General Description
The MAX3656 is a burst-mode laser driver that operates at data rates from 155Mbps up to 2.5Gbps. The laser driver accepts either positive-referenced emittercoupled logic (PECL) or current-mode logic (CML) data inputs and provides bias and modulation current for the laser diode. The device can switch the laser diode from a completely dark (off) condition to a full (on) condition (with proper bias and modulation currents) in less than 2ns. The MAX3656 incorporates DC-coupling between laser driver and laser diode and operates with a singlesupply voltage as low as +3.0V.

Features
♦ Multirate Operation from 155Mbps to 2.5Gbps
♦ Burst Enable/Disable Delay <2ns
♦ Burst On-Time of 576ns to Infinity
♦ Infinite Bias-Current Hold Time Between Bursts
♦ DC-Coupled Operation with Single +3.3V Power Supply
♦ 40mA Typical Supply Current
♦ Programmable Bias Current from 1mA to 70mA
♦ Programmable Modulation Current from 10mA to 85mA
♦ Automatic Average Power Control with Failure Monitor (No CAPC Capacitor Needed)
♦ APC Loop Initialization ≤3 Bursts

Applications
    Fiber-to-the-Home (FTTH) and Fiber-to-the-Business (FTTB) Broadband Access Systems
    Passive Optical Network (PON) Transmitters
    APON, EPON, and GPON Upstream Transmitters