MAX3676EHJ

Overview

The MAX3676EHJ is a clock-recovery and data-retiming integrated circuit designed for 622Mbps SDH/SONET applications. It incorporates a limiting amplifier, phase-locked loop (PLL), and differential PECL outputs. The device operates from a single +3.3V or +5.0V supply with a typical power consumption of 237mW at +3.3V. It supports selectable differential PECL or analog inputs and provides received-signal-strength indication (RSSI) along with loss-of-power and loss-of-lock monitors. The component meets ITU/Bellcore SDH/SONET regenerator specifications and functions within an operating temperature range of -40°C to +85°C in a 32-TQFP package.

Feature Summary

• Integrated clock recovery and data retiming with fully integrated PLL
• Selectable differential PECL or analog input interfaces
• Received-signal-strength indicator (RSSI) output
• Loss-of-power and loss-of-lock monitors

Applications

• SDH/SONET Receivers and Regenerators
• SDH/SONET Access Nodes
• Add/Drop Multiplexers
• ATM Switches
• Digital Cross-Connects

Procurement Notes

Verify the specific ordering suffix (+) for lead-free/RoHS compliance status against current manufacturer documentation. Confirm availability as distribution channels may vary. Ensure the 32-TQFP package dimensions match the target PCB footprint requirements before procurement.

Selection Notes

Select this component for OC12/STM-4 transmission systems requiring jitter performance exceeding standard SONET/SDH specifications. Choose the PECL input mode to disable the limiting amplifier and conserve power when analog signal processing is not required. Ensure external loop filter capacitors meet stability criteria for the desired jitter peaking characteristics.

Part Context

The MAX3676EHJ belongs to the Maxim Integrated family of high-speed optical communication interface components. It serves as a complete solution for clock/data recovery in optical receivers, combining amplification, timing extraction, and signal monitoring in a single package suitable for dense integration in telecommunications equipment.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.