Nta ◊ Kev them nyiaj yug 4x25GBASE-SR daim ntawv thov ◊ Ua raws li QSFP28 MSA SFF-8636 thiab SFP28 MSA SFF-8431 thiab SFF- 8472 ◊ Ntau tus nqi txog li 25.78125Gbps ib txoj kab ◊ Kev xa tawm hluav taws xob tsawg txog 3m ◊ 5. zog noj ◊ UL daim ntawv pov thawj cables (yeem) ◊ Kev khiav hauj lwm temp Commercial: 0°C txog +70°C ◊ RoHS raws daim ntawv thov ◊ 4x25Gbe-SR ◊ Lwm yam kev sib txuas kho qhov muag Specification: Txaus siab tshaj qhov ntsuas Table1- Qhov siab tshaj qhov ntsuas qhov ntsuas. Hom Max. Unit Notes Supply Voltage Vcc3 -0.5 - +3.6 V Storage Temperature Ts -10 - +70 °C Kev Ua Haujlwm Humidity RH +5 - +85 % 1 Lus Cim: 1 Tsis muaj condensation pom zoo ua haujlwm Cov xwm txheej Table 2- Pom zoo ua haujlwm Cov xwm txheej Parameter Cov cim Min. Hom Max. Unit Notes Kev khiav hauj lwm kub TC 0 - +70 °C Fais fab mov Voltage Vcc 3.14 3.3 3.47 V Fais fab Dissipation ib QSFP28 Pd - - 2.5 W Fais fab Dissipation ib SFP28 Pd - - 1.0 W 1 ntsis tus nqi ib txoj kab BR5 10.312. Ib Terminal Hluav Taws Xob Cov yam ntxwv Table 3- Cov yam ntxwv hluav taws xob rau QSFP28 Parameter Cim Min. Ntaus. Max. Units Notes ModSelL Module Xaiv VOL 0 - 0.8 V Module Unselect VOH 2.5 - VCC V LPMode Tsawg Fais Fab Hom VIL 0 - 0.8 V Ib txwm ua haujlwm VIH 2.5 - VCC + 0.3 V ResetL Rov Pib dua VIL 0 - 0.8 V Li qub5 VIH + 2. V ModPrsL Ib txwm ua haujlwm VOL 0 - 0.4 V IntL cuam tshuam VOL 0 - 0.4 V Ib txwm ua haujlwm VoH 2.4 - VCC V Hluav Taws Xob Transmitter yam ntxwv Differential Hnub Input Viav Vias Vin, PP 200 - 1600 mV Output Differential Impedance ZIN 90 100 110 Ω Cov Hluav Taws Xob Tawm Tawm 0 Ω Cov Khoom Siv Hluav Taws Xob 800 mVPP Bit Error Rate BER E-12 1 Input Differential Impedance ZD 90 100 110 Ω Lus Cim: 1 PRBS2^31-1@25.78125Gbps Table 4- Cov yam ntxwv hluav taws xob rau SFP28 Parameter Parameter Min. Ntaus. Max. Units Notes Electrical Transmitter Yam ntxwv Differential Data Input Viav Vin, PP 200 - 1600 mVPP Input Differential Impedance ZIN 90 100 110 Ω Tx_Fault Ib txwm ua haujlwm VOL 0 - 0.8 V Transmitter Fault VOH 2.0 - VCC V Tx_Disable . 2.0 - VCC+0.3 V Hluav Taws Xob Txais Cov Yam Ntxim Saib Ntxim Ua Nthuav Tawm Hnub Tawm Vout 400 - 800 mV ntsis yuam kev tus nqi BER - - E-12 - Cov zis qhov sib txawv impedance ZD 90 100 110 Ω Rx_LOS Lub Sijhawm Ua Haujlwm VOL 0 - 0.8 CC V2 Los. Pin arrangement Daim duab 1, Pin View for QSFP28 Table 5- Pin Function Definitions for QSFP28 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 -Inverted Data Input 7 GND Ground 1 8 ModSelL Module Xaiv 9 ResetL Module Pib dua 10 Vcc Rx +3.3V Fais Fab Kev Txais Txais 11 SCL 2-xaim serial interface moos 12 SDA 2-xaim serial interface cov ntaub ntawv 13 GND Ground 1 14 Rx3p Txais Cov Ntaub Ntawv Tsis-Inverted Rx 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 