Analog Devices Inc./Maxim Integrated MAX967EUA

Overview

The MAX967EUA from Maxim Integrated is a dual micropower comparator with rail-to-rail inputs/outputs, 1.235V ±1.5% internal reference, programmable hysteresis, and 8-pin µMAX package. It operates from +1.6V to +5.5V single supply, draws ≤16µA total quiescent current (≤8µA per comparator), and supports open-drain outputs pulled beyond VCC up to +6V. It is used in battery-powered voltage monitors and window comparators requiring ultra-low-voltage precision.

For engineers reviewing the MAX967EUA datasheet, MAX967EUA pinout, MAX967EUA application, or MAX967EUA equivalent, key selection factors include its dual-comparator architecture with shared hysteresis control, guaranteed reference accuracy over –40°C to +85°C, rail-to-rail input common-mode range down to –0.25V, and compatibility with 2-cell alkaline/NiMH systems.

Technical Context

The MAX967EUA integrates two independent comparators sharing a single HYST pin for synchronized hysteresis programming and a buffered 1.235V bandgap reference output. Its input stage supports –0.25V to (VCC – 0.25V) common-mode range across the full temperature range, enabling reliable operation near ground or supply rails.

Each comparator features open-drain output capable of sinking ≥10mA at VCC = 2V (TA = +25°C), propagation delay of 10µs (50mV overdrive), and input offset voltage ≤6.0mV over –40°C to +85°C in µMAX package. The reference delivers 15–50µA source current with <10µVRMS noise when bypassed with 0.1µF.

Key Specifications

Pinout & Package

The MAX967EUA is housed in an 8-pin µMAX® package (U8-1), 3mm × 3mm, 0.8mm height, exposed pad, RoHS-compliant. Pin pitch is 0.65mm; recommended PCB footprint matches Maxim's U8-1 land pattern.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3702IDR and MAX966EUA-T, the MAX967EUA uniquely integrates reference and hysteresis control in a dual-comparator µMAX package, reducing component count and PCB area for self-contained voltage monitoring - critical in space-constrained portable designs.

Availability

MAX967EUA is available at Aetrix Electronics and suitable for battery voltage monitoring, window comparator circuits, and voltage-level translation requiring stable component supply across industrial temperature ranges and long-lifecycle programs.

Supply support for MAX967EUA 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 systems.

The MAX965–MAX970 family targets ultra-low-voltage, micropower comparator applications - specifically engineered for 2-cell battery systems where supply headroom is minimal and reference stability is essential.

FAQ

What is the minimum operating supply voltage for the MAX967EUA?

The MAX967EUA is fully specified from +1.6V to +5.5V. While it may function down to +1.0V, performance degrades: reference output becomes unstable below +1.5V, input common-mode range remains rail-to-rail, but output sink capability drops and propagation delay increases. For guaranteed operation, maintain VCC ≥ +1.6V. The MAX967EUA datasheet specifies electrical characteristics only within the +1.6V to +5.5V range.

Does the MAX967EUA require external hysteresis resistors to operate?

No, the MAX967EUA does not require external hysteresis resistors to operate. When the HYST pin is connected directly to the REF pin, the device provides built-in hysteresis of approximately ±1mV. External resistors are only needed to program hysteresis beyond that baseline - up to ±50mV - using the HYST pin configuration described in the MAX967EUA datasheet.

Can the MAX967EUA's internal reference drive an external ADC reference input?

The MAX967EUA's REF pin is rated to source up to 50µA with ±1.5% accuracy over 0°C to +85°C. It can drive high-impedance ADC reference inputs (e.g., SAR ADCs with >1MΩ input impedance), but not low-impedance or high-capacitance loads. For ADCs requiring >50µA or low-noise performance, buffer the REF output with a rail-to-rail op-amp or use a dedicated reference IC. The MAX967EUA itself is not designed as a primary ADC reference source.

How does the MAX967EUA handle input voltages below ground?

The MAX967EUA supports an input common-mode voltage range extending to –0.25V relative to GND. Inputs below –0.25V are outside absolute maximum ratings and may cause latch-up or permanent damage. For applications requiring sub-ground sensing (e.g., current shunt monitoring), use external level-shifting or clamping circuitry to keep INA− and INA+ within –0.25V to (VCC – 0.25V). The MAX967EUA is not designed for true negative-input operation.

Is the MAX967EUA pin-compatible with other devices in the MAX965–MAX970 family?

The MAX967EUA is pin-compatible with MAX965EUA-T and MAX966EUA-T in the 8-pin µMAX package (U8-1), sharing identical pinout for VCC, GND, REF, HYST, OUTA, OUTB, INA+, INA−, and N.C. However, MAX965 has only one comparator and uses pin 1 for OUT, while MAX966 lacks REF and HYST pins (pins 6 and 7 are N.C.). Thus, direct replacement is possible only with functional verification - MAX967EUA cannot substitute for MAX965EUA-T without redesigning hysteresis and reference routing.