The HXT45111-4 is a single channel linear EML driver, which is a member of the Renesas family of Optical Receiver Transmitter Array (ORTA) products. Together with an EML, a compact linear transmitter can be designed for the next generation of 100G and 200G/400G optical transceivers.

The HXT45111-4 is a low-power, high-performance, single channel linear driver, designed for 112Gbps PAM4 EML–based transceivers. The device is a small form factor (SFF) packaged surface mount device (SMD) with differential inputs and single-ended outputs consisting of one 56Gbaud broadband amplifier channel. This design enables it to drive a linear output voltage of 2.0Vpp, which is suitable for 112G PAM-4 applications. 


  • Data rate up to 56Gbaud per channel for PAM-4 applications
  • Low power consumption of 200mW per channel
  • > 45GHz bandwidth
  • Build-in Bias – T and Internal high-frequency chokes
  • > 10dB dynamic range of gain control
  • Peaking on/off control
  • Low channel cross-talk
  • Small form factor SMD
  • Internally DC-blocked RF inputs and outputs
  • 7.0 × 2.85 mm SMT package

Product Options

Orderable Part ID Part Status Pkg. Type Temp. Grade Carrier Type Buy Sample
Preview LGA E Tray

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
HXT45111-4 Short-Form Datasheet Short Form Datasheet PDF 168 KB
Optical Interconnect Overview Overview PDF 649 KB