MAX9140EUK+T

Overview

The MAX9140EUK+T is a single-channel, high-speed analog comparator from the MAX9140 family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from 2.7V to 5.5V and features rail-to-rail input and output capabilities. The device provides a propagation delay of 40ns with a typical supply current of 150µA per comparator at 3V. It includes internal hysteresis of 1.5mV for clean switching and offers CMOS/TTL-compatible outputs that pull within 0.3V of either supply rail without external components. The component is housed in a 5-pin SOT-23 package and supports continuous short-circuit fault conditions.

Feature Summary

• Rail-to-rail input and output voltage ranges enable direct interface with various logic families without external pull-up circuitry.
• Internal fixed hysteresis eliminates the need for external resistors while ensuring stable switching against noise.
• High-speed operation combined with low power consumption makes it suitable for portable and battery-powered applications.
• Robust input protection allows tolerance of continuous short-circuit faults to either supply rail.

Applications

• Line Receivers
• Threshold Detectors/Discriminators
• Zero-Crossing Detectors
• Sampling Circuits

Procurement Notes

Verify the specific suffix 'EUK+T' corresponds to the E-grade temperature range (-40°C to +85°C) and the SOT-23-5 package configuration. Confirm RoHS compliance status as indicated by the '+' suffix. Ensure the ordering code matches the single-channel variant rather than dual or quad versions within the same family. Cross-reference the manufacturer part number with distributor databases to confirm current availability and lead times.

Selection Notes

Select this component when a single-channel comparator with rail-to-rail I/O is required for 3V or 5V systems. It serves as a lower-power and higher-speed upgrade compared to legacy industry-standard comparators like the MAX941. Choose this part over the MAX9141 if latch enable and shutdown functions are not needed. Consider the AEC-Q100 qualified variants only if automotive qualification is explicitly required, as the standard E-grade parts do not carry this certification.

Part Context

The MAX9140EUK+T belongs to the MAX9140/MAX9141/MAX9142/MAX9144 family of high-speed, low-power comparators. While the MAX9141 adds latch and shutdown features, and the MAX9142/44 offer multiple channels, the MAX9140 provides a basic single-channel solution. This family is designed to replace older comparators with improved speed and power efficiency, specifically optimized for systems powered from 3V or 5V supplies.

Replacement Considerations

The datasheet identifies the MAX9140 as a direct upgrade replacement for the MAX941, MAX942, and MAX944 comparators. These legacy devices offer similar functionality but with slower speeds and higher power consumption. No other specific substitute part numbers are documented in the provided source material.