40GBASE QSFP+ IR4 4 CWDM wavelengths 1270 ~ 1330nm 2Km SMF 40G IR4 single-mode multi-rate optical transceiver compatible for QSFP-IR4-40G

40GBASE QSFP+ IR4  4 CWDM wavelengths 1270 ~ 1330nm 2Km SMF 40G IR4 single-mode multi-rate optical transceiver compatible for QSFP-IR4-40G

QSFP+ IR4100Gb/s QSFP28 IR4 Parallel Single Mode Optical TransceiverFeatures ● 4 independent full-duplex channels ● Up to 28Gb/s data rate per channel ● QSFP28 MSA compliant ● Compliant to IE

Product Details

QSFP+ IR4
100Gb/s QSFP28 IR4 Parallel Single Mode Optical Transceiver


Features
●  4 independent full-duplex channels
●  Up to 28Gb/s data rate per channel
●  QSFP28 MSA compliant
●  Compliant to IEEE 802.3bm 100GBASE PSM4
●  Up to 2km reach for G.652 SMF
●  Maximum power consumption 3.5W
●  Single +3.3V power supply
●  Operating case temperature: 0 to 70°C
●  RoHS-6 compliant

Applications
●  100G Ethernet links
●  Infiniband QDR and DDR interconnects
●  Datacenter and Enterprise networking


General Description
This product is a parallel 100Gb/s Quad Small Form-factor Pluggable (QSFP28) optical module. It provides increased port density and total system cost savings. The QSFP28 full-duplex optical module offers 4 independent transmit and receive channels, each capable of 25Gb/s operation for an aggregate data rate of 100Gb/s on 2km of single mode fiber.


An optical fiber ribbon cable with an MTP/MPO connector can be plugged into the QSFP28 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 an MSA-compliant 38-pin edge type connector. 


The module operates with single +3.3V power supply. LVCMOS/LVTTL global control signals, such as Module Present, Reset, Interrupt and Low Power Mode, are available with the modules. A 2-wire serial interface is available to send and receive more complex control signals, and to receive digital diagnostic information. Individual channels can be addressed and unused channels can be shut down for maximum design flexibility. 


The product is designed with form factor, optical/electrical connection and digital diagnostic interface according to the QSFP28 Multi-Source Agreement (MSA). It has been designed to meet the harshest external operating conditions including temperature, humidity and EMI interference. The module can be managed through the I2C two-wire serial interface.


2. Functional Description
This product is a QSFP28 parallel single mode optical transceiver with an MTP/MPO fiber ribbon connector. The transmitter module accepts electrical input signals compatible with Common Mode Logic (CML) levels. All input data signals are differential and internally terminated. The receiver module converts parallel optical input signals via a photo detector array into parallel electrical output signals. The receiver module outputs electrical signals are also voltage compatible with Common Mode Logic (CML) levels. All data signals are differential and support a data rates up to 25Gb/s per channel. Figure 1 shows the functional block diagram of this product.


A single +3.3V power supply is required to power up the module. Both power supply pins VccTx and VccRx are internally connected and should be applied concurrently. Per MSA the module offers 7 low speed hardware control pins (including the 2-wire serial interface): ModSelL, SCL, SDA, ResetL, LPMode, ModPrsL and IntL.


Module Select (ModSelL) is an input pin. When held low by the host, the module responds to 2-wire serial communication commands. The ModSelL allows the use of multiple QSFP28 modules on a single 2-wire interface bus – individual ModSelL lines for each QSFP28 module 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 QSFP28 memory map.

The ResetL pin enables a complete module reset, returning module 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 the module indicates a completion of the reset interrupt. The module 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.

Low Power Mode (LPMode) pin is used to set the maximum power consumption for the module in order to protect hosts that are not capable of cooling higher power modules, should such modules be accidentally inserted.

Module Present (ModPrsL) is a signal local to the host board which, in the absence of a module, is normally pulled up to the host Vcc. When a module 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 a module is present by setting ModPrsL to a "Low" state.

Interrupt (IntL) is an output pin. Low indicates a possible module 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 board.


Optical Characteristics
All parameters are specified under the recommended operating conditions with PRBS31 data pattern unless otherwise specified.

Parameter

Symbol

Min

Typical

Max

Units

Notes

Transmitter

Center Wavelength

λC

1295

1310

1325

nm


Side Mode Suppression Ratio

SMSR

30



dB


Total Average Launch Power

PT



8.0

dBm


Average Launch Power, each Lane

PAVG

-5.5


2.0

dBm


Optical Modulation Amplitude (OMA), each Lane

POMA

-3.5


2.2

dBm

1

Difference in Launch Power between any Two Lanes (OMA)

Ptx,diff



5

dB


Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP), each Lane


-4.3



dBm


TDP, each Lane

TDP



2.9

dB


Extinction Ratio

ER

3.5



dB


Relative Intensity Noise

RIN



-128

dB/Hz


Optical Return Loss Tolerance

TOL



20

dB


Transmitter Reflectance

RT



-12

dB


Average Launch Power OFF Transmitter, each Lane

Poff



-30

dBm


Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3}


{0.31, 0.4, 0.45, 0.34, 0.38, 0.4}


2

Receiver

Center Wavelength

λC

1295

1310

1325

nm


Damage Threshold, each Lane

THd

4.5



dBm

3

Average Receive Power, each Lane


-10.2


2.0

dBm


Receive Power (OMA), each Lane




2.2

dBm


Receiver Sensitivity (OMA), each Lane

SEN1



-9.0

dBm

4

Receiver Sensitivity (OMA), each Lane

SEN2



-12.0

dBm

5

Receiver Reflectance

RR



-26

dB


Difference in Receive Power between any Two Lanes (OMA)

Prx,diff



5.5

dB


LOS Assert

LOSA


-20


dBm


LOS Deassert

LOSD


-18


dBm


LOS Hysteresis

LOSH

0.5



dB


Receiver Electrical 3 dB upper Cutoff Frequency, each Lane

Fc



31

GHz



Notes:
1. Even if the TDP < 0.8 dB, the OMA min must exceed the minimum value specified here.
2. See Figure 4 below.
3. The receiver shall be able to tolerate, without damage, continuous exposure to a modulated optical input signal having this power level on one lane. The receiver does not have to operate correctly at this input power.
4. Measured at receiver input for BER = 1x10-12.
5. Measured at receiver input for BER = 5x10-5.

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