This product is a 400Gb/s Quad Small Form Factor Pluggable-double
density (QSFP-DD) optical
module designed for 2km optical communication applications. The
module converts 8 channels
of 50Gb/s (PAM4) electrical input data to 4 channels of parallel
optical signals, each capable of
100Gb/s operation for an aggregate data rate of 400Gb/s. Reversely,
on the receiver side, the
module converts 4 channels of parallel optical signals of 100Gb/s
each channel for an aggregate
data rate of 400Gb/s into 8 channels of 50Gb/s (PAM4) electrical
An optical fiber cable with an MTP/MPO-12 connector can be plugged
into the QSFP-DD DR4
module receptacle. Proper alignment is ensured by the guide pins
inside the receptacle. The
cable usually cannot be twisted for proper channel to channel
alignment. Electrical connection
is achieved through a QSFP-DD MSA-compliant edge type connector.
The product is designed with form factor, optical/electrical
connection and digital diagnostic
interface according to the QSFP-DD Multi-Source Agreement (MSA)
Type 2. It has been
designed to meet the harshest external operating conditions
including temperature, humidity
and EMI interference.
2. Functional Description
The module incorporates 4 parallel channels on 1310nm center
wavelength, operating at 100G
per channel. The transmitter path incorporates a quad channel EML
driver together with 4
parallel EMLs. On the receiver path, a PD array is connected with a
quad channel TIA to convert
the parallel 400Gb/s optical input into 4 channels of parallel
100Gb/s (PAM4) electrical signals.
A DSP basis gearbox is used to convert 8 channels of 25GBaud PAM4
signals into 4 channels of
50GBaud PAM4 signals and also an 8-channel retimer and FEC block
are integrated in this DSP.
The electrical interface is compliant with IEEE 802.3bs and QSFP-DD
MSA in the transmitting and
receiving directions, and the optical interface is compliant to
QSFP-DD MSA with MPO-12
A single +3.3V power supply is required to power up this product.
All the power supply pins are
internally connected and should be applied concurrently. As per MSA
specifications the module
offers seven low speed hardware control pins (including the 2-wire
serial interface): ModSelL,
SCL, SDA, ResetL, InitMode, ModPrsL and IntL.
Module Select (ModSelL) is an input pin. When held low by the host,
this product responds to
2-wire serial communication commands. The ModSelL allows the use of
this product on a single
2-wire interface bus – individual ModSelL lines must be used.
Serial Clock (SCL) and Serial Data (SDA) are required for the
2-wire serial bus communication
interface and enable the host to access the memory map.
The ResetL pin enables a complete reset, returning the settings to
their default state, when a
low level on the ResetL pin is held for longer than the minimum
pulse length. During the
execution of a reset the host shall disregard all status bits until
it indicates a completion of the
reset interrupt. The product indicates this by posting an IntL
(Interrupt) signal with the
Data_Not_Ready bit negated in the memory map. Note that on power up
(including hot insertion)
the module should post this completion of reset interrupt without
requiring a reset.
Initialize Mode (InitMode) is an input signal. It is pulled up to
Vcc in the QSFP-DD module. The
InitMode signal allows the host to define whether the QSFP-DD
module will initialize under host
software control (InitMode asserted High) or module hardware
control (InitMode deasserted
Low). Under host software control, the module shall remain in Low
Power Mode until software
enables the transition to High Power Mode, as defined in the
QSFP-DD Management Interface
Specification. Under hardware control (InitMode de-asserted Low),
the module may immediately
transition to High Power Mode after the management interface is
initialized. The host shall not
change the state of this signal while the module is present. In
legacy QSFP applications, this
signal is named LPMode. See SFF-8679 for LPMode signal description.
Module Present (ModPrsL) is a signal local to the host board which,
in the absence of a product,
is normally pulled up to the host Vcc. When the product is inserted
into the connector, it
completes the path to ground through a resistor on the host board
and asserts the signal.
ModPrsL then indicates its present by setting ModPrsL to a “Low”
Interrupt (IntL) is an output pin. “Low” indicates a possible
operational fault or a status critical
to the host system. The host identifies the source of the interrupt
using the 2-wire serial interface.
The IntL pin is an open collector output and must be pulled to the
Host Vcc voltage on the Host
This transceiver is specified as ESD threshold 1kV for high speed
data pins and 2kV for all other
electrical input pins, tested per MIL-STD-883, Method 3015.4
/JESD22-A114-A (HBM). However,
normal ESD precautions are still required during the handling of
this module. This transceiver is
shipped in ESD protective packaging. It should be removed from the
packaging and handled
only in an ESD protected environment.
This is a Class 1 Laser Product according to EN 60825-1:2014. This
product complies with 21 CFR
1040.10 and 1040.11 except for deviations pursuant to Laser Notice
No. 50, dated (June 24,
Caution: Use of controls or adjustments or performance of
procedures other than those
specified herein may result in hazardous radiation exposure.
一.OEM and ODM
OEM/ODM order is available.
We promise all the advertised optical transceivers are brand new
with new components and parts and absolutely never use old and
refurbished materials. All the optical transceivers have been
through functional test and aging test. We provide 3 years warranty
for all the optical transceivers from the date of shipment.
What we supply
We supply all kinds of compatible optical transceiver modules,
including SFP, GBIC, SFP+, XENPAK, X2 , XFP, BIDI,CWDM,DWDM and
other special transceiver modules. Our products are compatible with
most of brands. If more details, please contact us.
Q:Do you sell second-hand products?
A:No.All our products are brand new,we never use second-hand
Q:What payment terms do you accept?
A:T/T,Paypal,Western Union are acceptable.
Q:What are the shipping ways can you offer?
A:Our usual shipping ways are DHL,FedEX,TNT,UPS,EMS etc.It will take
Q:Do your products come with warranty?
A:Yes,We provide 3 years warranty for all our products from the date
Q:What devices can your products compatible with?
A:Our products are compatible with Mainstream switches.
Q:How to place an order?
A:1>Order details confirmed,please tell us the model and quantity
2>Proforma Invoice confirmed, the order will be arranged upon
receipt of your payment.
3>Confirm and ship the goods, then tracking number will be sent
to you promptly.
4>We will help to track your goods until you receive them
Shenzhen Hilink Technology Co., Ltd