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The LAQ28-LR-xxyy is a low power consumption QSFP28 PAM4 transceiver with high performance up to
100G high speed telecom and data communications over 10km single mode fiber. It operates from a 3.3V DC power supply and is offered in the commercial temperature range. The module has 4 electrical lanes , each
capable of transmitting 26.56Gb/s NRZ data, 1 optical lane, capable of 106.25Gb/s PAM4 data over 10km
single mode fiber. It is fabricated with a rugged metal housing.
Product Features
Lane signaling rate 106.25Gb/s with PAM4
Up to 10km transmission on SMF
EML Laser and PIN receiver
4x25.78Gb/s with NRZ electrical interface (CAUI-4)
Support KP4 FEC inside the module
High speed I/O electrical interface
I2C interface with integrated Digital Diagnostic monitoring
QSFP28 MSA package with simplex LC connector
Single +3.3V power supply
Power consumption <3.5 W
Compliant to SFF-8636&SFF-8679 standard
Compliant to 100G Lambda MSA 100G-LR1 Optical Specifications
Complies with EU Directive 2015/863/EU
Operating case temperature: 0 to +70 °C
100GBASE-LR BIDI
Ordering information
| Part Number | Product Description |
| LAQ28-LR-2733 | 100G BIDI QSFP28 PAM4 1271nmTx/1331nmRx 10km(Inner-FEC) Commercial Temperature |
| LAQ28-LR-3327 | 100G BIDI QSFP28 PAM4 1331nmTx/1271nmRx 10km(Inner-FEC) Commercial Temperature |
| Parameter | Symbol | Min. | Typical | Max. | Unit | Notes |
| Storage Temperature | TS | -40 | +85 | °C | ||
| Supply Voltage | VCC | -0.5 | +4.0 | V | ||
| Operating Relative Humidity | RH | +85 | % |
| Parameter | Symbol | Min. | Typical | Max. | Unit | Notes |
| Operating Case Temperature | TC | 0 | +70 | °C | ||
| Power Supply Voltage | VCC | 3.13 | 3.3 | 3.47 | V | |
| Transmission Distance | TD | 10 | km | Over SMF |
Optical and Characteristics
| Parameter | Symbol | Min. | Typical | Max. | Unit | Notes |
| Transmitter | ||||||
| Center Wavelength | CW | 1264.5 | 1271 | 1277.5 | nm | |
| 1324.5 | 1331 | 1337.5 | nm | |||
| Signaling Rate | SR | 53.125 | GBd | |||
| Frequency Offset | Foffset | - 100 | 100 | ppm | ||
| Average Launch Power | PTX | - 1.4 | +4.5 | dBm | 1 | |
| Outer Optical Modulation Amplitude | OMA | +0.7 | +4.7 | dBm | 1 | |
Launch power in OMA minus TDECQ |
OMA-TDECQ |
-0.7 | dBm | ER>=4.5 dB |
||
| -0.6 | dBm | ER<4.5dB | ||||
| Transmitter and dispersion eye closure for PAM4 (TDECQ) (max) | TDECQ | +3.4 | dBm | |||
| Average Output Power (Laser Turn off) | Poff | -30 | dBm | |||
| Side Mode Suppression Ratio | SMSR | 30 | dB | |||
| Extinction Ratio | ER | 3.5 | dB | |||
| RIN_OMA | RIN | - 136 | dB/Hz | |||
| Transmitter reflectance | Tref | -26 | dB | |||
| Optical Return Loss Tolerance | ORLT | 15.6 | dB | |||
| Receiver | ||||||
| Center Wavelength | CW | 1324.5 | 1331 | 1337.5 | nm | |
| 1264.5 | 1271 | 1277.5 | nm | |||
| Damage threshold | Pdamage | +5.5 | dBm | 2 | ||
| Average Rx Power | PRx | -7.7 | +4.5 | dBm | 3 | |
| Receive power _OMAouter | POMA | 4.7 | dBm | |||
| Receiver sensitivity _OMAouter for TDECQ < 1.4 dB for 1.4 dB < TDECQ < 3.4 dB |
SEN _OMA |
-6.1 -7.5+TDECQ |
dBm |
4 |
||
| Reflectance | Ref | -26 | dB | |||
| Los Assert | LosA | -26 | dBm | |||
| Los De-Assert | LosDA | - 10 | dBm | |||
| Los Hysteresis | LosH | 0.5 | dB | |||
| Stressed receiver sensitivity _OMAouter | SRS | -4.1 | dBm | 5 | ||
| Conditions of stressed receiver sensitivity test : | ||||||
| Stressed eye closure for PAM4 (SECQ) | 3.4 | dB | 6 | |||
| SECQ- 10*lgCeq | 3.4 | dB | 6 | |||
Notes:
