Analog Devices Inc./Maxim Integrated MAX944ESD+TG52

Overview

MAX944ESD+TG52 from Maxim Integrated is a quad high-speed comparator optimized for 3V/5V single-supply systems, featuring rail-to-rail inputs, 80ns propagation delay (5mV overdrive), 350μA per comparator supply current, and CMOS/TTL-compatible push-pull outputs. It operates from 2.7V to 5.5V and is used in precision threshold detection and line receiver circuits requiring low power and fast response.

For engineers reviewing the MAX944ESD+TG52 datasheet, MAX944ESD+TG52 pinout, MAX944ESD+TG52 application, or MAX944ESD+TG52 equivalent, key selection criteria include guaranteed 80ns propagation delay at 5mV overdrive, rail-to-rail input range extending beyond supply rails, internal hysteresis for noise immunity, output swing within 0.4V of V+ and GND, and compatibility with 14-pin SO packaging for space-constrained PCB layouts.

Technical Context

The MAX944ESD+TG52 implements a bipolar process-based comparator core with internal hysteresis (1mV typical input-referred width), eliminating external feedback components. Its input stage tolerates continuous short-circuit faults to either rail and supports common-mode voltages from –0.2V to V+ + 0.2V.

The output stage is current-driven, delivering 400μA source/sink capability while maintaining VOH ≥ V+ – 0.4V and VOL ≤ 0.4V under load. Propagation delay skew between channels is ≤10ns, and differential propagation delay is ≤10ns - critical for multi-channel timing alignment in sampling circuits and zero-crossing detectors.

Key Specifications

Pinout & Package

MAX944ESD+TG52 is housed in a 14-pin narrow SO (Small Outline) package, RoHS-compliant, with 1.27mm pitch and standard JEDEC MS-012AC outline. Thermal resistance θJA = 8.33mW/°C above +70°C; max power dissipation = 667mW at TA = +70°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX944ESD+TG52, LM339DR trades speed and input flexibility for cost and legacy compatibility, while TLV3502IDR delivers superior speed and efficiency at the expense of channel density and pinout simplicity - making MAX944ESD+TG52 optimal for balanced performance in space- and power-constrained 3V/5V industrial designs.

Availability

MAX944ESD+TG52 is available at Aetrix Electronics and suitable for battery-powered systems, industrial line receivers, threshold discriminators, and zero-crossing detectors requiring stable component supply across extended temperature ranges.

Supply support for MAX944ESD+TG52 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

Maxim Integrated, now part of Analog Devices, designs precision analog and mixed-signal ICs for industrial, medical, and communications applications, with emphasis on low-power, high-reliability solutions.

The MAX941/MAX942/MAX944 family was engineered specifically for high-speed, low-power, single-supply comparator applications in portable and 3V/5V embedded systems - prioritizing rail-to-rail operation, internal hysteresis, and fault tolerance.

FAQ

What is the operating temperature range for MAX944ESD+TG52?

The MAX944ESD+TG52 is rated for industrial operation from –40°C to +85°C, as confirmed by its "E" grade suffix and ordering information table. This range is validated across all key parameters including propagation delay, offset voltage, and supply current - ensuring reliable performance in harsh environments such as factory automation and outdoor instrumentation where thermal cycling occurs.

Does MAX944ESD+TG52 support rail-to-rail input operation?

Yes, MAX944ESD+TG52 supports true rail-to-rail input operation with a common-mode input voltage range of –0.2V to V+ + 0.2V. This specification is explicitly guaranteed in the Electrical Characteristics table and enables interface with sensors or DACs whose outputs exceed the supply rails - a key advantage over standard comparators limited to GND-to-V+ input ranges.

Can MAX944ESD+TG52 drive TTL and CMOS logic directly?

Yes, MAX944ESD+TG52 can drive TTL and CMOS logic directly without external pull-up resistors. Its outputs swing to within 0.4V of both V+ and GND under 400μA load, meeting TTL VOH/VOL thresholds and exceeding CMOS VIH/VIL requirements for 3V and 5V supplies - verified in the Electrical Characteristics table under VOH and VOL parameters.

Is internal hysteresis present in MAX944ESD+TG52, and what is its value?

Yes, MAX944ESD+TG52 includes fixed internal hysteresis of approximately 1mV input-referred width, as specified in the Electrical Characteristics table under "Input-Referred Trip Points." This hysteresis eliminates oscillation on slow-moving or noisy inputs and removes the need for external positive feedback networks - a distinguishing feature versus basic comparators like LM339.

What package type is used for MAX944ESD+TG52, and are footprint details available?

MAX944ESD+TG52 uses a 14-pin narrow SO (Small Outline) package with JEDEC MS-012AC outline and 1.27mm lead pitch. Land pattern number 90-0112 is documented in the Package Information section, and official footprint drawings are available at maximintegrated.com/packages - enabling precise PCB layout for automated assembly and thermal reliability.