Analog Devices Inc./Maxim Integrated MAX9377EUA

Overview

MAX9377EUA from Maxim Integrated is a fully differential, high-speed LVPECL translator with pin-selectable divide-by-four function, 421ps typical propagation delay, 2GHz switching frequency, and ±100mV minimum differential input amplitude support - designed for backplane logic standard translation in telecom routing systems.

For engineers reviewing the MAX9377EUA datasheet, MAX9377EUA pinout, MAX9377EUA application, or MAX9377EUA equivalent, this device serves as an anything-to-LVPECL level shifter with guaranteed low pulse skew (≤30ps), temperature-compensated outputs, and single +3.3V supply operation across –40°C to +85°C.

Technical Context

The MAX9377EUA implements a bipolar-based differential translator architecture with emitter-follower LVPECL outputs requiring 50Ω termination to (VCC – 2.0V). Its internal frequency divider uses asynchronous RST and level-sensitive SEL inputs to enable or reset the ÷4 function without clock-domain constraints.

It accepts any differential input standard (LVDS, LVPECL, HSTL, CML) within 0.05V to (VCC – 0.05V) common-mode range and ≥100mV amplitude, delivering LVPECL outputs compliant with EIA/TIA-644 timing margins and jitter specs (≤2ps_RMS random jitter at 1.34GHz).

Key Specifications

Pinout & Package

MAX9377EUA is housed in an 8-pin µMAX package (3.05mm × 3.05mm, 0.6mm height), thermally optimized for high-density PCB layouts with exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LVPECL translation applications.

Compared with MAX9378EUA, MAX9377EUA delivers higher drive strength for legacy LVPECL infrastructure; versus MC100EP016A, it reduces system-level component count by embedding the divider and operating from a single 3.3V rail.

Availability

MAX9377EUA is available at Aetrix Electronics and suitable for backplane routing logic, DSLAM line card timing, and WAN edge router clock distribution requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX9377EUA 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, mixed-signal, and high-speed interface ICs for communications, computing, and industrial applications.

The MAX9377EUA belongs to Maxim's high-speed translator product line, engineered specifically for signal integrity-critical telecom infrastructure where low jitter, wide input compatibility, and compact packaging are mandatory.

FAQ

What signaling standards does the MAX9377EUA accept on its differential inputs?

The MAX9377EUA accepts LVDS, LVPECL, HSTL, and CML differential inputs with ≥100mV amplitude and common-mode range from 0.05V to (VCC – 0.05V). It does not require external biasing or level-shifting circuitry, making MAX9377EUA suitable for heterogeneous interface bridging in multi-standard systems.

How is the divide-by-four function enabled on the MAX9377EUA?

The divide-by-four function on MAX9377EUA is controlled by the SEL pin: logic high enables division, logic low bypasses it. An asynchronous RST pin resets the internal divider counter. Both pins use LVCMOS/LVTTL logic levels and feature internal 75kΩ pulldowns, ensuring predictable startup behavior without external pull resistors.

What is the correct termination scheme for MAX9377EUA LVPECL outputs?

MAX9377EUA LVPECL outputs require 50Ω termination to (VCC – 2.0V) on both OUT and OUT pins. This may be implemented with two discrete 50Ω resistors to a dedicated bias rail or via Thevenin-equivalent networks. Mismatched termination causes output distortion and violates the 595–725mV differential swing specification of MAX9377EUA.

Does the MAX9377EUA support operation at 2.5GHz?

The MAX9377EUA guarantees 2.0GHz minimum switching frequency; 2.5GHz is specified as typical under conditions where VOH – VOL ≥ 250mV. For production designs targeting 2.5GHz, derating for temperature, supply variation, and board losses is required - MAX9377EUA is not characterized for guaranteed 2.5GHz operation across full temperature and voltage ranges.

What is the maximum allowable random jitter for the MAX9377EUA?

The MAX9377EUA has a maximum added random jitter of 2ps_RMS when driven with a 1.34GHz input signal and SEL = 0. This value is measured at the output and includes contributions from internal circuitry only - total system jitter must also account for input source jitter and PCB-induced noise affecting MAX9377EUA performance.