Maxim Integrated MAX6804US46D3+T Microprocessor Reset Circuits

The MAX6804US46D3+T is a compact, highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems that require battery backup and power-fail warning.

This supervisory circuit ensures that the µP is reset to a known state upon power-up by providing a precision voltage monitor. The MAX6804 operates with a supply voltage range from 1.2V to 5.5V, making it suitable for use in a wide array of applications, including portable/battery-powered equipment, computers, controllers, and intelligent instruments.

One of the key features of the MAX6804US46D3+T is its ability to assert a reset signal whenever the V<sub>CC supply voltage falls below a preset threshold, maintaining it for at least 140ms after V<sub>CC has risen above the reset threshold. The reset threshold for this particular device is 4.63V, which is ideal for ensuring proper operation in 5V-powered systems.

The device comes in a compact 4-pin SOT143 package, which is highly beneficial for space-constrained applications. Additionally, the MAX6804US46D3+T is available in a tape and reel format denoted by the '+T', which facilitates automated manufacturing processes.

Other notable features of the MAX6804 include a low supply current of 6µA, making it an energy-efficient solution for power-sensitive designs. It also offers an active-low reset output, which is guaranteed to be in the correct state for V<sub>CC down to 1.2V, providing added security for proper system reset even in low-voltage conditions.

With its precision monitoring capability and robust feature set, the Maxim Integrated MAX6804US46D3+T is an excellent choice for designers seeking a reliable, easy-to-implement reset circuit solution for their microprocessor-based systems.