Analog Devices Inc./Maxim Integrated MAX9382ESA+

Overview

MAX9382ESA+ from Maxim Integrated is a high-speed ECL/PECL phase-frequency detector IC designed for precision PLL clock synchronization circuits. It compares single-ended reference (R) and VCO (V) inputs, delivers differential up (U/U) and down (D/D) pulse streams, features 450MHz typical bandwidth, guaranteed ≥370ps minimum pulse width, and operates across VCC–VEE = 4.2V to 5.5V at –40°C to +85°C - enabling low-jitter lock in DSLAM and base station timing systems.

For engineers reviewing the MAX9382ESA+ datasheet, MAX9382ESA+ pinout, MAX9382ESA+ application, or MAX9382ESA+ equivalent, this page delivers verified electrical parameters, SO-8 package layout, functional symmetry between R/V and U/D paths, thermal resistance data (170°C/W), and direct compatibility context with Motorola MCK12140 - all critical for high-frequency PLL loop design and ECL/PECL signal integrity validation.

Technical Context

The MAX9382ESA+ implements a symmetrical bipolar state machine with four internal states (0–3), where R and V input roles can be swapped alongside U/D output relabeling without functional change. Its reset logic guarantees minimum pulse duration ≥370ps across temperature, eliminating dead-band-induced phase offset at lock.

It supports ±π usable phase detection range with 400–450MHz maximum operating frequency, uses 100K ECL logic levels, and requires termination of each differential pair (U/U, D/D) to VCC – 2V via 50Ω resistors - ensuring predictable propagation delays (tPRU/tPVD = 575–830ps) and differential output swing (585–820mV).

Key Specifications

Pinout & Package

MAX9382ESA+ is housed in an industry-standard 8-pin SO (SOIC-N) package with 150-mil body width, 1.27mm pitch, and 170°C/W junction-to-ambient thermal resistance in still air.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar phase-frequency detector applications.

Compared with MAX9382EUA+, the MAX9382ESA+ provides lower thermal resistance and easier hand-soldering; compared with MCK12140, it delivers guaranteed dead-zone elimination and 50MHz higher bandwidth - making it the preferred choice for next-generation PLL designs demanding low jitter and production robustness.

Availability

MAX9382ESA+ is available at Aetrix Electronics and suitable for precision clock distribution, DSLAM timing modules, and base station RF synthesizers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX9382ESA+ 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX9382ESA+ belongs to Maxim's high-speed timing and clock conditioning product line, engineered specifically for low-jitter, high-bandwidth PLL implementations in telecom infrastructure and test equipment where phase accuracy and thermal stability are critical.

FAQ

What logic family is the MAX9382ESA+ compatible with?

The MAX9382ESA+ is compatible with 100K ECL logic levels and operates with VCC–VEE supply range of 4.2V to 5.5V. It accepts single-ended ECL/PECL inputs and delivers differential ECL/PECL outputs. Its VIH and VIL thresholds are referenced to VCC (e.g., VIH = VCC – 1.165V), making it suitable for both traditional negative-rail ECL (VCC = GND, VEE = –5.2V) and positive-rail PECL (VCC = +5V, VEE = GND) configurations. This dual compatibility is confirmed in the MAX9382/MAX9383 datasheet Section "Detailed Description" and DC Electrical Characteristics tables.

Does the MAX9382ESA+ require external pull-up or pull-down resistors on its inputs?

No, the MAX9382ESA+ includes internal 75kΩ pulldown resistors on both R and V inputs, eliminating the need for external biasing components. This feature is explicitly stated in the "Features" section and verified in the "Applications Information" portion of the datasheet. External resistors are unnecessary unless specific impedance matching or signal conditioning is required beyond standard ECL/PECL termination practices - which mandate 50Ω terminations on all differential outputs (U/U, D/D) to VCC – 2V.

What is the guaranteed minimum output pulse width for the MAX9382ESA+ across temperature?

The MAX9382ESA+ guarantees a minimum output pulse duration of 370ps at –40°C, 450ps at +25°C, and 430ps at +85°C, as specified in the AC Electrical Characteristics table under "Minimum Pulse Duration (tPmin)". This parameter is critical for eliminating dead-zone effects in charge-pump PLLs and is validated across the full –40°C to +85°C operating range - a key differentiator from legacy PFDs like the MCK12140, which lack such a guarantee.

Is the MAX9382ESA+ pin-compatible with the Motorola MCK12140?

Yes, the MAX9382ESA+ is explicitly documented as pin-compatible with Motorola's MCK12140 in the General Description and Features sections of the datasheet. Both devices use identical 8-pin SO and µMAX footprints, share matching pin functions (U, U, D, D, VEE, V, R, VCC), and operate with 100K ECL logic levels. This allows drop-in replacement in existing MCK12140-based designs without PCB modification - provided supply voltage and termination schemes align with MAX9382ESA+ specifications.

How should the differential outputs of the MAX9382ESA+ be terminated for optimal jitter performance?

Each differential output pair (U/U and D/D) must be terminated with 50Ω resistors to VCC – 2V, as specified in the "Pin Description" and "Applications Information" sections. For single-ended use (e.g., extracting U only), both U and U must be terminated - not just the active pin. This maintains common-mode balance, minimizes reflections, and preserves the 585–820mV differential swing. Improper termination (e.g., unterminated or AC-coupled loads) degrades timing accuracy and increases RMS jitter beyond the specified 0.2–1.0ps added random jitter limit.