Features ◊ Support 100GBASE-SR4/EDR application ◊ Compliant to QSFP28 Electrical MSA SFF-8636 ◊ Multi rate of up to 25.78125Gbps ◊ Transmission distance up to 100m ◊ +3.3V single power supply ◊ Low power consumption ◊ Operating  temp Commercial: 0°C to +70 °C ◊ RoHS compliant ◊ UL certification cables (optional) Applications ◊ 100GBASE-SR4 at 25.78125Gbps per lane ◊ Infini Band QDR, EDR ◊ Other optical links Specification: Absolute Maximum Ratings Table1- Absolute Maximum Ratings Parameter Symbol Min. Typical Max. Unit Notes Supply Voltage Vcc3 -0.5 - +3.6 V   Storage Temperature Ts -10 - +70 °C   Operating Humidity RH +5 - +85 % 1 Note: 1 No condensation Recommended Operating Conditions Table 2- Recommended operating Conditions Parameter Symbol Min. Typical Max. Unit Notes Operating Case Temperature TC 0 - +70 °C   Power Supply Voltage Vcc 3.14 3.3 3.47 V   Power Dissipation Pd - - 2.5 W 1 Bit Rate BR 10.3125 25.78125 - Gbps   Note: 1 Per terminal Electrical Characteristics Table 3- Electrical Characteristics Parameter Symbol Min. Typ. Max. Units Notes  ModSelL Module Select VOL 0 - 0.8 V   Module Unselect VOH 2.5 - VCC V    LPMode Low Power Mode VIL 0 - 0.8 V   Normal Operation VIH 2.5 - VCC+0.3 V    ResetL Reset VIL 0 - 0.8 V   Normal Operation VIH 2.5 - VCC+0.3 V   ModPrsL Normal Operation VOL 0 - 0.4 V    IntL Interrupt VOL 0 - 0.4 V   Normal Operation VoH 2.4 - VCC V                                Electrical transmitter Characteristics Differential Date Input Swing Vin，p-p 200 - 1600 mV   Output Differential Impedance Zin 90 100 110 Ω   Electrical Receiver Characteristics Differential Data Output Swing Vout 200 - 800 mV   Bit Error Rate BER - - E-12 - 1 Input Differential Impedance ZD 90 100 110 Ω   Note: 1 PRBS2^31-1@25.78125Gbps Recommended Interface Circuit   Figure 1, Recommended Interface Pin arrangement   Figure 2, Pin View  Table 4-Pin Function Definitions Pin Symbol Name/Description Notes 1 GND Ground 1 2 Tx2n Transmitter Inverted Data Input   3 Tx2p Transmitter Non-Inverted Data Input   4 GND Ground 1 5 Tx4n Transmitter Inverted Data Input   6 Tx4p Transmitter Non-Inverted Data Input   7 GND Ground 1 8 ModSelL Module Select   9 ResetL Module Reset   10 Vcc Rx +3.3V Power Supply Receiver   11 SCL 2-wire serial interface clock   12 SDA 2-wire serial interface data   13 GND Ground 1 14 Rx3p Receiver Non-Inverted Data Output   15 Rx3n Receiver Inverted Data Output   16 GND Ground 1 17 Rx1p Receiver Non-Inverted Data Output   18 Rx1n Receiver Inverted Data Output   19 GND Ground 1 20 GND Ground 1 21 Rx2n Receiver Inverted Data Output   22 Rx2p Receiver Non-Inverted Data Output   23 GND Ground 1 24 Rx4n Receiver Inverted Data Output     Pin Symbol Name/Description Notes 25 Rx4p Receiver Non-Inverted Data Output   26 GND Ground 1 27 ModPrsL Module Present   28 IntL Interrupt   29 Vcc Tx +3.3V Power supply transmitter   30 Vcc1 +3.3V Power supply   31 LPMode Low Power Mode   32 GND Ground 1 33 Tx3p Transmitter Non-Inverted Data Input   34 Tx3n Transmitter Inverted Data Input   35 GND Ground 1 36 Tx1p Transmitter Non-Inverted Data Input   37 Tx1n Transmitter Inverted Data Input   38 GND Ground 1 Note: 1. Circuit ground is internally isolated from chassis ground. Monitoring Specification Figure 3, Memory Map Mechanical Design Diagram Unit mm Table 5- Cable Length Cable Length  L（Unit: m） Tolerant（Unit: cm） ≤1.0 +5/-0 1.0＜L≤4.5 +15/-0 4.5＜L≤14.5 +30/-0 ＞14.5 +2%/-0 Warnings Handling Precautions: This device is susceptible to damage as a result of electrostatic discharge (ESD). A static free environment is highly recommended. Follow guidelines according to proper ESD procedures. Laser Safety: Radiation emitted by laser devices can be dangerous to human eyes. Avoid eye exposure to direct or indirect radiation.