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PX5419A 12 x 3.6 Gb/s VCSEL Driver with ACJTAG Product Brief
October 2005
Description The growing use of the Internet has created increasingly higher demand for multi-Gb/s I/O performance. The demand for 100 Gb/s+ WAN bandwidth fuels the growth of short-reach 40 Gb/s infrastructures within high-end telco and datacom routers, switches, servers and other proprietary chassis-to-chassis links. Features * * * * * * * * * * 12x3.6 Gb/s VCSEL Driver Single +3.3V supply dissipating 100 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 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 and LVPECL compatible inputs with on-chip termination ACJTAG boundary scan testability The Zarlink PX5419A 12X3 Gb/s VCSEL Driver* with ACJTAG is a twelve-channel VCSEL driver designed for various 12x3 Gb/s parallel 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. 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 Primarion PX5419A VCSEL Driver settings is loaded by a simple four-wire CMOS serial interface that features read/write capabilities. The Primarion PX5419A Driver provides full ACJTAG support for boundary scan testability, allowing either AC or DC module connectivity validation and systems test.
Applications * * * * SNAP12 MSA OC-768 VSR parallel optics Proprietary 40 Gb/s intra-system parallel optics InfinibandTM 12X parallel optics PMD
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Zarlink Semiconductor Inc.
PX5419A
Product Brief
Figure 1: Zarlink PX5419A IC driving a commercially-available VCSEL at 3 Gb/s with a PRBS23 pattern.
Figure 2: Application block diagram utilizing the PX5419A VCSEL driver and the PX5429A optical receiver
PX5419A
50 Ohms 50 Ohms 50 Ohms 50 Ohms LDIN 0_P LDIN 0_N LDIN 1_P LDIN 1_N GND LDOUT0 GND LDOUT1
TX Data
50 Ohms 50 Ohms MICRO CONTROLLER 2-Wire Interface DATA DATA CLK STB 4-Wire Interface LDIN11_P LDIN11_N GND D_IN D_OUT CLK STB LDOUT11
DATA CLK
OPTIONAL MICRO CONTROLLER 2-Wire Interface DATA DATA CLK STB
4-Wire Interface
PX5429A
D_IN D_OUT CLK STB AMPOUT0_P AMPOUT0_N TIA_IN0 AMPOUT1_P AMPOUT1_N TIA_IN1 DET_BIAS DET_BIAS
DATA CLK
Optical fiber
50 Ohms 50 Ohms 50 Ohms 50 Ohms
RX Data
50 Ohms 50 Ohms
AMPOUT 11_P AMPOUT11_N
DET_BIAS TIA_IN11
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Zarlink Semiconductor Inc.
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Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink's conditions of sale which are available on request.
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TECHNICAL DOCUMENTATION - NOT FOR RESALE

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