1. The optical power is launched into SMF.
2. The receiver shall be able to tolerate, without damage, continuous exposure to an optical input signal
having this average power level. The receiver does not have to operate correctly at this input power.
3. Average receive power, each lane (min) is informative and not the principal indicator of signal strength.
4. Measured with conformance test signal at TP3 using the test pattern PRBS31Q or scrambled idle for stressed receiver sensitivity for the BER= 2.4x10-4 .
5. Measured with conformance test signal at TP3 (see3. 11) for the BER specified in IEEE Std 802.3cu
6. Ceq is a coefficient defined in IEEE Std 802.3-2022 clause 121.8.5.3 which accounts for reference
equalizer noise enhancement.
Electrical Characteristics
| Parameter | Symbol | Min. | Typical | Max. | Unit | Notes |
| Transmitter (Module Input) | ||||||
| Input Differential Impedance | Rin | 100 | Ohm | |||
| Differential Data Input Amplitude | VIN,P-P | 900 | mVpp | |||
| Differential termination mismatch (max) | D-mismatch | 10 | % | |||
| DC common-mode input voltage | -0.3 | 2.8 | V | |||
| Transition time(20%~80%) | Tr Tf | 10 | ps | |||
| LPMode, Reset and ModSelL / Tx dis | VIL | -0.3 | 0.8 | V | ||
| LPMode, Reset and ModSelL / Tx dis | VIH | 2.0 | VCC+0.3 | V | ||
| Receiver (Module Output) | ||||||
| Output Differential Impedance | Rout | 100 | Ohm | |||
| Differential Data Output Amplitude | VOUTP-P | 900 | mVpp | |||
| Differential termination mismatch (max) | D-mismatch | 10 | % | |||
| Transition time, 20% to 80% | Tr Tf | 12 | ps | |||
| ModPrsL and IntL/ Rx los | VOL | 0 | 0.4 | V | ||
| ModPrsL and IntL/ Rx los | VOH | VCC-0.5 | VCC+0.3 | V | ||
Digital Diagnostics
| Parameter | Range | Accuracy | Unit | Calibration |
| Temperature | 0 to 70 | ±3 | ºC | Internal |
| Voltage | 0 to Vcc | ±3% | V | Internal |
| Tx Bias Current | 0 to 100 | ±10% | mA | Internal |
| Tx Output Power | - 1.4 to 4.5 | ±3 | dB | Internal |
| Rx Input Power | -7.7 to 4.5 | ±3 | dB | Internal |
| Parameter | Symbol | Min | Max | Unit | Calibration | Notes |
| Initialization time | t_init | 10 | s | Time from power on or hot plug until the module is fully functional. This time applies to Power Class 2 or higher modules when LPMode is pulled low by the host, and to all Power Class 1 modules. | Room Temperature |
Pin Diagram
Pin Definitions
| PIN | Logic | Symbol | Description | Plug Seq. |
Notes |
| 1 | GND | Ground | 1 | 1 | |
| 2 | CML-I | Tx2n | Transmitter Inverted Data Input | 3 | |
| 3 | CML-I | Tx2p | Transmitter Non-Inverted Data output | 3 | |
| 4 | GND | Ground | 1 | 1 | |
| 5 | CML-I | Tx4n | Transmitter Inverted Data Input | 3 | |
| 6 | CML-I | Tx4p | Transmitter Non-Inverted Data output | 3 | |
| 7 | GND | Ground | 1 | 1 | |
| 8 | LVTLL-I | ModSelL | Module Select | 3 | |
| 9 | LVTLL-I | ResetL | Module Reset | 3 | |
| 10 | VccRx | +3.3V Power Supply Receiver | 2 | 2 | |
