Analog Devices Inc./Maxim Integrated MAX9144EUD

Overview

MAX9144EUD from Analog Devices is a quad high-speed rail-to-rail input comparator optimized for 3V/5V single-supply systems, delivering 40ns propagation delay, 150μA per comparator supply current, and 500μV typical offset voltage - used in line receivers, threshold discriminators, and zero-crossing detection circuits.

For engineers reviewing the MAX9144EUD datasheet, MAX9144EUD pinout, MAX9144EUD application, or MAX9144EUD equivalent, key selection criteria include quad-channel integration in TSSOP-14, rail-to-rail input operation beyond supply rails, CMOS/TTL-compatible push-pull outputs, and internal 1.5mV hysteresis for noise-immune switching.

Technical Context

The MAX9144EUD implements four independent comparators with bipolar process technology, each featuring internal hysteresis (1.5mV), rail-to-rail input common-mode range (–0.2V to VCC + 0.2V), and output swing within 300mV of either rail. No latch or shutdown functions are present - unlike MAX9141, this variant lacks LE and SHDN pins.

All inputs tolerate continuous short-circuit faults to either supply rail, and outputs drive 4mA loads while maintaining VOH ≥ VCC – 0.425V and VOL ≤ 0.425V over –40°C to +85°C. Propagation delay skew between channels is ≤2ns, supporting precise timing alignment in multi-channel sensing.

Key Specifications

Pinout & Package

MAX9144EUD is housed in a 14-pin TSSOP package (JEDEC MO-153, 4.4mm × 5.0mm body, 0.65mm pitch), thermally rated for 727mW at +70°C with 9.1mW/°C derating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TLV3704IPW, MAX9144EUD uniquely balances 40ns speed, 150μA power, rail-to-rail inputs, and push-pull outputs in a compact TSSOP-14 - making it optimal for space-constrained, timing-critical 3V/5V embedded systems requiring four matched comparators.

Availability

MAX9144EUD is available at Aetrix Electronics and suitable for line receivers, threshold detectors, zero-crossing detection, and battery-powered systems requiring stable component supply across industrial temperature ranges.

Supply support for MAX9144EUD 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, headquartered in Wilmington, MA.

The MAX9140/MAX9141/MAX9142/MAX9144 family was designed specifically for high-speed, low-power, rail-to-rail single-supply comparator applications in portable, industrial, and communications equipment.

FAQ

What is the operating temperature range for MAX9144EUD?

The MAX9144EUD is specified for the E-grade industrial temperature range of –40°C to +85°C. This rating applies 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 automotive standards - that qualification applies only to specific MAX9140 variants (e.g., MAX9140AAXK/V+T). Thermal derating begins above +70°C, with 9.1mW/°C reduction in continuous power dissipation.

Does MAX9144EUD support rail-to-rail input operation?

Yes, MAX9144EUD supports true rail-to-rail input operation with a common-mode voltage range of –0.2V to VCC + 0.2V. This means both IN+ and IN– pins accept signals extending 200mV beyond the positive and negative supply rails without damage or false output inversion. The specification is verified across temperature and supply voltage (2.7V to 5.5V), enabling direct interface with sensors or transducers whose outputs swing outside the supply domain - a key advantage over legacy comparators like LM339.

What output configuration does MAX9144EUD use?

MAX9144EUD features push-pull (totem-pole) CMOS/TTL-compatible outputs - not open-drain. Each output (OUTA–OUTD) actively drives high (to within 300mV of VCC) and low (to within 300mV of GND) without requiring external pull-up resistors. This configuration delivers faster rise/fall times and lower static power than open-drain alternatives, and ensures direct compatibility with standard 3.3V and 5V logic families. Output short-circuit current is internally limited to protect the device during fault conditions.

Is MAX9144EUD pin-compatible with other devices in the MAX914x family?

No, MAX9144EUD is not pin-compatible with MAX9140, MAX9141, or MAX9142. It uses a 14-pin TSSOP package with dedicated pins for four independent comparators (including dual GND pins), whereas MAX9140 is 5-pin, MAX9141 is 8-pin, and MAX9142 is also 8-pin. The pinout reflects its quad-channel architecture and differs fundamentally in signal assignment, power/ground distribution, and absence of LE/SHDN control pins. Board layout must be designed specifically for the MAX9144EUD footprint.

What is the typical supply current consumption of MAX9144EUD at 3V?

At VCC = 3V and TA = –40°C to +85°C, the MAX9144EUD draws 150–250μA per comparator, resulting in a total supply current of 600–1000μA for all four channels. At +25°C and 3V, typical consumption is 150μA per comparator (600μA total). This low quiescent current enables extended operation in battery-powered applications - for example, a CR2032 coin cell (220mAh) could power MAX9144EUD continuously for over 10 months at typical conditions, assuming no additional system load.