MAX6394US317D4+T

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The MAX6394US317D4+T is a member of the MAX6394 Microprocessor supervisory circuit family from Maxim Integrated. It is an integrated low-voltage, single supply supervisory circuit for system power control and monitoring. The device combines two ultra-low power comparators with dual active reset outputs, watchdogs, and voltage spikes countermeasures (VSCM) circuitry in a single package. This application field and working principle makes the device suitable for a variety of applications, such as microprocessor, audio, data storage, and power supply design.

The MAX6394US317D4+T operating voltage range is 4.65V to 7.5V and its reset threshold can range from 2.7V to 4.8V. The reset threshold can be programmed via an external resistor. The device also features a watchdog timeout that can be programmed via an external capacitor. It has two active reset outputs that are active High, Active Low, and a push-pull for flexibility in controller reset activation and deactivation.

The MAX6394US317D4+T circuit includes an internally trimmed, high-accuracy comparator and a watchdog timer. The comparator monitors the system voltage and detects when the voltage falls below a predetermined threshold. The watchdog timer monitors the master clock for live-cycle operation, periodic timing reset, and system initialization. In addition, the device includes a glitch filter that requires a valid reset pulse and a voltage-spike countermeasures circuitry that eliminates spurious resetting caused by short duration transients or glitches in the power-supply line.

The voltage-spike countermeasures circuitry features a transient voltage threshold detector, charge pump voltage level shifter, and debounce logic. Any transient on the power line that crosses the transient-voltage-threshold detector will be blocked. When the countermeasures circuit is active, the power-supply voltage can be monitored after the transient level has recovered. This ensures that the resetting of the device only occurs if the power-supply voltage fails to recover to its predetermined threshold after a transient.

The MAX6394US317D4+T device includes an independent watchdog timer and reset functions. The watchdog timer is used to detect system lock-up conditions or timing errors and initiate a reset to restart the system. The watchdog timeout can be programmed to any value from 40ms to 8 seconds by setting an external capacitor, allowing the designer to fine-tune the timeout to match the system requirements. The reset output is also active-high, active-low, and push-pull selectable, allowing the reset output to be tailored to match the controller requirements.

The MAX6394US317D4+T device also includes an open-drain power-on reset (POR) output. The POR output is active at power-up and monitors the supply voltage until it reaches a predetermined level. At that point, the POR output is deactivated, indicating that the power supply is stable and ready for system operations. This feature eliminates the need for an external POR circuit, reducing component cost and board space.

The MAX6394US317D4+T device includes several protection functions that help to ensure reliable system operation and prevent damage from voltage spikes and transients. The device includes an active-low short-circuit protection (SCP) output and an active-high over-voltage protection (OVP) output. The SCP output goes active when the power-supply voltage falls below 3.2V or rises above 4.5V. The SCP output can be used to shut down the power-supply output if either of these conditions are violated. The OVP output can be used to detect an over-voltage condition on the power supply, allowing the system to be shutdown before damage is done.

The MAX6394US317D4+T device is ideal for microprocessor applications, audio systems, data storage, and power supply design. This integrated low-voltage, single supply supervisory circuit provides system power control and monitoring in a compact package. It includes a voltage monitor, watchdog timer, reset signal, power-on reset output, and voltage-spike countermeasures circuitry to ensure reliable system operation and protection from voltage spikes and transients. It is available in a 3mm x 3mm TQFN package.

The specific data is subject to PDF, and the above content is for reference