Analog Devices Inc./Maxim Integrated MAX9601EUP

Overview

The MAX9601EUP from Maxim Integrated is a dual-channel ultra-high-speed PECL-output comparator with 500ps propagation delay, 10ps channel-to-channel skew, and adjustable hysteresis via external resistor. It operates from -5.2V/+5V supplies, accepts differential inputs from (VEE + 3V) to (VCC − 2V), and drives 50Ω-terminated transmission lines directly. It is used in high-speed ATE front ends for VLSI memory testing where sub-nanosecond timing fidelity and low dispersion are critical.

For engineers reviewing the MAX9601EUP datasheet, MAX9601EUP pinout, MAX9601EUP application, or MAX9601EUP equivalent, this page delivers verified electrical parameters, validated PECL output behavior, latch-enable timing constraints, hysteresis configuration guidance, and real-world layout considerations for 4Gbps signal restoration and threshold detection.

Technical Context

The MAX9601EUP implements a bipolar differential input stage with 70dB CMRR and ESD-protected inputs, paired with open-emitter PECL output drivers referenced to VCCO_. Its latch-enable architecture supports track-hold and sample-hold modes using complementary differential control signals driven by standard PECL logic.

Propagation delay dispersion is actively minimized across input overdrive (100mV–2V), common-mode voltage (VEE+3V to VCC−2V), slew rate (0.2–10V/ns), and duty cycle (10%–90%), with typical variation ≤30ps. Hysteresis is current-controlled via RHYS_ (10kΩ–35kΩ to GND), yielding 5–60mV input-referred hysteresis.

Key Specifications

Pinout & Package

MAX9601EUP is housed in a 20-pin TSSOP package (4.4mm width) with exposed pad for thermal enhancement. All pins are surface-mount, lead-free, and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9600EUP and LMH7322MA, the MAX9601EUP uniquely combines 500ps delay, PECL output compatibility with programmable VCCO_, and integrated latch/hysteresis-making it the only option for new 4Gbps ATE and high-speed scope front-end designs requiring both precision timing and flexible interface control.

Availability

MAX9601EUP is available at Aetrix Electronics and suitable for VLSI memory test systems, high-speed oscilloscope front ends, logic analyzer triggering modules, and signal restoration circuits requiring stable component supply across industrial temperature ranges.

Supply support for MAX9601EUP 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and test equipment markets.

The MAX9600/MAX9601/MAX9602 family was designed specifically for ultra-high-speed timing-critical applications including automated test equipment, high-bandwidth instrumentation, and signal integrity restoration-where sub-nanosecond propagation delay and minimal skew are mandatory.

FAQ

What is the recommended termination for MAX9601EUP PECL outputs?

The MAX9601EUP PECL outputs require external 50Ω pull-down resistors (RL) connected from each output (QA, QA, QB, QB) to VT = VCCO_ − 2V. For VCCO_ = 5V, VT = 3V. Resistors must be 50Ω to 75Ω, placed as close as possible to the output pins to maintain signal integrity at 4Gbps. Do not tie outputs directly to VCCO_ or GND.

How does hysteresis work on the MAX9601EUP, and what resistor value gives 20mV hysteresis?

Hysteresis on the MAX9601EUP is current-controlled: a resistor (RHYS_) from HYSA/HYSB to GND sets hysteresis current, which translates to input-referred voltage. Per the datasheet's "Hysteresis vs. RHYS to GND" curve, 20mV corresponds to RHYS_ ≈ 25kΩ. Values between 10kΩ and 35kΩ yield 5–60mV hysteresis; leaving HYS_ open results in zero hysteresis.

Can the MAX9601EUP operate with a single +3.3V supply?

No. The MAX9601EUP requires dual supplies: a negative rail (VEE = −4V to −6V) and a positive rail (VCC = +4.3V to +6.3V), plus a separate VCCO_ rail (2.4V to VCC) for PECL output biasing. It is incompatible with single-ended 3.3V operation. Bipolar architecture mandates split supplies for its differential input stage and emitter-follower outputs.

What is the minimum input slew rate required to avoid oscillation on the MAX9601EUP?

To prevent oscillation during threshold crossing, the MAX9601EUP requires ≥5V/µs input slew rate under typical conditions. Slower slew rates increase susceptibility to parasitic feedback; adding hysteresis (via RHYS_) mitigates this. Layout quality and source impedance also affect the effective minimum-poor layout may raise the requirement to >10V/µs.

Is the MAX9601EUP pin-compatible with the MAX9600EUP?

Yes-MAX9601EUP and MAX9600EUP share identical 20-pin TSSOP pinouts and footprint. However, their latch-enable input voltage ranges differ: MAX9600EUP uses ECL logic levels (−2V to 0V), while MAX9601EUP uses PECL levels (0V to VCCO_). Swapping them requires adjusting the LE_/LE_ drive circuitry to match the target logic family.