Maxim Integrated MAX6804US29D3-T Microprocessor Reset Circuit

The MAX6804US29D3-T is a compact, highly reliable microprocessor (µP) supervisory circuit designed and manufactured by Maxim Integrated. This device is engineered to monitor power supplies in µP and digital systems, providing a significant layer of protection against low voltage and other fault conditions. It ensures that the µP is reset to a known state during power-up, power-down, or brown-out conditions.

One of the key features of the MAX6804US29D3-T is its ability to assert a reset signal whenever the VCC supply voltage falls below a preset threshold, 2.93V for this specific model. The reset output remains asserted for a minimum of 140ms after VCC has risen above the reset threshold, ensuring the system has stabilized before the processor begins operation. This timing precision is maintained over a wide temperature range and does not require any external components.

This device comes in a small, 4-pin SOT143 package, making it an ideal choice for space-constrained applications. It has a low supply current of 5µA (typical), which is particularly beneficial for portable and battery-operated equipment, helping to extend the battery life.

The MAX6804US29D3-T also features a debounced manual reset input. This manual reset input can be triggered with a push-button to allow for a simple and user-initiated system reset. The device's ability to interface with the power supply and logic components makes it a versatile solution for a wide range of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring, and portable/battery-powered equipment.

Furthermore, the MAX6804US29D3-T is designed with robustness in mind, with the ability to withstand transient overvoltage events and ESD strikes. Its reliability and performance are recognized across the industry, making it a trusted choice for mission-critical applications where consistent operation is paramount.

In summary, the Maxim Integrated MAX6804US29D3-T is a highly efficient, reliable, and space-saving µP supervisory circuit that provides essential protection for digital systems, ensuring proper operation even under adverse power conditions.