Analog Devices Inc./Maxim Integrated MAX9383EUA

Overview

MAX9383EUA from Maxim Integrated is a high-speed ECL/PECL phase-frequency detector (PFD) 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, guarantees minimum 370ps output pulse width, operates up to 450MHz, and supports ±π phase detection range in telecom timing applications.

For engineers reviewing the MAX9383EUA datasheet, MAX9383EUA pinout, MAX9383EUA application, or MAX9383EUA equivalent, this device is critical for low-jitter PLL design in DSLAMs, base stations, and ATE systems where guaranteed short-pulse elimination of dead-band and tight propagation delay matching (tPRU = tPVD = 650ps typ) directly impact loop stability and phase noise performance.

Technical Context

The MAX9383EUA implements a symmetrical state-machine PFD architecture with dual differential outputs, supporting both phase and frequency detection modes. Its 10H logic compatibility requires VCC–VEE = 4.75V to 5.5V and enables direct interface with PECL-level VCOs and charge pumps.

It features matched R→U/D and V→U/D propagation delays (±20ps max mismatch), 75kΩ internal input pulldowns, ±2kV HBM ESD protection, and differential output voltage of 650–822mV across temperature - all optimized for integration into high-bandwidth analog/digital PLL loops requiring sub-1ps added jitter.

Key Specifications

Pinout & Package

MAX9383EUA is housed in an 8-pin µMAX package (3.05mm × 3.05mm, 0.6mm height), pin-compatible with MCH12140 and optimized for high-density PCB layouts in telecom modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC12140 and HMC439, the MAX9383EUA uniquely combines guaranteed 370ps minimum pulse width, 75kΩ internal pulldowns, and 8-pin µMAX packaging - delivering production-ready, low-jitter PLL performance without external support components or layout complexity.

Availability

MAX9383EUA is available at Aetrix Electronics and suitable for DSLAM timing modules, wireless base station clock synthesis, and precision ATE clock distribution requiring stable component supply across extended product lifecycles.

Supply support for MAX9383EUA 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 RF ICs for industrial, communications, and computing markets.

The MAX9383EUA belongs to Maxim's high-speed timing and clock management product line, engineered specifically for low-jitter, high-bandwidth PLL implementations in telecom infrastructure and test equipment.

FAQ

What logic family is the MAX9383EUA compatible with?

The MAX9383EUA is compatible with 10H ECL/PECL logic standards. It operates with VCC–VEE = 4.75V to 5.5V and accepts input voltage thresholds referenced to VCC (e.g., VIH = VCC – 1.23V min). This allows direct interfacing with PECL clock sources and VCOs without level translation, making the MAX9383EUA ideal for high-speed telecom timing circuits where signal integrity is critical.

Does the MAX9383EUA require external pull-down resistors on its R and V inputs?

No, the MAX9383EUA includes 75kΩ internal input pulldown resistors on both R and V pins. These eliminate the need for external resistors in most applications, simplifying PCB layout and reducing BOM count. The internal pulldowns ensure defined logic states during power-up, standby, or unterminated conditions - a key reliability feature confirmed in the MAX9383EUA datasheet's DC characteristics table.

What is the guaranteed minimum output pulse width for the MAX9383EUA, and why does it matter?

The MAX9383EUA guarantees a minimum output pulse duration of 370ps across temperature. This eliminates the dead-band region in charge-pump PLLs, preventing static phase offset at lock and reducing integrated jitter. In practical terms, this specification ensures the MAX9383EUA delivers true zero-phase-error performance in high-precision timing loops - a verified parameter in the device's AC electrical characteristics table under t_Pmin.

How does the MAX9383EUA differ from the MAX9382EUA?

The MAX9383EUA uses 10H logic levels and requires VCC–VEE = 4.75V to 5.5V, whereas the MAX9382EUA uses 100K logic with VCC–VEE = 4.2V to 5.5V. The MAX9383EUA is pin-compatible with MCH12140, while the MAX9382EUA matches MCK12140. Their propagation delays and supply currents also differ slightly - e.g., MAX9383EUA draws 44mA typical vs. 43mA for MAX9382EUA - making the MAX9383EUA better suited for modern PECL-based systems.

Can the R and V inputs of the MAX9383EUA be swapped in a design?

Yes, the MAX9383EUA is functionally symmetrical: R and V inputs can be swapped, provided U/U and D/D outputs are correspondingly relabeled. This flexibility allows designers to assign reference and VCO roles based on board routing constraints without altering performance. The symmetry is explicitly documented in the MAX9383EUA's Detailed Description section and validated by identical AC/DC specs for both input paths.