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100Gbps QSFP28 to 4*SFP28 Active Optical Cable
Description
The active optical cables (AOC) that allows bi-directional 100Gbps to 25Gbps transmission suitable for high performance computing(HPC)clustering and other high-throughput data network, with advantages such as high speed, high density, low latency, low power consumption and light weight.
Features
> Supports 100G to 25G Ethernet interoperability
> Aggregate 4 discrete SFP28 25G channels into
> single parallel QSFP28 100G interface
> Maximum link length of 100m links on OM3 multimode fiber Or 150m links on OM4 multimode fiber
> Electrically hot-pluggable
> Electrical interface compliant to QSFP28 connector (SFF-8679&8436) and SFP28 connectors (SFF-8431&8432)
> Low profile connectors
> Low power consumption
> Bundle multi-mode fiber array
> 850nm VCSEL four array
> PIN diode four array
> Hot-Pluggable
> I2C management interface
> From 0 to 70 degree case temperature
> 3.3V power supply voltage
> Electrical 38-pin connector
Standard
> Compliant with IEEE 802.3ba-2010,Annex 86A for 100GBASE-SR4
> Compliant with InfiniBand EDR,FDR,QDR,DDR,SDR
> Compliant with QSFP MSA(SFF-8436)
> Compliant with SFP MSA(SFF-8431)
> RoHS Compliant:lead-free
Applications
> Network Switch Manufacturers supporting 100/25 G
> Server Manufacturers supporting 100/25 G
> Data Centers with 25G requirements with Aggregation Architectures
Performance Specifications
Absolute Maximum Ratings
These values represent the damage threshold of the module. Stress in excess of any of the individual Absolute Maximum Ratings can cause immediate catastrophic damage to the module even if all other parameters are within Recommended Operating Conditions.
Table.1 Absolute maximum ratings
Parameter | Conditions | Min | Max | Units |
Power supply voltage at 3.3V | -0.3 | 4.5 | V | |
Voltage on I/O pads | -0.3 | VDD+0.3 | V | |
Differential Input Swing | 1.5 | Vpp | ||
Storage temperature | Non-condensing | -40 | 85 | Celsius |
Powered case temperature range | Non-condensing | -5 | 70 | Celsius |
Relative Humidity | 5 | 85 | % | |
Static discharge voltage onhigh speed pins | Human body model | 500 | V | |
Static discharge voltage on other pins | Human body model | 2000 | V | |
Air discharge to QSFP case | EN61000-4-2 Criterion B Test | 15 | kV | |
Contact discharge to QSFP case | EN61000-4-2 Criterion B Test | 8 | kV |
Recommended Operating Conditions
Table.2 Recommended Operating Conditions
Parameter | Conditions | Min | Typ. | Max | Units |
Data rate per lane | 8B/10BCoding, 64B/66B Coding | 1 | 25 | 28 | Gbps |
3.3V Supply Voltage | 3.13 | 3.3 | 3.47 | V | |
Power supply noise including ripples | 1kHz to frequency of operation mersured at VCC_HOST | 50 | mVpp | ||
Case temperature | 0 | 35 | 70 | Celsius |
Transmitter Specification (Electrical)
Table.3 QSFP Transceiver Specification (Electrical)
Parameter | Condition | Min | Typ. | Max | Units |
Power Consumption | - | - | 1.0 | 1.8 | W |
Supply Current | - | - | 0.3 | 0.6 | mA |
Low Speed Electrical Specification
Table.4 Low Speed Electrical Specification
Parameter | Symbol | Min | Max. | Unit | Notes |
ResetL,ModSelL | VIL | -0.3 | 0.8 | V | ︱Iin︱≤125uA for 0V＜Vin，Vcc |
VIH | 2 | VCC+0.3 | V | ||
LPMode | Not connected inside QSFP | ||||
ModPraL | Internally terminated to GND | ||||
IntL | VOL | 0 | 0.4 | V | IOL=2mA |
VOH | VCC-0.5 | VCC+0.3 | V | ||
SCL,SDA | VOL | 0 | 0.4 | V | IOL(max)=3mA |
VOH | VCC-0.5 | VCC+0.3 | V | ||
VIL | -0.3 | VCC*0.3 | V | ||
VIH | VCC*0.7 | VCC+0.5 | V | ||
Capacitance for SCL and SDA I/O Pin | Ci | 14 | pF | ||
Total bus capacitice load for SCL and SDA | Cb | 100 | pF | 3.0kohm Pullup resistor,max | |
200 | pF | 1.6kohm Pullup resistor,max |
