MAX9141ESA-T

Overview

The MAX9141ESA-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 with a typical propagation delay of 40ns at 10mV overdrive. The device features rail-to-rail input and output capabilities, allowing direct interface with CMOS and TTL logic without external pull-up resistors. Key electrical parameters include a maximum input offset voltage of 2mV at +25°C, an internal hysteresis of 1.5mV, and a supply current of 165µA per comparator at 3V. The part includes latch enable (LE) and shutdown (SHDN) functions specific to the MAX9141 variant.

Feature Summary

• Features integrated latch enable and device shutdown control for power management and data storage.
• Provides rail-to-rail input and output voltage ranges compatible with standard logic families.
• Includes fixed internal hysteresis to ensure clean switching and prevent oscillation.
• Supports continuous short-circuit fault conditions on all input and output pins.

Applications

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

Procurement Notes

Verify the ordering suffix 'T' indicates tape-and-reel packaging when sourcing this component. Confirm the package type corresponds to the 8-pin SO specification. Ensure the grade matches the required operating temperature range, as E-grade devices are specified for -40°C to +85°C. Cross-reference the manufacturer part number with official Analog Devices documentation to confirm RoHS compliance status.

Selection Notes

Select the MAX9141ESA-T when a single comparator with latch and shutdown functionality is required. This model is suitable for systems powered by 3V or 5V supplies where low power consumption and high speed are critical. Consider this part for applications requiring rail-to-rail signal handling and direct logic interfacing without additional pull-up components.

Part Context

The MAX9141 is part of the MAX9140/MAX9141/MAX9142/MAX9144 series of high-speed, low-power comparators. It serves as a higher-speed, lower-power upgrade to industry-standard comparators like the MAX941. The MAX9141 specifically adds latch and shutdown features not present in the basic MAX9140 model, while sharing similar electrical characteristics such as propagation delay and input range.

Replacement Considerations

MAX9140EKA+T

FAQ

What is the function of the LE pin on the MAX9141?

The LE (Latch Enable) pin controls the internal latch. When LE is high, the latch is transparent. When LE is pulled low, the comparator's output state is latched.

How does the MAX9141 handle input signals beyond the supply rails?

The input common-mode range extends beyond both power-supply rails. Inputs can tolerate voltages up to 0.3V beyond either rail without damage.

What is the purpose of the SHDN pin?

The SHDN (Shutdown) pin puts the device into a low-power shutdown mode when driven low. In this state, supply current drops significantly, and the output becomes high impedance.