Analog Devices Inc./Maxim Integrated MAX9065EUK+

Overview

The MAX9065EUK+ from Maxim Integrated is a 5-pin SOT23 ultra-small, nanoPower window comparator designed for lithium-ion battery voltage monitoring in space-constrained portable electronics. It features 3.0V and 4.2V precise thresholds, 1μA max supply current, -0.3V to +5.5V input common-mode range, and operates from 1.0V to 5.5V over -40°C to +85°C.

For engineers reviewing the MAX9065EUK+ datasheet, MAX9065EUK+ pinout, MAX9065EUK+ application, or MAX9065EUK+ equivalent, this device serves as a low-quiescent, push-pull output window detector optimized for battery protection circuits where board area and power budget are critical constraints.

Technical Context

The MAX9065EUK+ integrates two precision comparators, an internal 200mV reference, and a resistor-divider network with disconnect switch to generate upper (4.2V) and lower (3.0V) trip points. Its digital logic implements AND-gated output behavior: high only when input lies strictly between thresholds.

It uses BiCMOS process technology, supports rail-to-rail input operation independent of VCC, and achieves zero input current during shutdown (VCC = 0). Propagation delay is 25µs typical with ±100mV overdrive, and hysteresis is fixed at ±1% of threshold voltage.

Key Specifications

Pinout & Package

MAX9065EUK+ is housed in a RoHS-compliant 5-pin SOT23 package (outline 21-0057), footprint compatible with standard SOT23 land pattern 90-0174. Dimensions: 2.9mm × 1.6mm × 1.1mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV7032IDR and MAX9063EUK+, the MAX9065EUK+ delivers factory-trimmed 3.0V/4.2V thresholds in a fully integrated, no-external-component solution-reducing PCB area by >30% and eliminating resistor tolerance drift concerns in Li-ion protection.

Availability

MAX9065EUK+ is available at Aetrix Electronics and suitable for lithium-ion battery protection, portable medical device monitoring, and notebook computer power management requiring stable component supply across long production lifecycles.

Supply support for MAX9065EUK+ 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 demanding industrial, automotive, and portable applications.

The MAX9065EUK+ belongs to Maxim's nanoPower window comparator product line, engineered specifically for autonomous, long-life battery voltage supervision in ultra-compact consumer electronics.

FAQ

What is the exact threshold voltage accuracy of the MAX9065EUK+ over temperature?

The MAX9065EUK+ has upper threshold voltage (UTV) of 4.20V with ±0.22V min/max variation across –40°C to +85°C, and lower threshold voltage (LTV) of 3.00V with ±0.17V variation over the same range. These values are guaranteed by production testing and reflect total error including initial trim, temperature drift, and supply rejection.

Does the MAX9065EUK+ require external components to function as a window comparator?

No, the MAX9065EUK+ is fully self-contained: it integrates precision resistor dividers, a 200mV internal reference, dual comparators, and digital logic. Only a 0.1µF VCC bypass capacitor is required. No external resistors, references, or hysteresis networks are needed for basic 3.0V/4.2V window detection.

Can the MAX9065EUK+ operate from a 1.0V supply while maintaining specified performance?

Yes, the MAX9065EUK+ is fully specified down to 1.0V supply voltage. At VCC = 1.0V and TA = +25°C, supply current is 0.6–1.0μA, output low voltage is ≤0.2V at 100µA sink, and propagation delay remains within datasheet limits - enabling use with single alkaline or low-voltage Li-ion cells.

How does the MAX9065EUK+ behave when VCC is disconnected or pulled to 0V?

When VCC = 0V, the MAX9065EUK+ enters true shutdown: the internal n-channel FET disconnects the resistor divider, reducing input current to ≤15nA (typical 1nA). The output goes high-impedance, and no current flows into or out of the IN pin - providing complete isolation for battery-backed systems.

Is the MAX9065EUK+ pin-compatible with other devices in the MAX906x family?

The MAX9065EUK+ shares the same 5-pin SOT23 pinout with MAX9063EUK+ and MAX9064EUK+, but threshold voltages differ: MAX9063EUK+ uses 1.2V/0.6V, MAX9064EUK+ uses 2.5V/1.5V. Electrical compatibility requires verification of threshold alignment; physical pinout alone does not guarantee functional interchangeability.