Maxim Integrated MAX6804US44D3+T Microprocessor Reset Circuit

Introducing the MAX6804US44D3+T, a highly reliable microprocessor (μP) supervisory circuit from Maxim Integrated, designed to monitor power supplies in μP and digital systems. This compact device provides excellent circuit reliability and low cost, making it an ideal solution for a wide range of applications such as computers, controllers, and intelligent instruments.

The MAX6804US44D3+T is engineered to maintain system integrity by monitoring the power supply voltage. It asserts a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring that the μP starts up in a known state. The reset signal remains asserted for a minimum timeout period after VCC has risen above the reset threshold level, providing the system with a stable interval to recover from a low voltage condition.

This supervisory circuit offers a factory-trimmed reset threshold voltage of 4.40V, which is suitable for systems operating with 5V power supplies. The device's active-low, push-pull reset output provides a guaranteed valid reset signal for VCC down to 1.0V. It also features an impressive low supply current of only 5.5μA (typical), making it an energy-efficient choice for battery-powered applications.

Additionally, the MAX6804US44D3+T comes in a compact SOT-23 package, allowing for space-saving PCB designs. The device is specified over the extended automotive temperature range of -40°C to +125°C, ensuring reliable operation under extreme conditions.

Key features of the MAX6804US44D3+T include:

• Precise factory-set VCC reset thresholds
• Low 5.5μA supply current
• Reset valid to VCC = 1.0V
• 200ms min reset timeout period
• Compact SOT-23 packaging
• Extended automotive temperature range

Whether you are developing automotive electronics, portable devices, or complex digital systems, the Maxim Integrated MAX6804US44D3+T provides the essential protection your application needs against unpredictable voltage dips and brownouts, ensuring a reliable and robust design.