Analog Devices Inc./Maxim Integrated MAX965EUA+

Overview

The MAX965EUA+ from Maxim Integrated is a single, micropower, rail-to-rail input/output comparator with integrated 1.235V ±1.5% reference and programmable hysteresis. It operates from +1.6V to +5.5V, draws only 7–12 µA supply current, features open-drain output capable of sinking beyond VCC up to +6V, and supports ultra-low-voltage 2-cell battery systems. It is used in precision threshold detection and voltage-level translation where low quiescent power and internal reference stability are critical.

For engineers reviewing the MAX965EUA+ datasheet, MAX965EUA+ pinout, MAX965EUA+ application, or MAX965EUA+ equivalent, this page delivers verified specifications, package mapping, functional context for rail-to-rail I/O operation at 1.6V, confirmed hysteresis programming capability via HYST pin, and validated alternatives for single-comparator, reference-integrated designs in space-constrained portable systems.

Technical Context

The MAX965EUA+ implements a micropower comparator core with rail-to-rail input common-mode range (−0.25V to VCC) and open-drain output stage slew-rate controlled to minimize switching current. Its internal 1.235V bandgap reference is specified over −40°C to +85°C with ±2.5% accuracy and can source up to 50 µA.

Hysteresis is programmable from ±1 mV to ±50 mV using external resistors between REF and HYST pins; the HYST input voltage range is strictly bounded from (VREF − 50 mV) to VREF. Input offset voltage is 4.0 mV (max, −40°C to +85°C, µMAX package), and propagation delay is 10 µs (50 mV overdrive, typical).

Key Specifications

Pinout & Package

The MAX965EUA+ 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 single-comparator-with-reference applications.

Compared with TLV3691IDBVR and MAX9060AXK+T, the MAX965EUA+ uniquely combines programmable hysteresis, ±2.5% reference accuracy over full temperature range, and rail-to-rail operation down to 1.6V - making it optimal for precision, low-voltage threshold detection where design simplicity and guaranteed trip-point stability are critical.

Availability

The MAX965EUA+ is available at Aetrix Electronics and suitable for battery voltage monitoring, window comparators, voltage-level translation, IR receiver front-ends, and ground/supply-sensing applications requiring stable component supply and long-term industrial availability.

Supply support for MAX965EUA+ 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 industrial, medical, communications, and consumer applications.

The MAX965EUA+ belongs to the MAX965–MAX970 family of micropower comparators engineered specifically for ultra-low-voltage, rail-to-rail operation in portable and energy-constrained systems - emphasizing single-supply compatibility, internal reference integration, and programmable noise immunity.

FAQ

What is the maximum supply voltage the MAX965EUA+ can tolerate?

The MAX965EUA+ has an absolute maximum supply voltage (VCC) rating of +6V. Operation above +5.5V is not recommended for functional use, but transient exposure up to +6V is tolerated without damage. The device is fully specified for reliable operation from +1.6V to +5.5V, making it ideal for 2-cell battery systems where voltage can peak near 3.4V fresh and decay to ~1.8V under load. Exceeding +6V risks permanent damage per Absolute Maximum Ratings.

Does the MAX965EUA+ require an external reference, or is one built in?

The MAX965EUA+ includes a built-in 1.235V ±2.5% precision bandgap reference accessible at the REF pin. This eliminates the need for external reference ICs or resistor dividers in most threshold-detection applications. The reference can source up to 50 µA and must be bypassed with a 0.1 µF capacitor to maintain low noise. No external reference is required unless tighter initial accuracy or lower drift is needed beyond the MAX965EUA+'s specification.

Can the MAX965EUA+ operate below 1.6V, and what happens to performance?

The MAX965EUA+ is fully specified down to +1.6V, but comparator operation may persist down to +1.0V. Below +1.6V, the internal reference degrades and typically falls out of specification below +1.5V, while input common-mode range remains rail-to-rail. Propagation delay increases and output sink capability decreases - e.g., VOL rises and tPD exceeds 20 µs. For robust design, +1.6V is the minimum recommended supply; operation below that requires validation in the target application.

How is hysteresis programmed on the MAX965EUA+?

Hysteresis on the MAX965EUA+ is programmed by connecting two external resistors between REF, HYST, and GND. With R1 from REF to HYST and R2 from HYST to GND, the hysteresis band (VHB) ≈ 2 × (VREF − VHYST). The HYST pin accepts voltages from (VREF − 50 mV) to VREF, enabling VHB tuning from ±1 mV to ±50 mV. If no hysteresis is needed, connect HYST directly to REF. This method draws minimal current and avoids external feedback loops.

What package type and footprint does the MAX965EUA+ use?

The MAX965EUA+ uses the 8-pin µMAX® package (U8-1), a 3.0mm × 3.0mm × 1.1mm surface-mount package with exposed thermal pad. It is pin-compatible with other MAX965 variants in µMAX format (e.g., MAX965ESA, MAX965EUA-T) and requires standard reflow profile for lead-free soldering. Land pattern and mechanical drawings are available from Maxim Integrated's package database under "U8-1".