Analog Devices Inc./Maxim Integrated MAX961ESA

Overview

The MAX961ESA from Maxim Integrated is a single ultra-high-speed comparator with internal hysteresis, optimized for +3V or +5V single-supply operation. It features 4.5ns propagation delay (5mV overdrive), ±3.5mV input-referred hysteresis, and Beyond-the-Rails™ input range extending 100mV beyond both supply rails. Its TTL/CMOS-compatible complementary outputs and latch-enable function support precise timing capture in GPS receivers and high-speed sampling circuits.

For engineers reviewing the MAX961ESA datasheet, MAX961ESA pinout, MAX961ESA application, or MAX961ESA equivalent, key selection criteria include propagation delay vs. overdrive, latch timing constraints (tSU = 5ns, tH = 5ns), shutdown current (270μA), output swing (within 0.52V of rails), and SO-8 package compatibility with space-constrained 3V/5V systems.

Technical Context

The MAX961ESA implements a current-driven output stage enabling rapid slew rates while maintaining low static power-output source/sink current drops after transition to sustain VOH/VOL with minimal quiescent draw. Its internal hysteresis (3.5mV) eliminates external resistor networks and prevents oscillation near trip points by establishing distinct rising/falling input thresholds.

It integrates a latch-enable input (LE) that places the comparator output into transparent mode when low and holds the last valid state when high, with guaranteed setup/hold times (5ns each) and 10ns latch propagation delay. Shutdown control (SHDN) disables internal biasing, reducing supply current to 270μA per comparator while forcing outputs to high-impedance.

Key Specifications

Pinout & Package

MAX961ESA is housed in an 8-pin SO (Small Outline) package with standard 1.27mm pitch, compatible with automated PCB assembly and IPC-7351B land patterns (document no. 90-0096).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX961EUA-T, the MAX961ESA offers identical performance in a standard SO-8 package for legacy layout reuse; versus LMH7322MA/NOPB, it provides integrated latching and lower operating current but requires attention to LE/SHDN pin control sequencing.

Availability

MAX961ESA is available at Aetrix Electronics and suitable for GPS receivers, high-speed sampling circuits, and portable/battery-powered systems requiring stable component supply across industrial temperature ranges (−40°C to +85°C).

Supply support for MAX961ESA 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 demanding industrial, communications, and consumer applications.

The MAX961ESA belongs to the MAX961–MAX964/MAX997/MAX999 family of ultra-high-speed comparators engineered for single-supply, low-power, rail-enhanced sensing in portable and timing-critical systems.

FAQ

What is the maximum operating temperature range for the MAX961ESA?

The MAX961ESA is specified over the −40°C to +85°C industrial temperature range. This rating applies to all E-grade devices including MAX961ESA, ensuring reliable operation in embedded systems deployed in harsh ambient conditions. The device's electrical characteristics-including propagation delay, input offset voltage, and supply current-are guaranteed across this full range per the datasheet's TMIN to TMAX specification.

Does the MAX961ESA require external hysteresis resistors?

No, the MAX961ESA does not require external hysteresis resistors. It integrates 3.5mV of input-referred hysteresis internally, which eliminates the need for external feedback networks. This built-in hysteresis stabilizes switching behavior near threshold voltages and prevents noise-induced oscillation-particularly valuable in GPS receivers and line receivers where signal integrity is critical. The MAX961ESA achieves clean, chatter-free output transitions without additional components.

How does the latch-enable function work on the MAX961ESA?

The latch-enable (LE) input on the MAX961ESA controls output transparency: when LE is low, the comparator output follows input changes in real time; when LE is pulled high, the current output state is held until LE returns low. The MAX961ESA guarantees 5ns setup and hold times relative to LE transitions, enabling precise synchronous capture of fast analog events. This latch function is implemented entirely within the MAX961ESA die and requires no external storage elements.

What is the output drive capability of the MAX961ESA?

The MAX961ESA outputs can sink or source 4mA while maintaining VOH ≥ VCC − 0.52V and VOL ≤ 0.52V, making them directly compatible with TTL and CMOS logic families without pull-up resistors. This rail-swing capability is maintained across the full −40°C to +85°C temperature range and supports capacitive loads up to 5pF with minimal delay degradation. The current-driven output stage delivers fast edge rates while minimizing static power consumption.

Can the MAX961ESA operate from a 3.3V supply?

Yes, the MAX961ESA operates from +2.7V to +5.5V, fully supporting 3.3V nominal supplies. At VCC = 3.3V, its propagation delay remains 4.5ns (5mV overdrive), output swing stays within 0.52V of rails (VOH ≥ 2.78V, VOL ≤ 0.52V), and supply current is approximately 7.2mA (typ). The Beyond-the-Rails™ input range also functions at 3.3V, accepting inputs from −0.1V to +3.4V-ideal for interfacing with 3.3V ADCs or sensors.