Maxim Integrated MAX6383XR31D3 Microprocessor Reset Circuit

The MAX6383XR31D3 from Maxim Integrated is a highly compact, low-power microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used for system monitoring.

This supervisory circuit ensures that the µP powers up in a known state and remains in that state until the supply voltage reaches an acceptable level for reliable system operation. It achieves this through its precise monitoring of the VCC supply voltage, featuring a factory-set reset threshold of 3.1 volts. When VCC falls below this threshold, the reset output is forced to go active, thereby holding the connected µP in a reset state for a minimum of 140ms (typical) after VCC rises above the reset threshold. This timeout ensures that the system has stabilized before the µP is allowed to run.

The MAX6383XR31D3 comes in a small SC70 package, making it ideal for space-constrained applications. It is characterized for operation over the extended industrial temperature range of -40°C to +125°C, ensuring reliable performance in harsh environments.

Key features of the MAX6383XR31D3 include:

• Factory-Set Reset Threshold Voltage: 3.1V
• Minimum Reset Timeout Period: 140ms
• Low Supply Current: 1.2µA (typical)
• Guaranteed Reset Valid to VCC = 1V
• Immune to Short VCC Transients
• No External Components Required
• Compact SC70 Package
• Extended Temperature Range: -40°C to +125°C

This reset IC is an ideal choice for portable/battery-powered equipment, computers, controllers, intelligent instruments, critical µP and µC power monitoring, and other applications where size, reliability, and power consumption are critical considerations.

The MAX6383XR31D3's robust feature set ensures that it can help prevent system errors and malfunctions by providing a reliable hardware monitoring solution to safeguard your digital systems.