| 11 | LVCMOS-I/O | SCL | 2-Wire Serial Interface Clock | 3 | |
| 12 | LVCMOS-I/O | SDA | 2-Wire Serial Interface Data | 3 | |
| 13 | GND | Ground | 1 | ||
| 14 | CML-O | Rx3p | Receiver Non-Inverted Data Output | 3 | |
| 15 | CML-O | Rx3n | Receiver Inverted Data Output | 3 | |
| 16 | GND | Ground | 1 | 1 | |
| 17 | CML-O | Rx1p | Receiver Non-Inverted Data Output | 3 | |
| 18 | CML-O | Rx1n | Receiver Inverted Data Output | 3 | |
| 19 | GND | Ground | 1 | 1 | |
| 20 | GND | Ground | 1 | 1 | |
| 21 | CML-O | Rx2n | Receiver Inverted Data Output | 3 | |
| 22 | CML-O | Rx2p | Receiver Non-Inverted Data Output | 3 | |
| 23 | GND | Ground | 1 | 1 | |
| 24 | CML-O | Rx4n | Receiver Inverted Data Output | 3 | 1 |
| 25 | CML-O | Rx4p | Receiver Non-Inverted Data Output | 3 | |
| 26 | GND | Ground | 1 | 1 | |
| 27 | LVTTL-O | ModPrsL | Module Present | 3 | |
| 28 | LVTTL-O | IntL/Rx_LOS | Interrupt/Rx_LOS | 3 | 3 |
| 29 | VccTx | +3.3 V Power Supply transmitter | 2 | 2 | |
| 30 | Vcc1 | +3.3 V Power Supply | 2 | 2 | |
| 31 | LVTTL-I | LPMode/TxDIS | Low Power Mode/Tx_Disable | 3 | 3 |
| 32 | GND | Ground | 1 | 1 | |
| 33 | CML-I | Tx3p | Transmitter Non-Inverted Data Input | 3 | |
| 34 | CML-I | Tx3n | Transmitter Inverted Data Output | 3 | |
| 35 | GND | Ground | 1 | 1 | |
| 36 | CML-I | Tx1p | Transmitter Non-Inverted Data Input | 3 | |
| 37 | CML-I | Tx1n | Transmitter Inverted Data Output | 3 | |
| 38 | GND | Ground | 1 | 1 |
Notes:
1. GND is the symbol for signal and supply (power) common for the QSFP28 module. All are common within the QSFP28 module and all module voltages are referenced to this potential unless otherwise noted. Connect
these directly to the host board signal-common ground plane.
2. Vcc Rx, Vcc1 and Vcc Tx are the receiver and transmitter power supplies and shall be applied concurrently. Requirements defined for the host side of the Host Edge Card Connector are listed in MSA. The connector pins are each rated for a maximum current of 1000 mA.
3. Two Multi-Purpose Pin for supporting Tx_DIS and Rx_LOS function in the 100G QSFP28 LR1 BIDI module.
Mechanical Diagram
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.
| Parameter | Notes | ||
| ESD of high-speed pins | 1KV | Human Body Model | |
| ESD of low-speed pins | 2KV | Human Body Model | |
| Air discharge during operation | 15KV | ||
| Direct contact discharges to the case | 8KV |
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.
Being a leading manufacturer of opical transceivers, we produce all kinds of optical transceivers from 1.25G to 800G, CWDM/DWDM/FWDM, Media Converters, PLC Spliters.. We have been in this field for about 15 years. Having attended many international fairs, we have been supplying to established companies worldwide. In general, we have rich experience in working with those big companies who value qualty much. So you may trust us on our product quality.
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