Analog Devices Inc./Maxim Integrated LMX339HAUD+T

Overview

LMX339HAUD+T from Maxim Integrated is a quad, open-drain, low-voltage comparator with internal 2mV hysteresis, rated for -40°C to +125°C operation, 1.8V–5.5V supply range, and 200µA typical supply current per comparator at 5V. It delivers 100ns propagation delay (tPHL/tPLH) at 100mV overdrive and 70mV output saturation voltage at 4mA sink, used in automotive sensor signal conditioning and battery-monitoring circuits.

For engineers reviewing the LMX339HAUD+T datasheet, LMX339HAUD+T pinout, LMX339HAUD+T application, or LMX339HAUD+T equivalent, key selection criteria include guaranteed hysteresis, extended temperature compliance, open-drain output drive capability, and TSSOP-14 package compatibility with high-density PCB layouts.

Technical Context

The LMX339HAUD+T implements four independent rail-to-rail input comparators using submicron CMOS process technology, enabling wide common-mode input range (–0.1V to VDD – 0.7V) and no phase reversal under overdriven inputs. Its internal hysteresis is fixed at 2mV and stable across temperature (±0.2mV variation from –40°C to +125°C) and supply voltage (1.8V–5.5V).

Each comparator features open-drain NMOS output capable of sinking up to 73mA at 5V (typical), with output saturation voltage ≤700mV at 4mA load and ≤100mV at 1mA load. The device achieves 60dB minimum PSRR and 70dB typical PSRR over 1.8V–5.5V supply range, supporting noise-sensitive analog threshold detection in mixed-signal systems.

Key Specifications

Pinout & Package

LMX339HAUD+T is housed in a 14-pin TSSOP package (4.4mm × 5.0mm × 1.2mm, 0.65mm pitch), optimized for automated assembly and thermal performance in space-constrained automotive modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad open-drain comparator applications.

Compared with LM339DR and TLV339IPWR, LMX339HAUD+T uniquely combines automotive temperature rating, internal 2mV hysteresis, and TSSOP-14 packaging - eliminating design compromises between noise immunity, power efficiency, and environmental robustness.

Availability

LMX339HAUD+T is available at Aetrix Electronics and suitable for automotive body control modules, battery management systems, and industrial power sequencers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LMX339HAUD+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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for automotive, industrial, and communications markets, emphasizing high reliability and extended temperature performance.

The LMX339HAUD+T belongs to Maxim's LMX339H quad comparator product line, engineered specifically for noise-immune, low-voltage threshold detection in automotive and harsh-environment applications.

FAQ

What is the maximum sink current capability of each output in LMX339HAUD+T?

Each open-drain output of the LMX339HAUD+T can sink up to 73mA at VDD = 5.0V and TA = +25°C (typical), with guaranteed minimum of 10mA across –40°C to +125°C. This enables direct driving of LEDs, small relays, or logic inputs without external buffers - a key advantage over standard comparators with weaker output stages.

Does LMX339HAUD+T require external hysteresis components?

No, LMX339HAUD+T integrates 2mV of internal hysteresis across all four comparators, eliminating the need for external positive-feedback resistors. This simplifies PCB layout, reduces component count, and ensures consistent hysteresis performance across temperature and supply voltage - confirmed in the device's Typical Operating Characteristics (Figure LMX331 toc10 and toc11).

Is LMX339HAUD+T pin-compatible with standard LM339 variants?

LMX339HAUD+T is not pin-compatible with LM339 or LM239 due to different pin assignments: LMX339HAUD+T uses Pins 1/3/4/6/7/8/9/10/11/12/13/14 for inputs and outputs, while LM339 uses Pins 1/2/3/4/5/6/7/8/9/10/11/12/13/14 with VDD on Pin 16 (SO-14). Always verify pin mapping using the official LMX339HAUD+T Pin Description table before board reuse.

What is the input common-mode voltage range for LMX339HAUD+T?

The input common-mode voltage range for LMX339HAUD+T extends from –0.1V below VSS to VDD – 0.7V, supporting ground-referenced sensors and rail-to-rail input operation. At VDD = 5.0V, this yields a usable range of –0.1V to +4.3V - verified across –40°C to +125°C in DC Electrical Characteristics tables.

Can LMX339HAUD+T operate from a 1.8V supply?

Yes, LMX339HAUD+T is fully specified down to 1.8V supply voltage, with guaranteed performance including 200µA max supply current per comparator, 2mV hysteresis, and 500ns propagation delay (10mV overdrive). This makes it suitable for modern low-voltage microcontroller interfaces and energy-harvesting systems where supply headroom is constrained.