Analog Devices Inc./Maxim Integrated MAX985EUK-T

Overview

MAX985EUK-T from Maxim Integrated is a micropower, low-voltage, rail-to-rail input/output comparator in SC70-5 package, operating from 2.5V to 5.5V supply, with 1.7µA quiescent current, 4.5µs propagation delay, and open-drain output - used for precision voltage monitoring in battery-powered sensor interfaces and portable medical devices.

For engineers reviewing the MAX985EUK-T datasheet, MAX985EUK-T pinout, MAX985EUK-T application, or MAX985EUK-T equivalent, key selection criteria include ultra-low supply current, rail-to-rail I/O capability, SC70-5 footprint compatibility, and open-drain output for wired-OR logic or level translation in space-constrained embedded systems.

Technical Context

The MAX985EUK-T implements a single-channel CMOS comparator core with internal hysteresis of 5mV (typ), designed for stable operation without external feedback. Its input stage supports common-mode voltage from V_SS – 0.1V to V_DD + 0.1V, enabling direct sensing across full supply rails.

Output stage uses an open-drain NMOS transistor rated for 20mA sink current, compatible with pull-up voltages up to 5.5V independent of V_DD, supporting mixed-voltage interface applications such as 3.3V logic monitoring 5V analog signals.

Key Specifications

Pinout & Package

MAX985EUK-T is housed in a 5-pin SC70 package (2.0mm × 1.25mm × 0.95mm height), optimized for high-density PCB layouts. Pin 1 is marked with dot; device is bottom-side thermal pad-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3691IDCKR and MAX9021AXK+T, the MAX985EUK-T uniquely balances ultra-low quiescent current, open-drain output, rail-to-rail inputs, and SC70-5 pin compatibility - making it optimal for space- and power-constrained threshold detection where interface flexibility matters.

Availability

MAX985EUK-T is available at Aetrix Electronics and suitable for battery voltage monitoring, medical sensor threshold detection, portable gas detector alarms, and industrial temperature trip units requiring stable component supply and long-term lifecycle support.

Supply support for MAX985EUK-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, mixed-signal, and power-management ICs for industrial, medical, and communications applications.

The MAX985EUK-T belongs to Maxim's micropower comparator product line, engineered specifically for ultra-low-power, rail-to-rail sensing in portable and energy-harvesting systems.

FAQ

What is the maximum supply voltage rating for the MAX985EUK-T?

The MAX985EUK-T supports a maximum supply voltage of 5.5V. This rating applies to both V_DD and the pull-up voltage on the open-drain output (V_PULLUP). Exceeding 5.5V on either terminal risks permanent damage. The device operates reliably across the full 2.5V to 5.5V range, making MAX985EUK-T suitable for systems powered by single Li-ion cells or regulated 3.3V/5V supplies.

Does the MAX985EUK-T require external hysteresis components?

No, the MAX985EUK-T includes internal hysteresis of 5mV (typical), which prevents output chatter near the switching threshold without requiring external resistors or feedback networks. This built-in hysteresis is factory-trimmed and remains stable over temperature and supply voltage variations. As a result, MAX985EUK-T delivers clean, glitch-free output transitions in noisy environments - ideal for direct use in battery monitor or sensor alert circuits.

Can the MAX985EUK-T interface with a 5V microcontroller while operating from a 2.5V supply?

Yes, the MAX985EUK-T's open-drain output supports pull-up voltages up to 5.5V independent of V_DD. When V_DD = 2.5V, the output can still be pulled to 5V and directly drive a 5V microcontroller's GPIO or interrupt pin. This eliminates level-shifters and reduces BOM count. The MAX985EUK-T maintains full rail-to-rail input range even at 2.5V supply, ensuring accurate signal comparison across the entire 0V–2.6V input span.

What is the typical propagation delay of the MAX985EUK-T at 3.3V supply?

The typical propagation delay of the MAX985EUK-T is 4.5µs when V_DD = 3.3V and the input overdrive is 200mV. This value is measured from 50% input transition to 50% output transition under standard load conditions (50pF, 10kΩ pull-up). While not intended for high-speed signal conditioning, this delay is well-suited for monitoring slowly varying parameters like battery voltage or temperature - a key design attribute of the MAX985EUK-T.

Is the MAX985EUK-T available in tape-and-reel packaging for automated assembly?

Yes, the MAX985EUK-T is supplied in EIA-481-compliant tape-and-reel format (3,000 units per reel), compatible with standard SMT pick-and-place equipment. The SC70-5 package features precise dimensional control and embossed carrier tape with cover tape sealing - ensuring reliable feeding and placement accuracy. Aetrix Electronics stocks MAX985EUK-T in full reels and cut-tape options to support both high-volume production and NPI prototyping requirements.