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MAX3946 - SFP+ Laser Driver

General Description

The MAX3946 is a +3.3V, multirate, low-power laser diode driver designed for Ethernet and Fibre Channel transmission systems at data rates up to 11.3Gbps.

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

Key Features

  • S 225mW Power Dissipation Enables < 1W SFP+ MAX3946 Enabling the Use of Unmatched FP/DFB TOSAs S Supports SFF-8431 SFP+ MSA and SFF-8472 Digital Diagnostic S 225mW Power Dissipation at 3.3V (IMOD = 40mA, IBIAS = 60mA Assuming 25I TOSA) S Single +3.3V Power Supply S Up to 11.3Gbps (NRZ) Operation S Programmable Modulation Current from 10mA to 100mA (5I Load) S Programmable Bias Current from 5mA to 80mA S Programmable Input Equalization S Programmable Output Deemphasis S 25I Output.

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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
19-5182; Rev 0; 3/10 www.DataSheet4U.com TION KIT EVALUA BLE AVAILA 1.0625Gbps to 11.3Gbps, SFP+ Laser Driver with Laser Impedance Mismatch Tolerance General Description The MAX3946 is a +3.3V, multirate, low-power laser diode driver designed for Ethernet and Fibre Channel transmission systems at data rates up to 11.3Gbps. This device is optimized to drive a differential transmitter optical subassembly (TOSA) with a 25I flex circuit. The unique design of the output stage enables use of unmatched TOSAs, greatly reducing headroom limitations and lowering power consumption. The device receives differential CML-compatible signals with on-chip line termination.