Analog Devices Inc./Maxim Integrated MAX9075EXK+T

Overview

MAX9075EXK+T from Maxim Integrated is a single, rail-to-rail input/output comparator optimized for ultra-low-power, single-supply portable systems. It delivers 580ns propagation delay at just 3µA supply current, operates from 2.1V to 5.5V, features ground-sensing inputs (–0.2V to V_CC – 1.2V), and drives 2mA loads with push-pull output - ideal for battery-powered threshold detection in compact space-constrained designs.

For engineers reviewing the MAX9075EXK+T datasheet, MAX9075EXK+T pinout, MAX9075EXK+T application, or MAX9075EXK+T equivalent, key selection criteria include its 3µA quiescent current, 580ns speed at ultra-low power, SC70-5 package footprint, rail-to-rail I/O capability, and absence of differential input clamping - critical for overdriven input robustness in IR receivers and digital line receivers.

Technical Context

The MAX9075EXK+T uses BiCMOS process technology to achieve low supply current while maintaining fast switching. Its input stage supports common-mode voltages down to –0.2V (ground-sensing) and up to V_CC – 1.2V, with no internal differential clamp - enabling rail-to-rail differential input voltage tolerance without phase inversion on overdrive.

The output stage employs large push-pull drivers that deliver rail-to-rail swing into 2mA loads and suppress shoot-through current during transitions, minimizing dynamic supply surges. Input bias current is typically –5nA, and input offset voltage is ±1mV (max) over temperature, supporting precision thresholding in low-voltage systems.

Key Specifications

Pinout & Package

The MAX9075EXK+T is housed in a 5-pin SC70 package (outline 21-0076), measuring 2.0mm × 1.25mm × 0.9mm - among the smallest surface-mount packages for single comparators.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar comparator applications.

Compared with TLV3691IDCKR and MAX9060EXK+T, the MAX9075EXK+T uniquely delivers 580ns speed at 3µA in SC70-5 - making it the only option balancing sub-microsecond response with true micropower consumption for portable threshold detection.

Availability

MAX9075EXK+T is available at Aetrix Electronics and suitable for battery-powered systems, IR receivers, keyless entry systems, and digital line receivers requiring stable component supply, RoHS-compliant packaging, and long-term industrial temperature support (–40°C to +85°C).

Supply support for MAX9075EXK+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX9075/MAX9077 family was designed specifically for ultra-low-power, space-constrained portable electronics - delivering precision comparison performance in the smallest possible footprint without sacrificing speed or input flexibility.

FAQ

What is the operating temperature range for the MAX9075EXK+T?

The MAX9075EXK+T is rated for industrial operation from –40°C to +85°C. This range is fully guaranteed per the datasheet's Electrical Characteristics table, with parameters like propagation delay, supply current, and input offset voltage tested and specified across the full span. The device uses BiCMOS process technology to maintain stability in this range, and its SC70-5 package has been qualified for thermal cycling within these limits. All production units undergo 100% testing at +25°C, with design validation covering the extremes.

Does the MAX9075EXK+T require external hysteresis for noise immunity?

The MAX9075EXK+T does not include internal hysteresis, but its architecture supports easy external implementation using three resistors and positive feedback - as detailed in Figure 1 of the datasheet. Because the device lacks a differential input clamp, adding hysteresis does not risk damaging the inputs. Typical hysteresis values (e.g., 50mV) can be set while maintaining accuracy, and the 3µA supply current ensures minimal added power penalty. For low-noise environments, the MAX9075EXK+T operates reliably without hysteresis due to its 70µV peak-to-peak input noise floor.

Can the MAX9075EXK+T interface directly with 1.8V logic?

Yes - the MAX9075EXK+T supports rail-to-rail output swing and can operate from a 2.1V supply, making it compatible with 1.8V logic families when powered from ≥2.1V. Its VOH is V_CC – 0.4V (min) and VOL is 0.4V (max) at 2mA load, so at V_CC = 2.1V, outputs swing from ~0.4V to ~1.7V - sufficient to meet 1.8V CMOS VIH/VIL thresholds with margin. However, for guaranteed 1.8V logic compatibility, V_CC should be set to 2.5V or higher to ensure VOH ≥ 2.0V. The MAX9075EXK+T input common-mode range also accommodates 1.8V reference signals when V_CC ≥ 2.1V.

What is the maximum capacitive load the MAX9075EXK+T output can drive?

The MAX9075EXK+T output is characterized up to 10pF load capacitance in the datasheet's propagation delay vs. load capacitance plot (Figure MAX9075 toc13), showing tPD increasing from 580ns to ~1.4µs at 2000pF. While not explicitly rated for heavy capacitive loads, its large push-pull drivers allow stable operation with ≤100pF without significant degradation. For loads >100pF, propagation delay increases and rise/fall times slow - e.g., at 1000pF, tPD exceeds 2µs. To drive heavier loads, add a small series resistor (e.g., 10Ω) near the output to dampen ringing, or buffer with a dedicated driver. The MAX9075EXK+T itself remains functional but timing margins must be re-evaluated.

Is the MAX9075EXK+T pin-compatible with other comparators in the MAX90xx family?

No - the MAX9075EXK+T is not pin-compatible with other MAX90xx comparators. It uses a 5-pin SC70 package with pinout GND/IN−/IN+/OUT/V_CC. In contrast, the dual MAX9077 uses an 8-pin SOT23 (or µMAX/SO) with different pin assignments, and the MAX9060EXK+T shares the same SC70-5 package and pinout but is a distinct product with different internal compensation and timing behavior. While the physical footprint matches other SC70-5 comparators (e.g., TLV3691IDCKR), electrical characteristics and pin functions are not interchangeable without circuit review. Always verify pin mapping and timing against the specific device's datasheet before substitution.