MT25EW Bookham Technology, MT25EW Datasheet - Page 14

• Manufacturer Part Number: MT25EW
• Description: 2.5 Gb/s Transmitter Module - Dwdm, 50 & 100GHz
• Manufacturer: Bookham Technology

www.bookham.com
www.bookham.com
System installation
Electrostatic precautions
The module has built in protection and is qualified to ±500 V, however the following procedures for handling ESD
sensitive devices are recommended:
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Fibre handling
The secondary coated fibre pigtail has a nominal length of 1000 mm. Do not subject the fibre to excessive force and
observe the minimum bend radius of 30 mm. The standard connector is an SC, C28 type. During soldering operations
the fibre must be protected from excessive heat, maximum 85°C, and flux/cleaner contamination.
Soldering
It is recommended that the module is hand soldered. If wave soldering is used observe the maximum temperature
and soldering times. In addition the case, which is not sealed, must not be immersed in or sprayed with any liquids.
General PCB layout guidelines
This module is a high speed electronic device. If the following advice is not adhered to, the module may fail to operate
as required:
• follow high speed ECL design rules
• all high speed output lines must be controlled impedance lines with the termination impedance matching the line
• ensure that data and clock lines are as short and as straight as possible, and are isolated from noise sources
• ensure that the +5 V supply rail is decoupled and filtered
• use a multilayer PCB so that the ground plane surrounds the area underneath and around the receiver. Attach all
• all unused outputs must be terminated. Recommended components are surface mount resistors and ceramic
Recommended system interface
impedance. Ensure that paired lines such as DATA and DATA are of equal length. Avoid impedance interruptions
such as 90° bends
and from each other
ground pins directly to the ground plane with no additional lead length
capacitors, X7R or equivalent
reduce body charge by using non metallic carbon wrist stations
ground the measuring and inspecting equipment and the work stations
conduct assembly and testing at static protected work areas
open shipment cartons in a static protected area
make carrier jigs and packing cases conductive
Thinking optical solutions
Thinking optical solutions