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MAX3949 - AC-Coupled Laser Driver

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.

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.

View original datasheet text
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.
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