GX78474-3-DNT

Overview

The GX78474-3-DNT is a quad-channel linear driver IC designed for high-speed optical communication applications. It supports data rates up to 128 Gbaud per channel, enabling aggregate throughput of 800 Gbps and beyond in advanced multi-level QAM modulation systems. The device features four differential outputs with a peak-to-peak differential voltage (Vppd) of 4V. It is specifically engineered for use in 800G and next-generation optical modules requiring precise signal integrity and low power consumption.

Feature Summary

• Integrates four independent linear driver channels on a single die for compact system design
• Supports advanced multi-level QAM modulation schemes for high spectral efficiency
• Provides differential output stages optimized for silicon photonics modulators
• Designed for low-power operation in metro and long-haul optical transmission environments

Applications

• 800G and beyond optical transceiver modules
• Advanced multi-level QAM modulation systems
• Metro and long-haul optical network infrastructure

Procurement Notes

Verify the specific suffix -DNT indicates wafer form factor or die configuration when sourcing. Confirm compatibility with existing PCB layouts and thermal management requirements for high-density optical modules. Ensure supply chain authenticity through authorized Renesas distributors to prevent counterfeiting of high-performance analog components.

Selection Notes

Select this component when designing optical engines requiring 128 Gbaud linearity and 4V differential swing. Compare against lower-speed variants like the GX76474 if 64 Gbaud suffices for the target application. Consider the integration of SPI controls for DC biasing adjustments during the schematic phase to optimize link performance.

Part Context

This part belongs to Renesas' family of high-speed linear drivers for optical communications. It complements other models such as the GX76474 and GX79474, offering varying output voltages and data rate capabilities. The series addresses the growing demand for higher bandwidth in data center interconnects and telecommunications networks.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in public documentation. Evaluate the GX79474 for similar 4-channel architectures but verify output voltage differences. Cross-reference with GX76474 only if reduced data rate requirements allow for architectural changes.