Analog Devices Inc./Maxim Integrated MAX963ESD

Overview

The MAX963ESD from Maxim Integrated is a dual ultra-high-speed comparator with complementary outputs, latch-enable functionality, and internal 3.5mV hysteresis-designed for single +3V/+5V operation. It features 4.5ns propagation delay (5mV overdrive), 7.2mA typical supply current per comparator at 5V, and Beyond-the-Rails™ input range extending ±100mV beyond VCC/GND. Used in GPS receivers and high-speed sampling circuits where precise timing and rail-to-rail input tolerance are critical.

For engineers reviewing the MAX963ESD datasheet, MAX963ESD pinout, MAX963ESD application, or MAX963ESD equivalent, key selection criteria include latch-enable timing (5ns setup/hold), shutdown current (270μA/comparator), output drive capability (4mA to within 0.52V of rails), and SO-14 package compatibility with space-constrained industrial signal conditioning designs.

Technical Context

The MAX963ESD implements a current-driven output stage enabling fast slew rates and TTL/CMOS-compatible logic-level outputs without external pull-ups. Its internal hysteresis eliminates need for external feedback resistors while preventing oscillation near trip points.

It integrates dual independent comparators with shared shutdown (SHDN) and separate latch-enable inputs (LEA, LEB) for asynchronous result capture. Input protection includes front-to-back diode clamps and 200Ω series resistors, allowing safe operation with differential inputs up to 3×VF (~2.1V) without damage.

Key Specifications

Pinout & Package

MAX963ESD is housed in a 14-pin Small Outline (SO-14) package with exposed pad thermal enhancement. Pin assignments are optimized for noise immunity and layout simplicity in high-speed analog-digital boundary applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH7322MA/NOPB and ADCMP602BRMZ, the MAX963ESD uniquely combines dual-channel operation, latch-enable, internal hysteresis, and SO-14 packaging-enabling compact, self-contained threshold detection and sampling control without external support circuitry.

Availability

MAX963ESD is available at Aetrix Electronics and suitable for GPS receivers, portable battery-powered systems, high-speed sampling circuits, and line receiver interfaces requiring stable component supply across industrial temperature ranges (–40°C to +85°C).

Supply support for MAX963ESD 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 U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-speed interface ICs for industrial, communications, and consumer applications.

The MAX961–MAX964 family was designed specifically for ultra-high-speed, low-power comparator applications in portable and timing-critical systems-emphasizing rail-to-rail input operation, integrated hysteresis, and latch functionality.

FAQ

What is the operating temperature range for the MAX963ESD?

The MAX963ESD is specified for operation from –40°C to +85°C (E grade). This range is validated across all electrical parameters including propagation delay, input offset voltage, and supply current. The MAX963ESD does not support extended temperature grades like the MAX999AAUK, and its performance remains stable within this industrial-grade envelope without derating.

Does the MAX963ESD require external hysteresis resistors?

No, the MAX963ESD includes fixed 3.5mV internal hysteresis, eliminating the need for external feedback resistors. This hysteresis is factory-trimmed and guaranteed over temperature, ensuring consistent noise immunity in threshold detection applications. External resistors would disrupt the calibrated hysteresis zone and are neither recommended nor required for normal operation of the MAX963ESD.

How does the latch-enable function work on the MAX963ESD?

The MAX963ESD provides dedicated latch-enable inputs (LEA and LEB) for each comparator channel. When LE is low, the output follows the comparator decision in real time (transparent mode). When LE goes high, the current output state is latched and held regardless of subsequent input changes. The MAX963ESD guarantees 5ns setup and hold times, enabling reliable capture of transient events synchronized to external clocks or control signals.

Can the MAX963ESD operate from a 3.3V supply?

Yes, the MAX963ESD operates from +2.7V to +5.5V, making it fully compatible with 3.3V systems. At VCC = 3.3V, output high voltage remains ≥2.78V and output low voltage ≤0.52V under 4mA load, ensuring robust TTL/CMOS logic compatibility. Propagation delay increases slightly to ~5.2ns (vs. 4.5ns at 5V), but remains well within high-speed design margins for the MAX963ESD.

What is the maximum capacitive load the MAX963ESD outputs can drive?

The MAX963ESD outputs are characterized with a 5pF load, and propagation delay increases linearly with capacitance. While not explicitly rated for heavy loads, practical use shows stable operation up to 20pF with <1ns added delay. For loads exceeding 20pF, a buffer or series resistor is recommended to prevent ringing and maintain timing integrity-especially critical in sampling circuits where the MAX963ESD's 4.5ns delay must be preserved.