GND2 PIB Round 1 Output Data Cim Lub Npe/Kev piav qhia Cov Lus Cim 25 Rx4p Receiver Non-Inverted Data Output 26 GND Ground 1 27 ModPrsL Module Present 28 IntL Interrupt 29 Vcc Tx +3.3V Fais Fab Transmitter 30 Vcc1 +3.3V Fais Fab 31 LPMode Low Power Mode 32 GND3 Ground Transmitter Tsis-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 Ceeb toom: 1. Circuit Court hauv av yog nyob rau hauv cais tawm ntawm chassis hauv av. Daim duab 2, Pin View for SFP28 Table 6-Pin Function Definitions Pin Symbol Name/Description Notes 1 VEET Module Transmitter Ground 1 2 TX_FAULT Module Transmitter Fault 2 3 TX_DISABLE Transmitter Disable; Tig tawm transmitter laser tso zis 3 4 SDA 2-Wire Serial Interface Cov Ntaub Ntawv Kab (MOD-DEF2) 5 SCL 2-Wire Serial Interface Clock (MOD-DEF1) 6 MOD_ABS Module Tsis Muaj, txuas nrog VEET lossis VEER hauv module 2 7 RS0 Rate Xaiv 0, xaiv yeem tswj hwm SFP + module txais 4 8 RX_LOS Txais Poob qhov taw qhia (Nyob rau hauv FC xaiv raws li Rx_LOS thiab hauv Ethernet xaiv raws li NOT Signal Detect) 2 9 RS1 Rate Xaiv 1, optionally tswj SFP + module transmitter 4 Pin Symbol Lub Npe / Daim Ntawv Qhia 10 VEER Module Receiver Ground 1 11 VEER Ground1 Receiver 12 RD- Receiver Inverted Data Output 13 RD+ Receiver Non-Inverted Data Output 14 VEER Module Receiver Ground 1 15 VCCR Module Receiver 3.3 V Supply 16 VCCT Module Transmitter 3.3 V Supply 17 VEET Module Transmitter Ground 1 18 TD1 verted Data Transmitter Tsis-Inputter 20 VEET Module Transmitter Ground 1 Lus Cim: Lub module hauv av pins raug cais tawm ntawm cov ntaub ntawv module. Cov pins yuav tsum rub nrog 4.7K-10Kohms rau qhov hluav taws xob ntawm 3.14V thiab 3.46V ntawm lub rooj tsavxwm. Tus pin yog rub mus rau VCCT nrog 4.7K-10KΩ resistor hauv lub module. Saib SFF-8472 Rev12.2 Table 10-2. Pom zoo Circuit Court daim duab 3, pom zoo Interface Circuit Court rau QSFP28 Daim duab 4, pom zoo Host Board fais fab mov Circuit Court rau SFP28 daim duab 5, pom zoo Interface Circuit Court rau SFP28 xyuas Specification Daim duab 6, Memory Map rau QSFP28 Daim duab 7, Memorychan Unit FP Daim duab 7 , Mechanical Diagram Table 7- Cable Length Cable Ntev L1 (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 Table 8- Breakout Cable Nominal Length Tag Nrho L1 (Unit: m) Breakout Point Ntsuas los ntawm SFPL2(Unit: m) 1 0.7 2 1.4 3 2 ≥5 3 Kev Ceeb Toom Kev Tiv Thaiv Kev Tiv Thaiv: Cov cuab yeej no raug kev puas tsuaj los ntawm electrostatic paug (ESD). Ib puag ncig dawb zoo li qub tau pom zoo. Ua raws li cov lus qhia raws li cov txheej txheem ESD. Laser Kev Nyab Xeeb: Cov hluav taws xob tawm los ntawm cov khoom siv laser tuaj yeem ua rau muaj kev phom sij rau tib neeg lub qhov muag. Tsis txhob pom qhov muag raug hluav taws xob ncaj qha lossis tsis ncaj qha.