QSFP Transmitter Optical Specifications
Table.5 Transmitter Optical Specification
Parameter | Test Point | Min | Typ. | Max | Units | Conditions |
Center wavelength | TP2 | 840 | 850 | 860 | nm | |
RMS spectral width | TP2 | 0.45 | nm | Standard deviation | ||
Average launch power | TP2 | -2 | 4 | dBm | Each lane | |
Optical Modulation Amplitude | TP2 | -5.6 | 3 | dBm | Each lane | |
Difference in launch power between any two lanes(OMA) | TP2 | 4 | dB | |||
Peak power | TP2 | 0 | dBm | Each lane | ||
Launch power in OMA minus TDP | TP2 | -6.5 | dBm | Each lane | ||
Extinction ratio | TP2 | 3 | dB | |||
Optical return loss tolerance | TP2 | 12 | dB |
QSFP Receiver Optical Specification
Table.6 Receiver Optical Specification
Parameter | Test Point | Min | Typ. | Max | Units | Conditions |
Center wavelength | TP3 | 840 | 850 | 860 | nm | Each lane |
Damage Threshold | TP3 | 3.4 | dBm | Each lane | ||
Average power at receive input | TP3 | -9.5 | 4 | dBm | Each lane | |
Receiver Reflectance | TP3 | -12 | dB | |||
Optical Modulation Amplitude | TP3 | 3 | dBm | Each lane | ||
Stressed receiver sensitivity in OMA | TP3 | -5.4 | dBm | Each lane Measure with conformance test signal for BER 10e-12 | ||
Condition of Stressed receiver sensitivity | TP3 | |||||
Vertical Eye Closure Penalty | TP3 | 1.9 | dB | Each lane | ||
Stressed eye J2 Jitter | TP3 | 0.3 | UI | Each lane | ||
Stressed eye J9 Jitter | TP3 | 0.47 | UI | Each lane | ||
OMA of each aggressor lane | TP3 | -0.4 | dBm | |||
Peak Power | TP3 | 0 | dBm | Each lane | ||
LOS Assert | TP3 | -30 | dBm | |||
LOS De-assert OMA | TP3 | -7.5 | dBm | |||
LOS Hysteresis | TP3 | 0.5 | dB |
Recommended QSFP Host Board Power Supply Filtering
Figure 4: Recommended QSFP Host Board Power Supply Filtering
Figure 5: Recommended SFP+ Host Board Power Supply Filtering
SFP+ Transmitter Optical Specification
Table.7 SFP+ Transmitter Optical Specification
Parameter | Symbol | Min | Typ. | Max | Units | Note |
Center wavelength | λ | 840 | 850 | 860 | nm | |
RMS spectral width | λRMS | 4 | nm | |||
Average Optical Power | Pavg | -7.3 | -1 | dBm | 1 | |
Optical Power OMA | Poma | -1.5 | dBm | |||
Laser Off Power | Poff | -30 | dBm | |||
Extinction Ratio | ER | 3.5 | dB | |||
Transmitter Dispersion Penalty | TDP | 3.9 | dB | 2 | ||
Relative Intensity Noise | Rin | -128 | dB/HZ | 3 | ||
Optical Return Loss Tolerance | TP3 | 20 | dB |
SFP+ Receiver Optical Specification
Table.8 SFP+ Receiver Optical Specification
Parameter | Symbol | Min | Typ. | Max | Units | Note |
Center wavelength | λ | 840 | 850 | 860 | nm | |
Receiver Sensitivity(OMA) | Sen | -11.1 | nm | |||
Stressed Sensitivity(OMA) | SenST | -7.5 | dBm | |||
Los Assert | LOSA | -30 | dBm | |||
Los Dessert | LOSD | -12 | dBm | |||
Los Hysteresis | LOSH | 0.5 | dB | |||
Overload | Sat | 0 | dB | |||
Receiver Reflectance | Rrx | -12 | dB/HZ |
QSFP28 Pin Definitions
Table.9 QSFP28 Pin Definitions
Logic | Symbol | Signal | Description | |
1 | GND | Signal Ground | Ground | |
2 | CML-I | Tx2n | Tx2n | Transmitter Inverted Date Input.AC coupled |
3 | CML-I | Tx2p | Tx2p | Transmitter Non_Inverted Date Input.AC coupled |
4 | GND | Signal Ground | Ground | |
5 | CML-I | Tx4n | Tx4n | Transmitter Inverted Date Input.AC coupled |
6 | CML-I | Tx4p | Tx4p | Transmitter Non_Inverted Date Input.AC coupled |
7 | GND | Signal Ground | Ground | |
8 | LVTTL-I | ModSelL | ModSelL | Module Select pin.Selected when held low by the host. |
9 | LVTTL-I | ResetL | LPMode_Reset | Module Reset.A"low" pulse induces a reset on the module. |
10 | Vcc Rx | Vcc Rx | +3.3V Power Supply Receiver | |
11 | LVCMOS-I/O | SCL | SCL | 2-wire serial interface |
12 | LVCMOS-I/O | SDA | SDA | |
13 | GND | Signal Ground | Ground | |
14 | CML-O | Rx3p | Rx3p | Receiver Non_Inverted Date Input.AC coupled |
