Analog Devices Inc./Maxim Integrated MAX9382EUA

Overview

MAX9382EUA from Maxim Integrated is a high-speed ECL/PECL phase-frequency detector 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 minimum 370ps pulse width, and operates over -40°C to +85°C with VCC–VEE = 4.2V to 5.5V. Used in DSLAM and base station timing systems.

For engineers reviewing the MAX9382EUA datasheet, MAX9382EUA pinout, MAX9382EUA application, or MAX9382EUA equivalent, this page provides verified electrical parameters, µMAX package details, ECL/PECL interface behavior, propagation delay specs (tPRU = 650ps typ), and pin-compatible alternatives to Motorola MCK12140 for high-frequency lock-loop design.

Technical Context

The MAX9382EUA implements a symmetrical state-machine-based phase-frequency detection architecture supporting ±π usable phase detection range. Its dual-path input structure enables frequency comparison when fR ≠ fV and precise phase tracking when fR = fV, with automatic zero-state initialization upon frequency mismatch.

It uses bipolar process technology (706 transistors), supports both ECL (VEE negative, VCC = GND) and PECL (VCC positive, VEE = GND) configurations, and requires 50Ω termination to VCC – 2V on all differential outputs. Internal 75kΩ pulldown resistors simplify single-ended input biasing.

Key Specifications

Pinout & Package

MAX9382EUA is housed in an 8-pin µMAX package (3.05mm × 3.05mm × 0.8mm, 0.65mm pitch), pin-compatible with industry-standard SO-8 but with 60% smaller footprint and higher thermal resistance (221°C/W still air).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9382ESA and MC12140, the MAX9382EUA offers identical core functionality in a space-constrained µMAX package with rigorously specified minimum pulse width-critical for jitter-sensitive PLLs-while MC12140 lacks that guarantee and MAX9382ESA trades size for thermal performance.

Availability

MAX9382EUA is available at Aetrix Electronics and suitable for DSLAM timing modules, base station clock recovery systems, and precision clock distribution networks requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX9382EUA 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 MAX9382EUA belongs to Maxim's high-speed timing and clocking product line, engineered specifically for telecom infrastructure applications demanding sub-nanosecond timing accuracy, ECL/PECL interoperability, and guaranteed jitter performance in PLL feedback paths.

FAQ

What logic family is the MAX9382EUA compatible with?

The MAX9382EUA is compatible with ECL-100K logic levels. Its input thresholds (VIH = VCC – 0.88V, VIL = VCC – 1.475V) and output swing (VOH – VOL = 820mV typ) meet 100K specifications. It is pin-compatible with Motorola's MCK12140 and functions correctly in both ECL (VEE negative) and PECL (VEE ground) configurations. The MAX9382EUA does not support 10H logic-that is reserved for the MAX9383 variant.

Does the MAX9382EUA require external biasing resistors on its R and V inputs?

No, the MAX9382EUA includes internal 75kΩ pulldown resistors on both R and V inputs, eliminating the need for external bias components. This simplifies layout, reduces BOM count, and improves consistency across production units. External pullups are unnecessary unless interfacing with open-emitter sources requiring active termination.

What is the guaranteed minimum output pulse duration for the MAX9382EUA, and why does it matter?

The MAX9382EUA guarantees a minimum output pulse duration of 370ps at –40°C, increasing to 470ps at +25°C. This specification eliminates dead-zone behavior in charge-pump PLLs, preventing accumulated phase offset and deterministic jitter at lock. Without this guarantee-as seen in older PFDs-the loop may exhibit static phase error or increased RMS jitter under steady-state conditions.

Can the MAX9382EUA operate in both ECL and PECL configurations?

Yes, the MAX9382EUA supports both ECL and PECL operation. For ECL mode, connect VCC to system ground and VEE to a negative supply (–4.2V to –5.5V). For PECL mode, connect VEE to ground and VCC to a positive supply (+4.2V to +5.5V). In both cases, outputs must terminate to VCC – 2V via 50Ω resistors, and power-supply bypassing with 0.1µF + 0.01µF ceramics is mandatory.

What is the thermal resistance of the MAX9382EUA µMAX package, and how does it affect design?

The MAX9382EUA in the 8-pin µMAX package has a junction-to-ambient thermal resistance of 221°C/W in still air. This value is higher than the SO-8 version (170°C/W), meaning more careful attention to copper pour, thermal vias, and ambient temperature is required in high-current (44mA typical) applications. Derating above 70°C ambient is recommended to maintain junction temperature below 150°C maximum.