PX6419 12x10 Gb/s VCSEL Driver Product Brief January 2005 Features • 12x10 Gb/s VCSEL Driver • Single +3.3V supply dissipating 142 mW per channel • Serial digital interface for global and individual channel control • Individual channel control for enable, modulation and bias current • On-chip adjustable VCSEL temperature compensation • Adjustable output current waveform for VCSEL jitter reduction • Analog control input for closed-loop optical power optimization • VCSEL open/short detection with autonomous fault handling • 250-micron channel pitch matches optical ribbon fiber and array VCSELs • Differential CML inputs with on-chip termination Description The growing use of the Internet has created increasingly higher demand for multi-Gb/s I/O performance. The demand for 1 Tb/s+ WAN bandwidth fuels the growth of short-reach 120 Gb/s infrastructures within high-end telco and datacom routers, switches, servers and other proprietary chassis-to-chassis links. The Zarlink PX6419 12X10 Gb/s VCSEL Driver* is a 12-channel VCSEL driver designed for various 12x10 Gb/s, 120 Gb/s parallel optics and CWDM PMD applications. It consists of a DCcoupled amplifier with selectable modulation and bias currents optimized for driving commercially available, common cathode VCSELs from a single +3.3 V supply. Applications • Proprietary 120 Gb/s intra-system parallel optics • Proprietary 12-lane optical modules and CWDM • 10GbE, 10GFC, OC-192 VSR parallel optics Individual channel settings are used to control the modulation and bias current and their temperature coefficients, allowing the optical output power and extinction ratio to be optimized. Data controlling the Zarlink PX6419 VCSEL Driver settings is loaded by a simple four-wire CMOS serial interface that features read/write and daisy chain capabilities. 1 Zarlink Semiconductor Inc. Product Brief PX6419 Figure 1: Zarlink PX6419 IC driving a commercially-available VCSEL at 10 Gb/s with a PRBS 231-1 pattern Figure 2: Application Block Diagram * APC PX6419 TX Data Sense Photo Diode CTL_IN 50 Ohms LDIN0_P 50 Ohms LDIN0_N 50 Ohms LDIN1_P 50 Ohms LDIN1_N 50 Ohms LDIN11_P 50 Ohms LDIN11_N LDOUT0 LDOUT1 LDOUT11 STB DATA_OUT CLK STB Optical Fiber DATA_IN CLK IO MICRO CONTROLLER * 2-Wire Interface DATA CLK 4-Wire STB Interface DATA CLK IO PX6429 STB DATA_OUT CLK IO 50 Ohms AMPOUT0_P 50 Ohms AMPOUT 0_N 50 Ohms AMPOUT1_P 50 Ohms AMPOUT 1_N 50 Ohms AMPOUT11_P 50 Ohms AMPOUT11_N STB DATA_IN CLK TIA0_IN TIA1_IN TIA11_IN * Optional Configuration RX Data 2 Zarlink Semiconductor Inc. For more information about all Zarlink products visit our Web Site at www.zarlink.com Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively “Zarlink”) is believed to be reliable. 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