MAX6338JUB

Overview

The MAX6338JUB+ is a quad voltage monitor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors up to four independent power supply rails simultaneously without requiring external components. The device features factory-trimmed threshold voltages and supply tolerances optimized for specific applications, including +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V inputs. An additional high-input impedance comparator option allows use as an adjustable voltage monitor or general-purpose comparator. It operates within a temperature range of -40°C to +85°C and is housed in a uMAX package.

Feature Summary

• Simultaneous monitoring of up to four independent power supply rails
• Factory-trimmed threshold voltages and supply tolerances for optimized performance
• High-input impedance comparator option for adjustable voltage monitoring
• Compact uMAX package design

Applications

• Monitoring multiple power supplies in embedded systems
• Adjustable voltage monitoring in industrial equipment
• General-purpose comparator applications in electronic circuits

Procurement Notes

Verify the exact suffix (e.g., JUB+) against the manufacturer's official datasheet to confirm pinout, threshold specifications, and package type. Ensure compatibility with your system's voltage levels and operating temperature range before procurement. Confirm availability status directly with authorized distributors, as stock levels may vary.

Selection Notes

Select this component when simultaneous monitoring of four distinct voltage rails is required in a compact form factor. Consider the available factory-trimmed thresholds (+5.0V, +3.3V, etc.) to ensure they match your system's supply voltages. The high-input impedance comparator feature offers flexibility for adjustable monitoring needs. Verify that the uMAX package fits your PCB layout constraints.

Part Context

The MAX6338 series belongs to Maxim Integrated's family of microprocessor reset supervisory circuits designed for power supply management. These devices provide reliable voltage monitoring and reset generation for digital systems. The MAX6338 specifically addresses applications requiring multi-rail supervision in space-constrained environments, leveraging internal trimming for accuracy without external components.

Replacement Considerations

Consult the manufacturer's official cross-reference documentation for verified substitute part numbers. Ensure any replacement maintains compatible threshold voltages, package dimensions, and operating temperature ranges. Verify functional equivalence for quad monitoring and comparator capabilities before implementation.