Analog Devices Inc./Maxim Integrated MAX961EUA+

Overview

The MAX961EUA+ from Maxim Integrated is a single ultra-high-speed comparator with internal hysteresis, complementary TTL/CMOS outputs, latch-enable functionality, and shutdown mode-designed for +3V/+5V single-supply operation. It delivers 4.5ns propagation delay (5mV overdrive), ±3.5mV input-referred hysteresis, and rail-to-rail input voltage range extending 100mV beyond both rails. Used in GPS receivers, high-speed sampling circuits, and threshold discriminators where fast, clean switching is critical.

For engineers reviewing the MAX961EUA+ datasheet, MAX961EUA+ pinout, MAX961EUA+ application, or MAX961EUA+ equivalent, key selection considerations include latch-enable timing (tSU/tH = 5ns), shutdown current (270µA), output drive capability (±4mA to within 0.52V of rails), and guaranteed operation across –40°C to +85°C.

Technical Context

The MAX961EUA+ employs a current-driven output stage enabling rapid slew rates and low static power consumption after transition. Its internal 3.5mV hysteresis eliminates external feedback resistors while preventing oscillation near trip points in noisy or slow-moving signal environments.

It integrates a high-impedance latch-enable (LE) input that controls transparent/latched output behavior, with precise timing constraints (5ns setup/hold, 10ns latch propagation). Shutdown is controlled via a high-impedance SHDN pin, reducing supply current to 270µA per comparator while placing outputs in high-Z state.

Key Specifications

Pinout & Package

The MAX961EUA+ is housed in an 8-pin µMAX® package (pin-compatible with SO-8 but 50% smaller footprint), RoHS-compliant, with exposed pad for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed comparator applications.

Compared with LMH7220MK/NOPB and ADCMP600BRMZ, the MAX961EUA+ uniquely integrates latch-enable, shutdown, and 3.5mV hysteresis in an 8-pin µMAX package-reducing BOM count and PCB area while enabling synchronized, low-power threshold capture in portable and GPS systems.

Availability

The MAX961EUA+ is available at Aetrix Electronics and suitable for GPS receivers, high-speed sampling circuits, and portable threshold discriminators requiring stable component supply across industrial temperature ranges.

Supply support for MAX961EUA+ 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 precision analog, mixed-signal, and high-speed interface ICs for industrial, communications, and consumer applications.

The MAX961EUA+ belongs to Maxim's ultra-high-speed comparator family designed specifically for single-supply, low-power, noise-immune threshold detection in portable, GPS, and test equipment systems.

FAQ

What is the operating temperature range for the MAX961EUA+?

The MAX961EUA+ is specified for operation from –40°C to +85°C (E grade). This range is fully guaranteed for all electrical parameters including propagation delay, input offset voltage, and hysteresis. The device undergoes 100% production testing at +25°C, with full temperature specs ensured by design characterization across the entire range.

Does the MAX961EUA+ require external hysteresis resistors?

No, the MAX961EUA+ includes 3.5mV of internal input-referred hysteresis, eliminating the need for external feedback resistors. This fixed hysteresis prevents oscillation near trip points in noisy environments and simplifies PCB layout. External hysteresis is neither required nor recommended unless a different hysteresis width is needed - in which case the internal hysteresis must be disabled per application notes.

How does the latch-enable function work on the MAX961EUA+?

The LE pin on the MAX961EUA+ controls output latching: when LE is low, the comparator operates transparently (output follows input instantly); when LE is high, the current output state is held regardless of subsequent input changes. Timing requirements include 5ns setup and hold times relative to LE transitions, and 10ns latch propagation delay - all guaranteed over temperature and supply voltage.

What is the output drive capability of the MAX961EUA+?

The MAX961EUA+ outputs can sink or source up to 4mA while maintaining VOH ≥ VCC − 0.52V and VOL ≤ 0.52V. This rail-swing capability allows direct interfacing with TTL and CMOS logic without pull-up resistors. Output capacitance is 4pF, and capacitive slew current reaches 60mA at VCC = 2.7V, supporting fast edge rates into moderate loads.

Can the MAX961EUA+ operate from a 3.3V supply?

Yes, the MAX961EUA+ is fully specified for operation from +2.7V to +5.5V, including standard 3.3V supplies. At VCC = 3.3V, propagation delay remains ≤7.0ns (typical 4.5ns), supply current is ~6.5mA, and output swing is guaranteed to within 0.52V of rails. Input common-mode range extends from –0.1V to +3.4V, accommodating most 3.3V sensor and amplifier outputs.