MAX6338IUB+T

Overview

The MAX6338IUB+T is a quad voltage monitor manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of 2.5 V to 5.5 V and consumes 35 uA of quiescent current. The device features four active low, open drain outputs with fixed thresholds of 1.8 V, 2.5 V, 3.3 V, and 5 V. Undervoltage thresholds are specified at 1.53 V, 2.13 V, 2.85 V, and 4.25 V, while overvoltage thresholds are set at 1.62 V, 2.25 V, 3 V, and 4.5 V. It lacks manual reset and watchdog timer functions. The component is housed in a UMAX-10 surface-mount package and supports an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides simultaneous monitoring of four independent power rails using dedicated inputs.
• Generates active low reset signals via open-drain outputs when supply voltages deviate from defined limits.
• Integrates fixed threshold detection for standard logic levels without requiring external programming.

Applications

• Multi-rail power sequencing in embedded systems
• Voltage supervision for microprocessor and FPGA core supplies
• Industrial control board power integrity monitoring

Procurement Notes

Verify the suffix 'I' indicates industrial temperature grade (-40°C to +85°C) and 'UB' denotes the UMAX-10 package. Confirm '+T' specifies tape and reel packaging. Ensure compatibility with 2.5 V to 5.5 V supply ranges. Check RoHS compliance status through official manufacturer documentation before integration into regulated products.

Selection Notes

Select this component when fixed thresholds for 1.8 V, 2.5 V, 3.3 V, and 5 V rails are required. It suits designs needing low quiescent current and compact UMAX-10 packaging. Avoid if manual reset capability or adjustable thresholds are necessary. Verify that open-drain output configuration aligns with downstream logic requirements.

Part Context

Part of the MAX6338 family of quad voltage monitors. Shares common architecture with variants like MAX6338GUB+T and MAX6338PUB+, differing primarily in threshold configurations and temperature grades. Designed for applications requiring reliable supervision of multiple power domains in space-constrained environments.

Replacement Considerations

Direct substitutes include other MAX6338 variants with matching UMAX-10 packages and compatible threshold sets. Verify electrical parameters such as quiescent current and reset timeout against specific design requirements before substitution.