MAX6335US18D3

Overview

The MAX6335US18D3 is a microprocessor supervisory circuit from the MAX6335/36/37 family, manufactured by Analog Devices Inc./Maxim Integrated. It monitors power supplies in 1.8V to 3.3V systems and asserts an active-high reset signal when VCC declines below a preset threshold or upon manual reset assertion. The device features a debounced manual-reset input and guarantees correct state for VCC down to 0.7V. It operates within a temperature range of -40°C to +125°C (TA) and utilizes a SOT-143-4 surface-mount package.

Feature Summary

• Active-high push/pull RESET output
• Debounced manual-reset input
• Ultra-low 0.7V operating supply voltage

Applications

• Microprocessor (µP) supervisory circuits
• Digital system power monitoring
• Space-critical applications requiring compact packaging

Procurement Notes

Verify component authenticity through authorized channels due to potential counterfeit risks. Confirm that the specific suffix 'D3' corresponds to the required 1.8V threshold variant as per official datasheets. Ensure compliance with RoHS3 specifications and check for any discontinuation notices or lifecycle status updates directly from the manufacturer before finalizing procurement decisions.

Selection Notes

Select this component when an active-high reset output is specifically required, distinguishing it from the active-low variants in the same family. The 1.8V threshold setting makes it suitable for low-voltage digital systems. Consider the SOT-143-4 package size for space-constrained designs. Verify that the 0.7V minimum operating voltage meets the lowest expected supply rail conditions during brown-out scenarios.

Part Context

The MAX6335US18D3 belongs to the MAX6335/MAX6336/MAX6337 series of µP supervisory circuits designed to increase reliability and reduce cost by eliminating external components. These devices perform single-function monitoring, asserting reset signals based on voltage thresholds or manual inputs. The series offers factory-trimmable thresholds between 1.6V and 2.5V, with standard versions available in 2500-piece quantities.

Replacement Considerations

Direct functional substitutes within the same family include MAX6335US18D2+T (different threshold) and MAX6336US18D3+T (active-low output). Cross-referencing the exact threshold voltage and output polarity is essential when considering alternative part numbers from the MAX633x series.