Analog Devices Inc./Maxim Integrated MAX968EUA+

Overview

The MAX968EUA+ from Maxim Integrated is a dual micropower comparator with rail-to-rail inputs/outputs, programmable hysteresis, and an integrated 1.235V ±1.5% reference. It operates from +1.6V to +5.5V single supply, draws ≤16µA total quiescent current (8µA per comparator), and features open-drain outputs capable of sinking beyond VCC up to 6V. It is designed for ultra-low-voltage 2-cell battery-powered systems requiring precise threshold detection with noise immunity.

For engineers reviewing the MAX968EUA+ datasheet, MAX968EUA+ pinout, MAX968EUA+ application, or MAX968EUA+ equivalent, key selection criteria include its dual-channel window-comparator configuration, internal reference accuracy over temperature, hysteresis programmability via HYST pin, and µMAX-8 package compatibility with space-constrained portable designs.

Technical Context

The MAX968EUA+ implements a dual-window comparator architecture where both comparators share a common hysteresis control input (HYST) and reference output (REF). Its rail-to-rail input common-mode range extends from –0.25V to VCC – 0.25V across –40°C to +85°C, enabling operation near ground and supply rails in low-voltage systems.

It uses a bandgap-based 1.235V reference with ±1.5% tolerance over 0°C to +85°C and ±2.5% over –40°C to +85°C, sourcing up to 50µA. Propagation delay is 10µs (50mV overdrive) with <6.0mV input offset voltage (µMAX package, –40°C to +85°C) and 7.0pF input capacitance.

Key Specifications

Pinout & Package

The MAX968EUA+ is housed in an 8-pin µMAX® package (U8-1), measuring 3.0mm × 3.0mm × 1.1mm, with exposed pad for thermal enhancement and RoHS-compliant lead-free finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3702IDR and LMV7235M5X, the MAX968EUA+ delivers superior integration (reference + hysteresis control), lower total quiescent current (16µA vs. ≥110µA), and guaranteed operation down to +1.6V - making it optimal for compact, battery-sensitive window-detection systems.

Availability

MAX968EUA+ is available at Aetrix Electronics and suitable for battery voltage monitoring, sensor window detection, and low-voltage level translation requiring stable component supply across industrial and portable electronics programs.

Supply support for MAX968EUA+ 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, automotive, and consumer markets.

The MAX965–MAX970 family was developed specifically for ultra-low-power, single-supply comparator applications in space- and energy-constrained portable systems - emphasizing rail-to-rail operation, internal reference integration, and programmable hysteresis.

FAQ

What is the maximum supply voltage the MAX968EUA+ can tolerate?

The MAX968EUA+ has an absolute maximum supply voltage (VCC) rating of +6V. However, its specified operating range is +1.6V to +5.5V. Operation above +5.5V may cause permanent damage or parametric degradation. For reliable long-term performance, maintain VCC within the 1.6V–5.5V range as defined in the Electrical Characteristics table. The MAX968EUA+ must never be subjected to sustained voltages exceeding +6V on VCC, REF, or HYST pins.

Does the MAX968EUA+ require external hysteresis components for stable operation?

No, the MAX968EUA+ includes internal hysteresis and can operate stably without external components when HYST is connected directly to REF. External resistors are only needed if programmable hysteresis (±1mV to ±50mV) is required. In that case, R1 connects REF to HYST and R2 connects HYST to GND. The MAX968EUA+'s internal structure ensures oscillation-free operation even at low overdrive conditions when HYST = REF.

Can the MAX968EUA+ be used in a single-supply 1.8V system?

Yes, the MAX968EUA+ is fully specified for single-supply operation down to +1.6V, making it compatible with 1.8V systems. At 1.8V, it maintains rail-to-rail input common-mode range (–0.25V to 1.55V), 10µs propagation delay (50mV overdrive), and ≤16µA total supply current. Input offset voltage remains ≤6.0mV and reference accuracy holds at ±1.5% (0°C to +85°C), ensuring robust performance in low-voltage IoT and wearable applications.

What is the function of the HYST pin on the MAX968EUA+?

The HYST pin on the MAX968EUA+ controls hysteresis magnitude for both comparators. When connected to REF, it enables fixed internal hysteresis (~±1mV). When biased via external resistors between REF and GND, it programs hysteresis from ±1mV to ±50mV. This pin allows noise-immune threshold detection without external positive-feedback networks. The HYST input voltage range is VREF to (VREF – 50mV), and leakage is ±10nA - critical for accurate hysteresis calculation in precision applications.

Is the MAX968EUA+ pin-compatible with other devices in the MAX965–MAX970 family?

No, the MAX968EUA+ is not pin-compatible with other members of the MAX965–MAX970 family. While it shares the 8-pin µMAX package with MAX965/MAX966/MAX967, its pinout differs: MAX968EUA+ assigns Pin 3 to INB+, Pin 4 to INB–, and Pin 5 to INA–, whereas MAX967 uses Pin 3 for REF and Pin 4 for HYST. Substituting without PCB revision will result in incorrect functionality. Always verify pin mapping against the MAX968EUA+ specific Pin Configuration diagram before design reuse.