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MAX3949 - AC-Coupled Laser Driver

General Description

The MAX3949 is a 3.3V, multirate, low-power laser diode driver designed for Ethernet, Fibre Channel, and SONET transmission systems at data rates up to 11.3Gbps.

This device is optimized to drive a differential transmitter optical subassembly (TOSA) with a 25Ω flex circuit.

Key Features

  • Low Power Consumption.
  • Saves Board Space.
  • Small 3mm x 3mm Package.
  • Flexibility.
  • Programmable Modulation Current Up to 85mA (5Ω Load).
  • Programmable Bias Current Up to 105mA.
  • Programmable Input Equalization and Output Deemphasis.
  • Safety.
  • Supports SFF-8431 SFP+ MSA and SFF-8472 Digital Diagnostic.
  • Integrated Eye Safety Features with Maskable Faults.
  • Bias Current Monitor.

📥 Download Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MAX3949 EVALUATION KIT AVAILABLE 11.3Gbps, Low-Power, AC-Coupled Laser Driver General Description The MAX3949 is a 3.3V, multirate, low-power laser diode driver designed for Ethernet, Fibre Channel, and SONET transmission systems at data rates up to 11.3Gbps. This device is optimized to drive a differential transmitter optical subassembly (TOSA) with a 25Ω flex circuit. The unique design of the output stage enables use of unmatched TOSAs. The device receives differential AC-coupled signals with on-chip termination. It can deliver laser modulation currents of up to 85mA at an edge speed of 22ps (20% to 80%) into a 5Ω external differential load. The device is designed to have a high-bandwidth differential signal path with on-chip back termination resistors integrated into its outputs.