Analog Devices Inc./Maxim Integrated MAX9692EUB

Overview

The MAX9692EUB from Maxim Integrated is a single-channel, ultra-fast ECL-output comparator with latch-enable functionality, designed for high-speed signal conditioning in timing-critical systems. It delivers 1.2ns typical propagation delay, 100ps skew, and 150ps dispersion under +5V/–5.2V supplies, driving 50Ω-terminated transmission lines - enabling use in >600MHz high-speed line receivers and peak detectors.

For engineers reviewing the MAX9692EUB datasheet, MAX9692EUB pinout, MAX9692EUB application, or MAX9692EUB equivalent, key selection considerations include latch-enable timing (0.5ns setup/hold), ECL-compatible differential inputs, open-emitter outputs requiring external pull-down resistors, and operation across –40°C to +85°C in a 10-pin µMAX package.

Technical Context

The MAX9692EUB implements a BiCMOS-based ECL comparator core with fully differential input stage and complementary open-emitter outputs. Its latch-enable (LE) input enables sample-hold operation: when LE is low, outputs lock into unambiguous ECL states determined by input conditions at the latch edge.

It requires dual supplies (+5V VCC, –5.2V VEE), operates with input common-mode range from –2.5V to +3.0V, and mandates external 50Ω–200Ω pull-down resistors to –2.0V or 240Ω–2000Ω to –5.2V. GND1 and GND2 are separate internal grounds - biasing input and output stages independently - and must be connected to a solid copper ground plane.

Key Specifications

Pinout & Package

MAX9692EUB is housed in a 10-pin µMAX package (outline 21-0061), 3mm × 3mm, 0.5mm pitch, RoHS-compliant. Pin 1 is marked via laser indentation; device uses exposed pad for thermal enhancement (not electrically connected).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast ECL comparator applications.

Compared with MAX9692EUB, MAX9692ESE trades miniaturization for easier handling and thermal margin, while MAX9691EUA removes latch functionality entirely - making MAX9692EUB the sole option when both 10-pin µMAX packaging and precise LE-controlled sampling are required.

Availability

MAX9692EUB is available at Aetrix Electronics and suitable for high-speed line receivers, peak detectors, threshold detectors, high-speed triggers, and ECL-level signal conditioning requiring stable component supply across industrial temperature ranges.

Supply support for MAX9692EUB 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 industrial, communications, and computing applications, with emphasis on performance, integration, and reliability.

The MAX9691/MAX9692/MAX9693 family targets ultra-high-speed signal acquisition systems requiring sub-nanosecond timing fidelity, ECL compatibility, and deterministic latch control - specifically for test equipment, optical interconnects, and radar front-ends.

FAQ

What is the correct termination scheme for MAX9692EUB outputs?

The MAX9692EUB features open-emitter Q and Q̅ outputs requiring external pull-down resistors. For –2.0V termination, use 50Ω to 200Ω; for –5.2V termination, use 240Ω to 2000Ω. These values ensure proper ECL logic levels (VOH ≈ –0.8V, VOL ≈ –1.7V) and minimize reflections on 50Ω transmission lines. Incorrect resistor values cause slow edges or logic level violations.

How should the two ground pins (GND1 and GND2) be connected on the MAX9692EUB?

GND1 and GND2 on the MAX9692EUB must be connected together at a single point on a solid copper ground plane. GND1 biases the input differential pair, while GND2 biases the ECL output stage; separating them causes ground-loop noise and increases propagation delay skew. Do not route them through different traces or vias - direct low-inductance bonding is essential for sub-nanosecond timing stability.

Can the MAX9692EUB operate with only a single supply voltage?

No, the MAX9692EUB requires dual supplies: +5V on VCC and –5.2V on VEE. It is an ECL-family device with bipolar transistor output stages that depend on negative rail headroom for proper current steering and logic level definition. Attempting single-supply operation will result in nonfunctional outputs, excessive current draw, or permanent damage due to violation of absolute maximum ratings.

What happens if the latch-enable (LE) pin is left unconnected on the MAX9692EUB?

If the LE pin is left floating on the MAX9692EUB, the device may enter an undefined state: outputs could oscillate, latch unpredictably, or fail to respond to input changes. The datasheet explicitly requires LE to be driven to a valid ECL logic level - either grounded (for always-latched mode) or pulled to ECL-high (–1.1V min) via appropriate termination. A floating LE violates input voltage specifications and risks metastability.

Does the MAX9692EUB support AC-coupled inputs?

Yes, the MAX9692EUB supports AC-coupled inputs, but only when combined with proper DC biasing. Its input common-mode range is –2.5V to +3.0V, so AC signals must be centered within this window using resistive dividers or active bias networks. Direct capacitive coupling without bias risks violating input voltage limits and causing saturation or phase inversion - especially critical given its 60dB CMRR and 10µV/°C offset drift.