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 single supply, draws ≤12µA (typ) quiescent current, features open-drain output capable of sinking beyond VCC up to +6V, and is specified for -40°C to +85°C. It enables ultra-low-voltage threshold detection in space-constrained 2-cell battery systems.

For engineers reviewing the MAX965EUA datasheet, MAX965EUA pinout, MAX965EUA application, or MAX965EUA equivalent, key selection criteria include its 1.6V minimum supply voltage, 10µs propagation delay (50mV overdrive), ±1mV to ±50mV programmable hysteresis range, rail-to-rail input common-mode range (-0.25V to VCC), and 8-pin µMAX package compatibility with high-density portable designs.

Technical Context

The MAX965EUA implements a low-voltage, rail-to-rail input stage optimized for operation down to 1.6V, with input bias current as low as ±5nA and input offset voltage of 4.0mV (max, -40°C to +85°C, µMAX package). Its internal bandgap reference delivers 1.235V ±1.5% accuracy over 0°C to +85°C and ±2.5% over -40°C to +85°C, sourcing up to 50µA.

The device uses a slew-rate-controlled open-drain output stage that minimizes switching current during transitions while enabling voltage-level translation via external pull-up. Hysteresis is programmable via the HYST pin using two resistors referenced to the internal REF, supporting precise window or threshold detection without external components.

Key Specifications

Pinout & Package

The MAX965EUA is housed in an 8-pin µMAX® package (U8-1), measuring 3.0mm × 3.0mm × 0.8mm, 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 comparator applications.

Compared with TLV3691IDBVR and MAX9060ASA+, the MAX965EUA uniquely combines programmable hysteresis, integrated ±1.5% reference, and sub-12µA operation in an 8-pin µMAX package - making it optimal for compact, battery-sensitive designs demanding configurable noise immunity and self-contained threshold generation.

Availability

MAX965EUA is available at Aetrix Electronics and suitable for 2-cell battery monitoring, low-voltage threshold detection, voltage-level translation, and IR receiver front-end applications requiring stable component supply and long-lifecycle support.

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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX965EUA belongs to the MAX965–MAX970 family of micropower comparators designed specifically for ultra-low-voltage, rail-to-rail operation in portable and energy-constrained systems.

FAQ

What is the minimum operating supply voltage for the MAX965EUA?

The MAX965EUA is fully specified down to +1.6V supply voltage. While comparator functionality may persist down to +1.0V, reference accuracy degrades below +1.6V and propagation delay increases significantly. For guaranteed performance across -40°C to +85°C, maintain VCC ≥ +1.6V. The MAX965EUA datasheet specifies 1.6V as the lower limit of the guaranteed operating range.

Does the MAX965EUA require external components to use its internal reference?

Yes - the MAX965EUA's internal 1.235V reference (pin 3, REF) requires a 0.1µF ceramic bypass capacitor connected between REF and GND to minimize noise and ensure stability. Without this capacitor, reference output noise increases significantly, degrading comparator accuracy. The MAX965EUA reference is not internally bypassed and relies on this external component for optimal performance.

Can the MAX965EUA drive a standard 5V logic input directly?

Yes - the MAX965EUA's open-drain output (pin 1, OUT) is rated to sink current with voltage tolerance up to +6V relative to GND. When pulled up to +5V via an external resistor, the MAX965EUA delivers a valid TTL/CMOS logic-high signal. This eliminates need for additional level-shifting circuitry when interfacing with 5V systems.

How is hysteresis programmed on the MAX965EUA?

Hysteresis on the MAX965EUA is programmed by connecting two external resistors: R1 between REF and HYST (pin 4), and R2 between HYST and GND. This creates a voltage divider that sets the hysteresis band (VHB ≈ 2 × |V_HYST − V_REF|), adjustable from ±1mV to ±50mV. If no hysteresis is needed, connect HYST directly to REF. The MAX965EUA HYST pin enables precise, resistor-based tuning without altering the main signal path.

What is the maximum sink current capability of the MAX965EUA output?

The MAX965EUA output can continuously sink up to 10mA (per Absolute Maximum Ratings), but functional performance is specified at 100µA (VOL = 0.2V) and 500µA (VOL = 0.4V). For reliable logic-level translation, keep sink current ≤500µA. Higher loads increase VOL and propagation delay; the MAX965EUA output stage is optimized for low-current, high-impedance interfaces rather than driving heavy capacitive or resistive loads directly.