HXR44400-DNJ

Overview

The HXR44400-DNJ is a single-ended input, quad-channel linear Trans-Impedance Amplifier (TIA) array belonging to the Optical Receiver Transmitter Array (ORTA) family. It supports 56Gb/s and 112Gb/s data rates with receiver sensitivity optimized for 112Gbps PAM4 Ethernet applications. The device features low power consumption as low as 175mW/ch in 56GBaud modes and operates within an industrial temperature range of -40 °C to 95 °C. Key electrical characteristics include up to 5kΩ typical differential gain, wide adjustable output voltage swing, and linear operation up to 3mAppSE overload with internal AGC. Bandwidth reaches up to 43GHz typical, with input-referred current noise density of 10pA/√Hz.

Feature Summary

• Supports 56Gb/s and 112Gb/s linear TIA receiver applications
• Features patented adaptive biasing scheme for low power and high performance
• Includes RSSI, LOS, and Rx Disable functions with I²C interface
• Complies with 100G Lambda MSA and IEEE 802.3cd standards

Applications

• Next generation 400G/800G optical transceivers
• Linear Receiver Optical Sub-Assembly (ROSA) design
• 112Gbps PAM4 Ethernet applications

Procurement Notes

Verify the specific suffix 'DNJ' against official Renesas documentation to confirm package type and tape-and-reel specifications. Ensure the component meets the required industrial temperature range (-40 °C to 95 °C) for your target environment. Cross-reference the datasheet for exact pinout compatibility if integrating into existing ROSA designs. Confirm compliance with 100G Lambda MSA and IEEE 802.3cd standards for your specific network application requirements.

Selection Notes

Select this component when designing compact linear ROASAs requiring high bandwidth and low noise for 400G/800G transceivers. The quad-channel architecture simplifies integration with PIN detector arrays. Consider the 175mW/ch power consumption for thermal management in dense optical modules. The internal AGC and wide dynamic range support robust signal processing under varying optical input conditions.

Part Context

The HXR44400 is part of the ORTA product family, extending the capabilities of low-power TIAs. It is designed to work alongside PIN detectors to form complete optical receiver solutions. This series targets advanced modulation schemes like PAM4, enabling higher data throughput in modern optical communication infrastructure while maintaining energy efficiency.

Replacement Considerations

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