GX78471-1-DNT

Overview

The GX78471-1-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 800 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 800G and next-generation optical modules. Operating within an industrial temperature range of -5°C to 105°C, it integrates SPI circuitry for DC control functions on a single die, providing a compact solution for metro and long-haul optical transceivers.

Feature Summary

• Quad-channel linear driver architecture supporting 128 GBaud per lane
• High swing differential output capability of 4 Vppd for advanced modulation formats
• Integrated SPI interface for direct DC control management
• Optimized for low-power operation in dense optical module form factors

Applications

• 800G and higher capacity optical transceiver modules
• Advanced multi-level QAM modulation systems
• Metro and long-haul optical networking infrastructure

Procurement Notes

Verify the specific suffix -1-DNT against official Renesas documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with existing board layouts regarding pin assignments and thermal requirements. Consult authorized distributors for current availability as supply levels fluctuate. Validate that the operating temperature range meets your system's environmental constraints before finalizing procurement decisions.

Selection Notes

Select this component when designing optical engines requiring high linearity and wide bandwidth for PAM4 or QAM signals. Compare input impedance and output drive strength against alternative drivers to ensure signal integrity over PCB traces. Consider power dissipation limits and thermal management strategies given the high-speed switching characteristics. Verify that the integrated SPI controls align with your system's configuration requirements.

Part Context

This part belongs to Renesas' portfolio of high-performance optical driver ICs, specifically engineered for the evolving demands of data center interconnects and telecommunications networks. It complements other components in the optical transmitter chain, such as lasers and photodiodes, by providing precise electrical-to-optical conversion drive signals. The series represents a focus on miniaturization and energy efficiency for next-generation coherent and direct-detection modules.

Replacement Considerations

Check for direct pin-compatible alternatives within the same product family if supply constraints exist. Evaluate functional equivalents from other manufacturers only after verifying electrical parameter alignment, particularly output voltage swing and bandwidth. Ensure any substitute maintains the required SPI protocol compatibility and thermal performance characteristics.