Maxim Integrated MAX6320PUK46CY Microprocessor Supervisory Circuit

The MAX6320PUK46CY from Maxim Integrated is a high-precision supervisory circuit designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. This component ensures that the system's microprocessor or microcontroller initializes in a known state during power-up, power-down, or if a brownout condition occurs.

The MAX6320PUK46CY offers several key features that make it an essential component for reliable system operation. With an integrated reset output, the device can assert a reset signal whenever the VCC supply voltage falls below the factory-set reset threshold level of 4.63V. The reset signal remains asserted for a minimum reset timeout period after VCC has risen above the reset threshold, ensuring proper system reset. This timeout period is typically 140ms, allowing adequate time for the system to stabilize.

This supervisory circuit is available in a compact SOT-23 package, making it an ideal choice for space-constrained applications. The small footprint does not compromise its performance, as it offers a low supply current of typically 5.5µA, which is beneficial for power-sensitive designs.

Additional features of the MAX6320PUK46CY include:

• High Accuracy: It has a reset threshold accuracy of ±1.5% at room temperature, which is maintained over a wide temperature range of -40°C to +125°C.
• Manual Reset Input: A manual reset input is provided, allowing for an external trigger to initiate a system reset.
• Debounce Timer: The manual reset input includes an internal debounce timer to filter out any spurious noise that may inadvertently trigger a reset.
• Low Power Consumption: The device's low quiescent current is ideal for battery-operated equipment.
• Robust Protection: The MAX6320PUK46CY provides immunity to short VCC transients, ensuring reliable operation under fluctuating power conditions.

The Maxim Integrated MAX6320PUK46CY is a versatile supervisory circuit that offers precise monitoring of system voltages, a key requirement for maintaining the integrity of digital systems. Its combination of features makes it a suitable choice for applications such as computers, controllers, intelligent instruments, and portable battery-powered equipment.