Analog Devices Inc./Maxim Integrated MAX9144ESD+T

Overview

The MAX9144ESD+T from Analog Devices is a quad high-speed rail-to-rail input comparator optimized for 3V/5V single-supply systems, featuring 40ns propagation delay, 150μA per comparator supply current, and ±0.2V input common-mode range beyond rails - used in line receivers, threshold discriminators, and zero-crossing detection circuits.

For engineers reviewing the MAX9144ESD+T datasheet, MAX9144ESD+T pinout, MAX9144ESD+T application, or MAX9144ESD+T equivalent, key selection criteria include propagation delay skew (≤2ns), output swing within 300mV of rails, internal 1.5mV hysteresis, and SO-14 package compatibility with industrial temperature range (-40°C to +85°C).

Technical Context

The MAX9144ESD+T implements four independent comparators in a single SO-14 package, each with bipolar input stage, current-driven output stage, and fixed internal hysteresis (1.5mV) to suppress oscillation during slow input transitions. Input protection includes back-to-back diodes and 4.1kΩ series resistors on IN+/IN- pins.

Each comparator supports rail-to-rail input voltage range (–0.2V to VCC + 0.2V), delivers CMOS/TTL-compatible outputs without external pullups, and maintains 40ns propagation delay at 10mV overdrive with ≤2ns differential skew between channels - critical for synchronized multi-channel sensing.

Key Specifications

Pinout & Package

MAX9144ESD+T is housed in a 14-pin SO (Small Outline) package with standard 1.27mm pitch, JEDEC MS-012AC compliant footprint, and RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TLV3201IDBVR, the MAX9144ESD+T uniquely delivers quad-channel integration, 40ns speed, 150μA/channel power, and internal hysteresis in a single SO-14 package - optimizing for timing-critical, multi-signal industrial sensing without layout or BOM overhead.

Availability

MAX9144ESD+T is available at Aetrix Electronics and suitable for line receivers, threshold detectors, zero-crossing detection, and 3V/5V system interfaces requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for MAX9144ESD+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 industrial, automotive, communications, and healthcare markets.

The MAX9144ESD+T belongs to the MAX914x family of high-speed, low-power, rail-to-rail comparators designed specifically for precision timing, signal conditioning, and interface bridging in battery-powered and industrial 3V/5V systems.

FAQ

What is the maximum supply voltage rating for the MAX9144ESD+T?

The MAX9144ESD+T has an absolute maximum supply voltage (VCC to GND) of +6V. Its recommended operating supply voltage range is 2.7V to 5.5V. Exceeding +6V may cause permanent damage. The device is optimized for stable operation at 3V and 5V nominal supplies, with PSRR >750 µV/V across that range - ensuring robust performance in noisy power environments typical of industrial systems using the MAX9144ESD+T.

Does the MAX9144ESD+T include internal hysteresis, and what is its value?

Yes, the MAX9144ESD+T includes fixed internal hysteresis of 1.5mV (input-referred), as confirmed in the Electrical Characteristics table. This hysteresis eliminates external feedback components and prevents output oscillation during slow-moving or noisy input transitions - a key design advantage over comparators like LM339DR that require external hysteresis networks. The 1.5mV value is tightly specified and applies uniformly across all four channels of the MAX9144ESD+T.

What are the input voltage limits relative to the supply rails for the MAX9144ESD+T?

The MAX9144ESD+T supports an input common-mode voltage range of –0.2V to VCC + 0.2V, meaning both IN+ and IN− pins tolerate signals up to 200mV beyond either supply rail. This rail-to-rail-plus margin is verified in the Absolute Maximum Ratings and Electrical Characteristics sections. It enables direct interfacing with sensors, op-amps, or DACs whose outputs exceed VCC or drop below GND - a capability critical in precision analog front-ends using the MAX9144ESD+T.

Can the MAX9144ESD+T drive TTL and CMOS logic directly without external pull-up resistors?

Yes, the MAX9144ESD+T outputs swing to within 300mV of both supply rails (VOL ≤ 0.425V, VOH ≥ VCC – 0.425V at 4mA), meeting standard CMOS and TTL logic thresholds across its full operating range. No external pull-up resistors are needed - confirmed by the "CMOS/TTL-Compatible Outputs" feature and VOH/VOL specifications. This simplifies interface design and reduces power consumption in systems integrating the MAX9144ESD+T with microcontrollers or FPGAs.

What is the operating temperature range specified for the MAX9144ESD+T?

MAX9144ESD+T is rated for the E-grade industrial temperature range of –40°C to +85°C, as documented in the Ordering Information and Absolute Maximum Ratings tables. This specification applies to all electrical parameters unless otherwise noted. The device uses a bipolar process and is not AEC-Q100 qualified (that qualification applies only to MAX9140AAXK/V+T). Designers deploying the MAX9144ESD+T in extended-temperature industrial equipment can rely on guaranteed performance across this full range.