GX78471-2-DNT

Overview

The GX78471-2-DNT is a quad-channel linear driver integrated circuit designed for high-speed optical communication applications. It supports data rates up to 128 GBaud per channel, enabling aggregate throughput of 512 Gbps and beyond in advanced multi-level QAM modulation systems. The device features four differential outputs with a peak-to-peak voltage (Vppd) of 4V, optimized for driving optical modulators in 800Gbps and future generation optical modules. Operating within an industrial temperature range of -5°C to +105°C, it integrates SPI circuitry for DC control adjustments on a single die.

Feature Summary

• Quad-channel architecture supporting 128 GBaud per lane for high-bandwidth optical transmission
• 4 Vppd differential output capability tailored for advanced multi-level QAM modulation requirements
• Integrated SPI interface for precise DC control and calibration of driver parameters
• Designed specifically for metro and long-haul optical integrated transmitter small form factor modules

Applications

• 800Gbps and beyond optical transceiver modules
• Advanced multi-level QAM modulation systems
• Metro and long-haul optical network infrastructure
• Optical integrated transmitter small form factor (SFF) modules

Procurement Notes

Verify the specific suffix '-2-DNT' against official Renesas documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with existing PCB footprints and thermal management designs. Confirm availability through authorized distributors as stock levels vary. Validate that the component meets required environmental standards for the target deployment region.

Selection Notes

Select this driver when designing for 800Gbps+ optical links requiring 128 GBaud line rates. The 4Vppd output swing is critical for maintaining signal integrity in complex modulation schemes. Compare against lower-voltage variants if power consumption is the primary constraint, but ensure the selected model supports the necessary eye diagram performance for long-haul applications.

Part Context

This component belongs to Renesas' high-performance optical driver portfolio, complementing models like the GX76471 which offers 2.8Vppd outputs. While the GX76471 targets 400G/600G SFF modules, the GX78471 series is engineered for higher speed tiers. It sits alongside other RRT and GX series drivers, providing scalable solutions for evolving bandwidth demands in data center and telecommunications networks.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in public summaries. Evaluate the GX76471 for lower-speed applications (up to 64 GBaud). Verify electrical parameter overlaps before substituting. Consult Renesas engineering support for qualified alternative part numbers ensuring identical form, fit, and function for 128 GBaud designs.