Analog Devices Inc./Maxim Integrated MAX9140EUK+T

Overview

The MAX9140EUK+T from Analog Devices is a single high-speed rail-to-rail input comparator optimized for 3V/5V single-supply operation, featuring 40ns propagation delay, 150μA supply current per comparator, and ±0.2V beyond-rail input common-mode range. It delivers CMOS/TTL-compatible outputs swinging within 300mV of VCC or GND and is used in battery-powered threshold detection and line receiver circuits.

For engineers reviewing the MAX9140EUK+T datasheet, MAX9140EUK+T pinout, MAX9140EUK+T application, or MAX9140EUK+T equivalent, this page provides verified electrical parameters, SC70/SOT23 package mapping, E-grade (-40°C to +85°C) operating context, and real-world interface design implications for low-power, high-speed analog decision-making.

Technical Context

The MAX9140EUK+T implements a bipolar process-based comparator core with internal 1.5mV hysteresis to suppress oscillation during slow or noisy input transitions. Its rail-to-rail input stage accepts voltages from -0.2V to VCC + 0.2V, and its current-driven output stage sources/sinks 4mA while maintaining VOH ≥ VCC − 0.425V and VOL ≤ 0.425V across temperature.

No latch or shutdown logic is present-unlike the MAX9141-making the MAX9140EUK+T a minimal, always-active comparator. Input bias current remains below 320nA over -40°C to +85°C, and offset voltage is specified at 0.5–2.0mV (typical 0.5mV) at +25°C, enabling precise zero-crossing and discriminant functions without external trimming.

Key Specifications

Pinout & Package

The MAX9140EUK+T is housed in a 5-pin SOT23 package (U5-1 land pattern), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant matte tin plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, low-power comparator applications.

Compared with LMV7215M5X/NOPB and TLV3501DBVR, the MAX9140EUK+T uniquely balances nanosecond-speed response (40ns), ultra-low quiescent current (150μA), and integrated hysteresis-enabling robust, compact, and energy-efficient threshold detection without external components or layout compromises.

Availability

The MAX9140EUK+T is available at Aetrix Electronics and suitable for battery-powered systems, line receivers, and 3V/5V industrial interface designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX9140EUK+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets.

The MAX9140EUK+T belongs to the MAX914x family of single-supply comparators designed specifically for low-power, high-speed decision-making in portable and interface-critical applications where rail-to-rail input range and deterministic propagation delay are essential.

FAQ

What is the operating temperature range for the MAX9140EUK+T?

The MAX9140EUK+T is rated for the E-grade industrial temperature range of -40°C to +85°C. This specification is guaranteed across all electrical parameters including propagation delay, offset voltage, and supply current. The device uses a bipolar process and is not qualified to AEC-Q100; for automotive use, the MAX9140AAXK/V+T variant must be selected instead. All thermal limits-including junction temperature (150°C) and storage range (-65°C to +150°C)-are defined in the Absolute Maximum Ratings table.

Does the MAX9140EUK+T include shutdown or latch functionality?

No, the MAX9140EUK+T does not include shutdown or latch functionality. These features are exclusive to the MAX9141 variant (which adds SHDN and LE pins). The MAX9140EUK+T is a minimal, always-active comparator with only five pins: VCC, GND, IN+, IN−, and OUT. Its fixed-function architecture eliminates control logic overhead, reducing both quiescent current (150μA) and PCB footprint-making it ideal for space- and power-constrained applications where continuous monitoring is required.

What package type and marking does the MAX9140EUK+T use?

The MAX9140EUK+T is supplied in a 5-pin SOT23 package (package code U5-1), with top-side laser marking "+ADQP". It is RoHS-compliant (lead-free) and tape-and-reel packaged (T suffix). This package shares mechanical dimensions and solder profile compatibility with the SC70 variant (MAX9140EXK+T), but uses different land pattern geometry-designers must apply the U5-1 footprint (land pattern no. 90-0174) and verify reflow profile per Analog Devices' SOT23 assembly guidelines.

Can the MAX9140EUK+T drive standard TTL or CMOS logic directly?

Yes, the MAX9140EUK+T can drive standard TTL and CMOS logic directly. Its push-pull output delivers VOH ≥ VCC − 0.425V and VOL ≤ 0.425V at 4mA load, meeting TTL VOH (≥2.4V at VCC = 5V) and CMOS VIH (≥70% VCC) requirements across the full -40°C to +85°C range. No external pull-up resistors are needed. However, capacitive loading above 15pF increases propagation delay nonlinearly-keep trace lengths short and avoid stubs when interfacing to high-capacitance inputs like microcontroller GPIOs with Schmitt triggers enabled.

How does the internal hysteresis of the MAX9140EUK+T improve system reliability?

The MAX9140EUK+T incorporates a fixed 1.5mV internal hysteresis that creates distinct upper and lower input trip points, preventing output oscillation during slow-moving or noisy input transitions near the decision threshold. This eliminates the need for external positive feedback resistors-reducing BOM count, PCB area, and layout sensitivity. In practice, this ensures clean, chatter-free digital outputs in applications like zero-crossing detection or battery voltage monitoring, even when input signals exhibit 1–2mV of broadband noise or slew rates below 10mV/μs.