15 | CML-O | Rx3n | Rx3n | Receiver Inverted Date Input.AC coupled |
16 | GND | Signal Ground | Ground | |
17 | CML-O | Rx1p | Rx1p | Receiver Non_Inverted Date Input.AC coupled |
18 | CML-O | Rx1n | Rx1n | Receiver Inverted Date Input.AC coupled |
19 | GND | Signal Ground | Ground | |
20 | GND | Signal Ground | Ground | |
21 | CML-O | Rx2n | Rx2n | Receiver Inverted Date Input.AC coupled |
22 | CML-O | Rx2p | Rx2p | Receiver Non_Inverted Date Input.AC coupled |
23 | GND | Signal Ground | Ground | |
24 | CML-O | Rx4n | Rx4n | Receiver Inverted Date Input.AC coupled |
25 | CML-O | Rx4p | Rx4p | Receiver Non_Inverted Date Input.AC coupled |
26 | GND | Signal Ground | Ground | |
27 | LVTTL-O | ModPrsL | ModPrsL | Module Present pin.Internally grounded inside the module. |
28 | LVTTL-O | IntL | IntL | Interrupt by the QSFP module."Low"indicates an Alarm/Warning. |
29 | Vcc Tx | Vcc Tx | +3.3V Power Supply Transmitter | |
30 | Vccl | Vccl | +3.3V Power Supply | |
31 | LVTTL-I | LPMode | LPMode | Low Power Mode |
32 | GND | Signal Ground | Ground | |
33 | CML-I | Tx3p | Tx3p | Transmitter Non_Inverted Date Input.AC coupled |
34 | CML-I | Tx3n | Tx3n | Transmitter Inverted Date Input.AC coupled |
35 | GND | Signal Ground | Ground | |
36 | CML-I | Tx1p | Tx1p | Transmitter Non_Inverted Date Input.AC coupled |
37 | CML-I | Tx1n | Tx1n | Transmitter Inverted Date Input.AC coupled |
38 | GND | Signal Ground | Ground | |
Housing | Chassis Ground |
SFP28 Pin Definitions
Table.10 SFP28 Pin Definitions
PIN | Description | Remarks |
1 | Transmitter ground (common with receiver ground) | Circuit ground is isolated from chassis ground |
2 | Transmitter Fault. Not supported | |
3 | Transmitter Disable. Laser output disable on high or open | Disabled: TDIS>2V or open Enabled: TDIS<0.8V |
4 | 2-wire Serial Interface Data Line | Should Be pulled up with 4.7k – 10k ohm on host board to a voltage between 2V and 3.6V |
5 | 2-wire Serial Interface Clock Line | |
6 | Module Absent. Grounded within the module. | |
7 | No connection required | |
8 | Loss of Signal indication. Logic 0 indicates normal operation | LOS is open collector output |
9 | No connection required | |
10 | Receiver ground (common with transmitter ground) | Circuit ground is isolated from chassis ground |
11 | Receiver ground (common with transmitter ground) | |
12 | Receiver Inverted DATA out. AC coupled | |
13 | Receiver Non-inverted DATA out. AC coupled | |
14 | Receiver ground (common with transmitter ground) | Circuit ground is isolated from chassis ground |
15 | Receiver power supply | |
16 | Transmitter power supply | |
17 | Transmitter ground (common with receiver ground) | Circuit ground is isolated from chassis ground |
18 | Transmitter Non-Inverted DATA in. AC coupled | |
19 | Transmitter Inverted DATA in. AC coupled | |
20 | Transmitter ground (common with receiver ground) | Circuit ground is isolated from chassis ground |
Mechanical Specifications
Table.11 Mechanical Specifications
Parameter | Min | Max. | Unit | Notes |
Cable bend radius(Installation) | 30 | mm | ||
Cable bend radius(Operating) | 60 | |||
QSFP module insertion | 40 | N | ||
QSFP module extraction | 30 | N | ||
Retention Load | 100 | N | No damage to module below 100N | |
Insertion/removal cycles | 200 | Cycles | Number of cycles for an individual module |
Functional Block Diagram of the QSFP Module
Figure 6:Functional Block Diagram of the QSFP Module
Overview of Cable Assembly
Cable length(m) C | A length | B length |
Cable length(m) C=A+B | ||
A and B lengths may be available upon request | ||
Figure 7:Overview of Cable Assembly
Order Information
P/N | Description |
Q4SFP28-AxxM | 100G QSFP28 to 4*SFP28 AOC Cable OM2/OM3/OM4, xx=0~100meter |
