Analog Devices Inc./Maxim Integrated MAX919EUK/V+T

Overview

MAX919EUK/V+T from Maxim Integrated is a nanopower, push-pull output comparator in SOT23-5 package, designed for ultra-low-power 2-cell battery monitoring. It operates from +1.8V to +5.5V, draws only 380nA supply current, features Beyond-the-Rails™ inputs (VEE − 0.2V to VCC + 0.2V), and delivers rail-to-rail CMOS output swing with ±8mA drive capability - enabling precise threshold detection in portable medical instruments and telemetry systems.

For engineers reviewing the MAX919EUK/V+T datasheet, MAX919EUK/V+T pinout, MAX919EUK/V+T application, or MAX919EUK/V+T equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed automotive-grade qualification, and two rigorously cross-checked alternative comparators for low-voltage, low-quiescent-current system design.

Technical Context

The MAX919EUK/V+T implements a break-before-make push-pull output stage that eliminates crowbar current during switching, minimizing supply glitches and dynamic power surges - critical for battery lifetime in always-on sensing nodes. Its input stage supports common-mode voltages beyond supply rails by ±200mV, enabling direct ground- or supply-line sensing without level-shifting.

Unlike reference-equipped variants (MAX917/MAX918), the MAX919EUK/V+T omits the internal 1.245V reference, reducing quiescent current to 380nA while retaining identical input architecture, hysteresis (4mV typ), and temperature range (−40°C to +85°C). The /V suffix confirms AEC-Q100 Grade 2 automotive qualification.

Key Specifications

Pinout & Package

SOT23-5 package (U5+1 code), RoHS-compliant, thermally enhanced plastic surface-mount outline with 1.3mm × 2.3mm footprint and 0.95mm height - optimized for space-constrained PCB layouts in wearables and automotive sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3691IDBVR and MAX40002ANSR, the MAX919EUK/V+T uniquely combines automotive qualification, push-pull drive, and 380nA IQ - making it the only choice for space-constrained, safety-critical automotive and medical battery-monitoring nodes requiring zero external components for basic threshold detection.

Availability

MAX919EUK/V+T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, ultra-low-power telemetry, and automotive cabin sensor applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.

Supply support for MAX919EUK/V+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 and mixed-signal ICs for power, sensing, and connectivity in demanding industrial, automotive, and medical systems.

The MAX917–MAX920 family was engineered specifically for nanopower battery monitoring and threshold detection in space-constrained, long-life applications - prioritizing sub-1µA IQ, rail-to-rail operation, and robust input architecture over speed or integration.

FAQ

What is the key differentiator of MAX919EUK/V+T versus MAX917EUK+T?

The MAX919EUK/V+T omits the internal 1.245V reference to achieve 380nA supply current - 49% lower than the 750nA of the MAX917EUK+T - while retaining identical push-pull output, Beyond-the-Rails™ inputs, and hysteresis. The /V suffix also confirms AEC-Q100 Grade 2 qualification, which MAX917EUK+T lacks. Both share the same SOT23-5 package and pinout.

Does MAX919EUK/V+T require an external reference for threshold detection?

No. The MAX919EUK/V+T does not include an internal reference and requires an external reference voltage applied to IN− (pin 2) or generated via resistor divider. This design reduces quiescent current and increases flexibility - allowing users to set custom thresholds from 0V to VCC, unlike the fixed 1.245V reference in MAX917/MAX918 variants.

Can MAX919EUK/V+T operate reliably at 1.8V supply with full specifications?

Yes. The MAX919EUK/V+T is fully specified and guaranteed over 1.8V to 5.5V. At VCC = 1.8V, it maintains 380nA supply current, 4mV hysteresis, and rail-to-rail output swing (VOL < 400mV at 1mA sink), enabling direct interface with emerging 1.8V microcontrollers and energy-harvesting PMICs.

What does the "/V" in MAX919EUK/V+T signify?

The "/V" suffix denotes AEC-Q100 Grade 2 qualification - confirming the MAX919EUK/V+T has passed stress tests for automotive applications including temperature cycling (−40°C to +105°C junction), humidity bias HAST, and mechanical shock. It is rated for operation from −40°C to +85°C ambient, with full parametric guarantees across that range.

How does the crowbar-current-free output stage benefit system design?

The MAX919EUK/V+T's break-before-make output stage prevents simultaneous conduction of high-side and low-side drivers during transitions - eliminating supply current spikes that cause voltage droop and noise coupling. This removes the need for large local bypass capacitors, simplifies power integrity, and improves reliability in mixed-signal systems sharing supply rails with ADCs or RF transceivers.