Analog Devices Inc./Maxim Integrated MAX9693ESE+T

Overview

The MAX9693ESE+T from Maxim Integrated is a dual ultra-fast ECL-output comparator with latch-enable functionality, designed for high-speed signal conditioning in RF and digital test systems. It delivers 1.2ns typical propagation delay, 100ps channel-to-channel propagation match, and operates from +5V/-5.2V supplies to drive 50Ω-terminated transmission lines at >600MHz bandwidth.

For engineers reviewing the MAX9693ESE+T datasheet, MAX9693ESE+T pinout, MAX9693ESE+T application, or MAX9693ESE+T equivalent, key selection criteria include latch-enable timing (0.5ns setup/hold), ECL-compatible differential inputs, open-emitter outputs requiring external pull-down resistors, and QSOP-16 package compatibility with high-density PCB layouts.

Technical Context

The MAX9693ESE+T implements two independent high-speed comparators in a single BiCMOS die, each with fully differential ECL-level inputs and complementary open-emitter outputs. Its latch-enable architecture supports sample-hold operation with precise timing control: LEA/LEB inputs accept ECL-low pulses to freeze output states based on instantaneous input conditions.

Each channel features matched propagation paths (≤100ps skew), low dispersion (150ps), and robust common-mode rejection (60–80dB) across -2.5V to +3.0V input range. The device requires external 50Ω–200Ω pull-down resistors to -2.0V or 240Ω–2000Ω to -5.2V, and mandates ground-plane PCB layout with localized 0.01µF decoupling at VCC/VEE pins.

Key Specifications

Pinout & Package

MAX9693ESE+T is housed in a 16-pin narrow SO (Small Outline) package with 1.27mm pitch, RoHS-compliant and lead-free per Maxim's "+" suffix designation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9693EEE, the MAX9693ESE+T offers identical performance in a more widely supported SO package with easier hand-soldering and probe access; versus ADCMP572BCPZ-R7, it provides dual-channel operation, latch-enable control, and ECL-level compatibility essential for legacy instrumentation and military-grade timing systems.

Availability

MAX9693ESE+T is available at Aetrix Electronics and suitable for high-speed line receivers, peak detectors, threshold detectors, high-speed triggers, and time-interleaved data acquisition systems requiring stable component supply across industrial temperature ranges.

Supply support for MAX9693ESE+T 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.

The MAX9691/MAX9692/MAX9693 family targets ultra-high-speed signal conditioning in test equipment, radar, and digital communications where sub-nanosecond timing integrity is mandatory.

FAQ

What power supply voltages does the MAX9693ESE+T require?

The MAX9693ESE+T requires +5V on VCC and -5.2V on VEE to operate correctly. These rails establish the ECL-compatible logic thresholds and output swing. Decoupling capacitors (0.01µF ceramic) must be placed directly at each supply pin. Operating outside these specified rails risks exceeding absolute maximum ratings and may cause permanent damage to the MAX9693ESE+T.

How are the open-emitter outputs of the MAX9693ESE+T terminated?

The MAX9693ESE+T outputs are open-emitter and require external pull-down resistors to define logic levels. For -2.0V termination, use 50Ω–200Ω resistors; for -5.2V termination, use 240Ω–2000Ω resistors. Incorrect resistor values cause improper logic levels or excessive power dissipation. This termination scheme is integral to the MAX9693ESE+T's ECL compatibility and must be implemented per the datasheet layout guidelines.

Does the MAX9693ESE+T support independent latch control for each channel?

Yes, the MAX9693ESE+T provides fully independent latch-enable inputs for each channel: LEA/LEA̅ for Channel A and LEB/LEB̅ for Channel B. Each pair accepts differential ECL-level signals, allowing asynchronous or synchronized latching of either channel's output state. This independence is confirmed in the pin description and functional diagrams of the MAX9693ESE+T datasheet and enables flexible sampling architectures.

What is the guaranteed propagation delay match between channels of the MAX9693ESE+T?

The MAX9693ESE+T guarantees ≤100ps channel-to-channel propagation delay match (tPDM) over the full -40°C to +85°C operating range. This specification is explicitly listed in the AC Electrical Characteristics table and is critical for time-interleaved applications such as dual-channel oscilloscopes or parallel ADC drivers where timing skew directly impacts system resolution.

Can unused comparator inputs on the MAX9693ESE+T be left floating?

No, unused comparator inputs on the MAX9693ESE+T must not be left floating. The datasheet explicitly warns against this in the Applications Information section. Floating inputs can cause oscillation, increased power consumption, or unpredictable output behavior due to the device's high gain-bandwidth product. Inputs should be terminated to a valid common-mode voltage (e.g., via resistive divider) to ensure stable operation of the MAX9693ESE+T.