-effective solution to protect against system start-up and brownout faults. Its wide operating range, adjustable debounce time-out delay, and reset assertion time-out make it well-suited for use in a wide range of consumer and industrial applications. Its adjustable Voltage-Monitor Window also allows for easy adjustment, making it an ideal choice for system monitoring.

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