MAX9141EKA+T

Overview

The MAX9141EKA+T is a single-channel, high-speed analog comparator from the MAX9140 family, optimized for 3V and 5V single-supply operation. It features rail-to-rail inputs and outputs that swing within 300mV of either supply rail without external pullup circuitry. The device includes an internal latch enable (LE) pin for storing comparison results and a shutdown (SHDN) function to reduce power consumption. Key electrical parameters include a propagation delay of 40ns at 10mV overdrive, a typical supply current of 275µA per comparator at 3V, and an input offset voltage of 2mV.

Feature Summary

• Features an integrated output latch controlled by the LE pin to store comparison states.
• Includes a dedicated SHDN pin to enter low-power shutdown mode with three-state outputs.
• Provides rail-to-rail input voltage range extending beyond both power-supply rails.
• Outputs are CMOS/TTL-compatible and tolerate continuous short-circuit faults to either rail.

Applications

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

Procurement Notes

Verify the specific suffix 'EKA+T' corresponds to the 8-pin SOT-23 package in tape-and-reel format. Confirm the E-grade temperature rating (-40°C to +85°C) matches system requirements. Ensure the lead-free/RoHS-compliant status aligns with manufacturing standards. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm availability and authenticity before procurement.

Selection Notes

Select this component when a single comparator with latching capability and shutdown control is required. It is suitable for portable equipment due to its low power consumption and rail-to-rail operation. Consider the MAX9140 if latching or shutdown features are unnecessary, or the MAX9142/MAX9144 for dual/quad channel applications. Ensure the 40ns propagation delay meets the speed requirements of the target application.

Part Context

The MAX9141 is part of the MAX9140/MAX9141/MAX9142/MAX9144 family of high-speed, low-power comparators. These devices serve as upgrades to industry-standard comparators like the MAX941/MAX942/MAX944, offering higher speed and lower power. The family shares common characteristics such as rail-to-rail inputs and internal hysteresis, but varies in channel count and additional features like latching and shutdown.

Replacement Considerations

The datasheet identifies the MAX941, MAX942, and MAX944 as industry-standard comparators that the MAX914x series replaces. No other specific substitute part numbers are documented in the provided source material.

FAQ

How does the latch function operate on the MAX9141?

The output is latched when the LE pin is pulled low. The latch becomes transparent when LE is driven high, allowing the comparator to operate normally.

What is the effect of the SHDN pin on the MAX9141?

Driving the SHDN pin low places the device in shutdown mode, reducing supply current to less than 12µA and putting the output into a high-impedance state.

Can the inputs of the MAX9141 be shorted to the supply rails?

Yes, all input and output pins can tolerate a continuous short-circuit fault condition to either the VCC or GND rail without damage.