Maxim Integrated MAX6312UK33D4 Microprocessor Reset Circuit

The MAX6312UK33D4 is a precision, low-power microprocessor (μP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with +3.3V-powered circuits.

This compact supervisory circuit is specifically engineered to maintain system integrity by monitoring the power supply voltage levels. In the event that the supply voltage drops below a preset threshold, the MAX6312UK33D4 asserts a reset signal to prevent the μP from operating under potentially harmful conditions such as low voltage, which could lead to erratic behavior or data corruption.

The reset output from the MAX6312UK33D4 remains asserted for a minimum timeout period after V<sub>CC has risen above the reset threshold level, ensuring the system has adequate time to stabilize before the processor is allowed to run. The device comes in a compact SOT-23 package, making it suitable for space-constrained applications.

Key features of the MAX6312UK33D4 include:

• A preset V<sub>CC reset threshold of 3.3V tailored for use with +3.3V power supplies.
• Low supply current of 1μA, which is ideal for battery-operated equipment.
• A guaranteed reset valid to V<sub>CC = 1V, which ensures reliable system reset even during low voltage conditions.
• No external components are required, which simplifies circuit design and reduces overall system cost.
• Immunity to short V<sub>CC transients, which prevents false resets and system disturbances.

The MAX6312UK33D4 is an ideal choice for portable devices, computers, controllers, intelligent instruments, and critical μP power monitoring. Its robust design ensures that digital systems operate reliably and safely by providing a dependable reset signal whenever necessary. With its easy integration and proven performance, this reset circuit from Maxim Integrated is a trusted solution for maintaining the proper function of a wide range of electronic devices.