Analog Devices Inc./Maxim Integrated MAX920EUK

Overview

MAX920EUK from Maxim Integrated is a nanopower, open-drain output comparator in SOT23-5 package, guaranteed to operate from +1.8V to +5.5V supply, with 380nA typical supply current, Beyond-the-Rails™ input range (VEE − 0.2V to VCC + 0.2V), and 4mV internal hysteresis - designed for ultra-low-power 2-cell battery monitoring and threshold detection in portable medical instruments.

For engineers reviewing the MAX920EUK datasheet, MAX920EUK pinout, MAX920EUK application, or MAX920EUK equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the MAX920EUK+T variant.

Technical Context

The MAX920EUK implements a rail-to-rail input stage with ±0.15nA typical input bias current and 1mV typical input offset voltage over −40°C to +85°C, enabling accurate sensing at ground or supply lines. Its open-drain output supports mixed-voltage logic translation up to 6V absolute maximum on the pull-up side, with 0.001µA typical leakage current and 95mA short-circuit sink capability.

Unlike push-pull comparators, the MAX920EUK avoids crowbar-current surges during switching - supply current remains stable across dynamic operation, eliminating supply glitches and reducing need for large bypass capacitors. Propagation delay is 35µs (typ) at VCC = 5V with 100kΩ pull-up, and 120µs (typ) at VCC = 1.8V under same conditions.

Key Specifications

Pinout & Package

SOT23-5 package (U5+1 code), RoHS-compliant, 5-pin surface-mount with exposed pad not electrically connected. Dimensions: 2.9mm × 1.6mm × 1.1mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3691IDBVR, MAX920EUK delivers integrated hysteresis and proven reliability in battery-critical systems; compared with MAX920EUK+T, the base MAX920EUK lacks reel packaging documentation and may require manual handling verification for automated assembly.

Availability

MAX920EUK is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry systems, and portable medical instrumentation requiring stable component supply across extended product lifecycles.

Supply support for MAX920EUK 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 power, sensing, and interface applications in industrial, medical, and portable electronics.

The MAX917–MAX920 family was engineered specifically for nanopower battery monitoring - prioritizing sub-1µA operation, rail-exceeding inputs, and glitch-free switching in space-constrained, long-life systems.

FAQ

What is the maximum allowable voltage on the MAX920EUK output pin?

The MAX920EUK output pin is open-drain and rated for up to +6V absolute maximum when pulled up externally. This allows safe interfacing with higher-voltage logic domains (e.g., 5V MCU driving 3V peripheral) without clamping diodes or level shifters. The specification is confirmed in the Absolute Maximum Ratings table of the official MAX917–MAX920 datasheet Rev 2, page 2.

Does the MAX920EUK include an internal voltage reference?

No, the MAX920EUK does not include an internal voltage reference. It belongs to the reference-less variant of the MAX917–MAX920 family (alongside MAX919). Only MAX917 and MAX918 integrate a 1.245V ±1.5% reference. The MAX920EUK relies on external reference or resistor-divider inputs for threshold setting, enabling greater flexibility in multi-threshold designs.

What is the typical propagation delay of the MAX920EUK at 1.8V supply?

The typical propagation delay of the MAX920EUK is 120µs at VCC = 1.8V with a 100kΩ pull-up resistor, as specified in the ELECTRICAL CHARACTERISTICS-MAX919/MAX920 table (page 3 of datasheet Rev 2). This value applies to both tPD+ and tPD− under standard test conditions (CL = 15pF, VOVERDRIVE = 100mV).

Can the MAX920EUK operate with inputs below ground?

Yes, the MAX920EUK supports input voltages as low as VEE − 0.2V. With VEE tied to ground (0V), this allows valid operation down to −0.2V on either input - enabling ground-referenced zero-crossing detection or negative signal monitoring in single-supply systems. This Beyond-the-Rails™ capability is explicitly guaranteed across the full −40°C to +85°C temperature range.

Is the MAX920EUK pin-compatible with other devices in the MAX917–MAX920 family?

Yes, the MAX920EUK shares identical SOT23-5 pinout and footprint with MAX917EUK, MAX918EUK, and MAX919EUK. All four variants use pins 1 (VEE), 2 (IN−), 3 (IN+), 4 (VCC), and 5 (OUT) with identical functions - enabling drop-in replacement where open-drain output and absence of internal reference are acceptable.