1. Copyright © 2015 Reflex Photonics Inc. www.reflexphotonics.com Page 1 (of 2)
Document number: 970-00244 REV01
LightABLE™ SR4 Transceiver BRIEF LH series
The Reflex Photonics 40Gbps
LightABLE™ SR4 LH series Transceiver
Industrial, Extended and Commercial
Temperature Range
Product Summary
The Reflex Photonics LightABLE™ SR4 Optical
Transceiver includes 4 transmit and 4 receive
channels in a parallel fiber configuration. It supports
up to 41.25 Gbps full duplex.
The LightABLE™ SR4 Pluggable/Surface Mount
Optical Engine is a low-profile parallel transceiver.
The optical engines can be mounted directly upon a
high-speed printed circuit board via surface mount
technology or attached via a pluggable connector.
Short electrical traces from the Host ASIC connect
high-speed electrical data signals to the Reflex
LightABLE™ SR4 optical engine.
The Reflex LightABLE
™
SR4 optical engine’s self-
contained design makes it simple to add to any
application which can benefit from high-speed,
short-reach optical connectivity.
Applications:
 Backplane extensions
 Proprietary inter and intra board data links
 Test equipment
Compatible with:
 10 and 40 Gbps Ethernet
 QSFP+
 Xilinx
®
transceivers
 Altera
®
Stratix™ V transceivers
 Proprietary protocols with balanced code
Specification and Feature Highlights:
 Industrial temperature range -40 to +85 °C
 Extended temperature range -5 to +85°C
 Commercial temperature range 0 to +70°C
 10.3125 Gbps per channel
 4 transmit and 4 receive channels
 Industry standard MT-terminated connector
 850nm wavelength
 Over 100 m reach on OM3 ribbon fiber
 3.4 cm
2
footprint for surface mount
 0.8 W power consumption
 AC coupled to the host ASIC
 CML high-speed electrical interface
 Programmable via two-wire communication
interface
 Data protocol agnostic
 RoHS compliant
Please see Product Datasheet 970-00241 for detailed
specifications.
Functional Diagram
Functional Diagram of LightABLE™ SR4 Transceiver
Application example
Application example of AMC (advanced mezzanine
card) connection using LightABLE™ SR4 optical
engines

2. Copyright © 2015 Reflex Photonics Inc. www.reflexphotonics.com Page 2 (of 2)
Document number: 970-00244 REV01
LightABLE™ SR4 Transceiver BRIEF LH series
Mechanical
The Reflex LightABLE™ SR4 optical engine’s small
form factor and low power consumption make it ideal
for space-constrained applications.
LightABLE™ SR4 module dimensions
Optical Interface Lanes
The figure and table below show the orientation of
the multi-mode fiber facets of the optical connector
and the lane assignment respectively.
Outside view of the LightABLE™ SR4 Transceiver
module MT receptacle
MT
Fiber #
Lane
Assignment
MT
Fiber #
Lane
Assignment
1 RX1 7 Unused
2 RX2 8 Unused
3 RX3 9 TX4
4 RX4 10 TX3
5 Unused 11 TX2
6 Unused 12 TX1
This document including pictures and drawings contains
information about a new product during its early phase of
development. The information contained herein is given to
describe certain components and shall not be considered as a
guarantee of characteristics. Reflex Photonics reserves the right
to change the design or specifications of the product at any time
without notice. The material is provided as is and without any
warranties, including but not limited to warranties of non-
infringement, description and fitness for a particular purpose.
PRODUCT VARIANTS
LightABLE™ transceivers are available in several operating temperature variants
 Industrial Operating Temperature Range (-40 to +85°C)
 Extended Operating Temperature Range (-5 to +85°C)
 Commercial Operating Temperature Range ( 0 to +70°C)
Each temperature variant is available in mounting options of
 Surface mount: RoHS / Lead-Free solder balls
 Surface mount: Pb / Leaded solder balls
 Pluggable: RoHS / Lead-Free MegArray® connector
Please refer to the product Datasheet 970-00241 for detailed part number information or contact Reflex
Photonics for more information.
1-514-842-5179 or 1-408-715-1781 or by email at sales@reflexphotonics.com