The HXT42110 is a low power, Direct Modulated Laser (DML) driver for LR optical applications that supports data rates up to 28Gbps and optical reach up to 10km. In conjunction with a DFB laser diode array or individual DFB laser diodes, the device handles the complete digital-to-optical conversion, including a CML input stage with equalization, laser driver IBIAS and IMOD current drive control and supervision.

Designed for direct DC-coupled anode drive of the DFB laser diode for cost-effective and compact assemblies.  Available in die form.

Key Features

  • Supports Modulation / BIAS currents up to: IMOD = 60mAPP and IBIAS = 80mAPP
  • 3V Supply operations
  • Programmable Input Equalization
  • Input Signal Detect (SD) with Squelch
  • Programmable Input Polarity Inversion
  • Programmable Pulse Width Adjustment
  • Programmable Laser Modulation Current Amplitude, Peaking, and Peaking Duration
  • Integrated Temperature Sensor
  • Interrupts with User selectable Mask control
  • Laser Disable for IMOD and IBIAS
  • 2-wire interface control and symmetric pad design maximize module design flexibility
  • QSFP MSA Compliant

Applications List

  • 25G / 100G Ethernet LR 10km modules
  • 32G Fibre channel modules
  • InfiniBand 25G / 100G EDR transceivers
  • InfiniBand 25G / 100G EDR active cables
  • Proprietary multi-channel optical modules

Ordering Information

Part NumberTemp RangePin-Package
HXT42110-DNU1 HXT421102 -5°C to 95°CBare Die Design Size: 1300µm x 1070µm Nominal Die Cut Size: 1350µm x 1120µm
HXT42110EVBRoom TempEvaluation Board
Notes: 1 – Waffle Pack 2– Blue Tape