LAQD-SR8A
400G QSFP-DD SR8 Optical Transceiver
Product Description
Link-all's LAQD-SR8A is a parallel 400GE Quad Small Form Factor Pluggable Double Density (QSFP-DD) SR8
optical module designed for optical communication applications. The optical module uses a 4-level pulse
amplitude modulation (PAM4) format. The optical module provides point-to-point 400 Gigabit Ethernet links over
eight pairs of multimode fiber, with a reach of up to 100 m for OM4 (MMF) and 70 m for OM3 (MMF).
It is compliant with QSFP-DD MSA standard and IEEE 802.3cm 400GBASE-SR8 standard and IEEE 802.3bs
400GAUI-8 standard. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP-
DD MSA.
Product Features
QSFP-DD MSA compliant
QSFP-DD CMIS4.0 management interface compliant
IEEE 802.3cm 400GBASE-SR8 standard compliant
IEEE 802.3bs 400GAUI-8 standard compliant
Digital diagnostic functions
8-channel full-duplex transceiver module
425 Gbps aggregate bit rate
Maximum link length of 70 m OM3, 100 m OM4 with FEC
Single MPO-16/APC receptacle
Maximum power dissipation < 10 W
Operating case temperature range 0°C to 70°C
Single 3.3 V power supply
RoHS 2 compliant
Applications
400G Ethernet
Data center network
Ordering Information
Part number:LAQD-SR8A
Description :400G QSFP-DD SR8 100M(FEC)/OM4 Transceiver DDM, MPO-16/APC Receptacle,
Commercial Temperature
Notes:
If you need more customized services, please contact us.
Function Descriptions
Absolute Maximum Ratings
It has to be noted that the operation in excess of any individual absolute maximum ratings might cause permanent
damage to this module.
Operating Environments
Electrical and optical characteristics below are defined under this operating environment, unless otherwise
specified.
Notes:
Initialization Flows: The Host Initialization Flows of CMIS Rev4.0 Standard Appendix C are recommended.
Optical Characteristics
Electrical Characteristics
Notes:
1. The module must stay within its declared power class.
2. DC common mode voltage is generated by the host. Specification includes effects of ground offset voltage.
Pin Descriptions
The QSFP-DD SR8 module edge connector consists of a single paddle card with 38 pads on the top and 38 pads
on the bottom for a total of 76 pads. The pads are defined in such a manner so as to accommodate insertion of a
QSFP module into a QSFP-DD receptacle.
Notes:
1. QSFP-DD uses common ground (GND) for all signals and supply (power). All are common within the
QSFP-DD module and all module voltages are referred to this potential unless otherwise noted. Connect
these directly to the host board signal-common ground plane.
2. VccRx, VccRx1, Vcc1, Vcc2, VccTx and VccTx1 shall be applied concurrently. VccRx, VccRx1, Vcc1,
Vcc2, VccTx and VccTx1 may be internally connected within the module in any combination. Each
connector Vcc pin is rated for a maximum current of 1000 mA.
EEPROM Definitions
Refer to CMIS Rev4.0 used for QSFP-DD.
Digital Diagnostic Monitoring Functions
Digital Diagnostic Management Interface (DDMI) is realized by I2C interface in compliance with CMIS 4.0.
diagnostic management functions are realized, and the data addresses are listed in the form below.
Notes:
1. Actual temperature test point is fixed on module case around laser array.
2. Full operating temperature range.
Alarm and Warning Thresholds
LAQD-SR8A supports alarms function, indicating the values of the preceding basic performance are lower or
higher than the thresholds.
Regulatory Compliance
Mechanical Specifications
Optical Interface
The QSFP-DD 400GE SR8 optical interface port shall be a male MPO-16 APC receptacle. The recommended
location and numbering of the optical ports for each of the media dependent interfaces is shown in Figure 11-1.
The transmitter and receiver optical lanes shall occupy the positions depicted in when looking into the MDI
receptacle with the connector keyway feature on top.
Notes:
The module uses MPO-16 APC receptacle. It may need every optical connector of the transmission link with APC
interface for lower optical reflectance.
ESD Design
Normal ESD precautions are required during the handling of this module. This transceiver is shipped in ESD
protective packaging. It should be removed from the packaging and otherwise handled in an ESD protected
environment utilizing standard grounded benches, floor mats, and wrist straps.
Safety Specification Design
Do not look into fiber end faces without eye protection using an optical meter (such as magnifier and microscope)
within 100 mm, unless you ensure that the laser output is disabled. When operating an optical meter, observe the
operation requirements.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
Notice
The information provided on these pages contains the product target specifications which are subject to
change without notice.
Check with Link-all Sales Office for product updates, changes in specifications, sample availability and
production release dates.
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