Analog Devices Inc./Maxim Integrated MAX988EXK+T

Overview

MAX988EXK+T from Maxim Integrated is a single-channel, micropower, rail-to-rail input/output comparator with open-drain output stage, operating from +2.5V to +5.5V single supply or ±1.25V to ±2.75V dual supply. It delivers 120ns propagation delay at 100mV overdrive, consumes only 48μA quiescent current per comparator, and supports common-mode input voltage 0.25V beyond rails. It is used in level translation, zero-crossing detection, and threshold sensing in portable instrumentation.

For engineers reviewing the MAX988EXK+T datasheet, MAX988EXK+T pinout, MAX988EXK+T application, or MAX988EXK+T equivalent, key selection criteria include its open-drain output capable of pulling up to 6V above VEE, rail-to-rail input range, low 1.0pA typical input bias current, and SC70-5 package compatibility with space-constrained battery-powered designs.

Technical Context

The MAX988EXK+T implements a precision analog comparator core with internal ±2.5mV hysteresis and rail-to-rail input stage extending 0.25V beyond VEE and VCC. Its open-drain output allows interface across voltage domains - e.g., 5V logic driving 3V logic via external pullup - and tolerates output voltages up to 6V above VEE.

It features a unique output switching architecture that minimizes supply-current surges during transitions, reducing power-supply glitches without requiring large decoupling capacitors. Input offset voltage is typically ±0.5mV (±7mV max over temperature), and input capacitance is 1.0pF, supporting high-speed signal integrity in low-noise sensing paths.

Key Specifications

Pinout & Package

MAX988EXK+T is housed in a 5-pin SC70-5 package (package code X5-1), measuring 2.0mm × 1.25mm × 0.9mm, optimized for ultra-compact PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3701DBVR and LMV7215M5X, the MAX988EXK+T uniquely balances ultra-low quiescent current (48μA), fast 120ns response, and true open-drain operation with 6V output tolerance - making it optimal for low-power, multi-rail sensing where supply glitch immunity and voltage-domain bridging are critical.

Availability

MAX988EXK+T is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered IoT endpoints, and industrial sensor interfaces requiring stable component supply and long-term manufacturability.

Supply support for MAX988EXK+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX987/MAX988 family was designed specifically for micropower, high-speed comparator applications in space- and energy-constrained systems - emphasizing rail-to-rail operation, low supply current, and robust input/output staging.

FAQ

What is the maximum allowable voltage on the OUT pin of the MAX988EXK+T?

The MAX988EXK+T OUT pin can tolerate up to +6V above VEE, regardless of VCC value. For example, with VEE = 0V and VCC = 3.3V, the OUT pin may be pulled to +6V. This specification enables safe interfacing with higher-voltage logic families or analog subsystems without external protection components. Always observe absolute maximum ratings in the datasheet to avoid damage.

Does the MAX988EXK+T require an external pullup resistor on the OUT pin?

Yes, the MAX988EXK+T has an open-drain output and requires an external pullup resistor to establish a defined HIGH state. The resistor value depends on rise time requirements and load capacitance; typical values range from 2.2kΩ to 10kΩ when pulling to 3V or 5V. No pullup is needed if the output drives a CMOS input with internal weak pullup or connects to another open-drain device in a wired-OR configuration.

Can the MAX988EXK+T operate from a single 2.5V supply?

Yes, the MAX988EXK+T is fully specified for operation from +2.5V to +5.5V single supply (VEE = 0V). At VCC = 2.5V, it maintains 120ns propagation delay (at 100mV overdrive), 48μA typical supply current, and rail-to-rail input range from −0.25V to +2.75V. This makes it suitable for ultra-low-voltage applications such as coin-cell-powered sensors and wearables.

What is the input bias current specification for the MAX988EXK+T, and why does it matter?

The MAX988EXK+T has a typical input bias current of 1.0pA, with a maximum of 10nA over temperature. This ultra-low value minimizes voltage error when driving high-impedance sources - such as photodiodes, thermopiles, or RC-filtered sensor outputs - where even nanoamp-level currents cause significant offset. It also reduces leakage-induced drift in precision threshold detection circuits.

How does the internal hysteresis of the MAX988EXK+T improve system reliability?

The MAX988EXK+T includes ±2.5mV internal hysteresis, which prevents output oscillation when input signals are near the decision threshold - especially with slow edges or noise. This eliminates the need for external positive-feedback resistors in most applications, simplifying design and reducing component count. It ensures clean, chatter-free switching in zero-crossing detectors, window comparators, and battery-monitoring circuits.