Mawonekedwe ◊ Kuthandizira 4x25GBASE-SR application ◊ Kugwirizana ndi QSFP28 MSA SFF-8636 ndi SFP28 MSA SFF-8431 ndi SFF- 8472 ◊ Mipikisano yambiri mpaka 25.78125Gbps pamseu uliwonse ◊ Kutumiza kwa 3m ◊ Mtunda wotumiza ◊ 3 Wotsika ◊ Kutumiza kwa 3m ◊ mtunda umodzi ◊0 mphamvu kugwiritsa ntchito ◊ zingwe za certification za UL (ngati mukufuna) ◊ Kutentha kwanyengo Yogulitsa: 0°C mpaka +70 °C ◊ Mapulogalamu ogwirizana ndi RoHS ◊ 4x25Gbe-SR ◊ Maulalo ena owoneka Kufotokozera: Mtheradi Wochuluka Kwambiri Magawo Table1- Absolute Symbol Maximum Ratings. Zofanana Max. Unit Notes Supply Voltage Vcc3 -0.5 - +3.6 V Kusungirako Kutentha Ts -10 - +70 °C Chinyezi Chogwiritsira ntchito RH +5 - +85 % 1 Zindikirani: 1 Palibe condensation Ikulimbikitsidwa Zogwiritsiridwa Ntchito Table 2- Zovomerezeka zogwiritsira ntchito Parameter Symbol Min. Zofanana Max. Unit Notes Operating Temperature TC 0 - +70 °C Power Supply Voltage Vcc 3.14 3.3 3.47 V Power Dissipation per QSFP28 Pd - - 2.5 W Power Dissipation pa SFP28 Pd - - 1.0 W 1 Bit Rate pa Lane BR 72512:5 Note BR 312512. 1 Pa Terminal Electrical Characteristics Table 3- Makhalidwe Amagetsi a QSFP28 Parameter Symbol Min. Lembani. Max. Ma Units Notes ModSelL Module Sankhani VOL 0 - 0.8 V Module Osasankha VOH 2.5 - VCC V LPMode Low Power Mode VIL 0 - 0.8 V Normal Operation VIH 2.5 - VCC +0.3 V ResetL Bwezerani VIL 0 - 0.8 V Normal Operation VIH + 0.5. V ModPrsL Normal Operation VOL 0 - 0.4 V IntL Kusokoneza VOL 0 - 0.4 V Normal Operation VoH 2.4 - VCC V Electrical Transmitter Characteristics Differential Date Input Swing Vin,PP 200 - 1600 mV Kutulutsa Kusiyanitsa Kusokoneza ZIN 90 100 100 110 Kusiyanitsa Kwamagetsi Swing Vout 200 - 800 mVPP Bit Error Rate BER E-12 1 Inpunt Differential Impedance ZD 90 100 110 Ω Zindikirani: 1 PRBS2^31-1@25.78125Gbps Table 4- Magetsi Makhalidwe a SFP28 Symbol Lembani. Max. Ma Units Notes Mawonekedwe a Magetsi Olowetsamo Swing Vin,PP 200 - 1600 mVPP Input Differential Impedance ZIN 90 100 110 Ω Tx_Fault Normal Operation VOL 0 - 0.8 V Transmitter Fault VOH 20 - Normal VOH 20. 0.8 v laser gwiritsani yih 2.0 - vcc + 0.3 v Signal VoH 2.0 - VCC V Pini yokonzekera Chithunzi 1, Pin View for QSFP28 Table 5- Pin Function Definitions for QSFP28 Pin Symbol Name/Tanthauzo Notes 1 GND Ground 1 2 Tx2n Transmitter Inverted Data Input 3 Tx2p Transmitter Gd Non-Inputter 1 5x4n Kulowetsa kwa Data Yopatsirana 6 Tx4p Transmitter Non-Inverted Data Input 7 GND Ground 1 8 ModSelL Module Sankhani 9 ResetL Module Reset 10 Vcc Rx +3.3V Power Supply Receiver 11 SCL 2-waya serial interface wotchi 11 SDA data 2 mawonekedwe Gawo la GND 114 Rx3p Receiver Kutulutsa Kwa data 15 Rx3n Receiver Inverted Data Linanena bungwe 16 GND Ground 1 17 Rx1p Receiver Non-Inverted Data Kutulutsa Zotulutsa 22 Rx2p Receiver Dongosolo Lopanda Inverted Data 23 GND Ground 1 24 Rx4n Receiver Inverted Data Litulutsidwe Pin Dzina lachizindikiro/Zolemba Zofotokozera 25 Rx4p Receiver Zosatembenuzidwa Zotulutsa 26 GND Ground 1 2 Module 27 VPSCCRS 1 Module 27 Tx + 3.3V Wotumiza magetsi 30 Vcc1 + 3.3V Mphamvu yamagetsi 31 LPMode Njira Yochepa ya Mphamvu 32 GND Ground 1 33 Tx3p Transmitter Yopanda Inverted Data Input 34 Tx3n Transmitter Inverted Data Input 35 GND Ground 1 36 Transmitter Input No1p Tx1n Transmitter Inverted Data Input 38 GND Ground 1 Chidziwitso: 1. Malo ozungulira ndi otalikirana ndi malo a chassis. Chithunzi 2, Pin View for SFP28 Table 6-Pin Function Definitions Pin Symbol Name/Tanthauzo Notes 1 VEET Module Transmitter Ground 1 2 TX_FAULT Module Transmitter Fault 2 3 TX_DISABLE Transmitter Disable; Izimitsa transmitter laser output 3 4 SDA 2-Wire Serial Interface Data Line (MOD-DEF2) 5 SCL 2-Wire Serial Interface Clock (MOD-DEF1) 6 MOD_ABS Module Kulibe, yolumikizidwa ndi VEET kapena VEER mu gawo 2 7 RS0 Rate Sankhani 0, mwasankha kuwongolera SFP + module wolandila 4 8 RX_LOS Receiver Loss ya Signal Indication (Mu FC yotchulidwa kuti Rx_LOS ndi mu Efaneti yotchulidwa kuti NOT Signal Detect) 2 9 RS1 Rate Sankhani 1, mwasankha imayang'anira SFP + module transmitter 4 Pin Symbol Name/Mafotokozedwe 10 VEER Module Receiver Ground 1 11 VEER Module Receiver 12 Ground RD-Receiver Inverted Data Output 13 RD+ Receiver Yopanda Kulowetsa Data 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 TD+ Transmitter 18 TD+ Transmitter Inverted Data Inverted TD Zolowetsa 20 VEET Module Transmitter Ground 1 Zindikirani: Zikhomo zapansi za module ndizotalikirana ndi kesi ya module. Zikhomo zidzakokedwa ndi 4.7K-10Kohms kumagetsi pakati pa 3.14V ndi 3.46V pa board board. Pini imakokedwa mpaka VCCT ndi 4.7K-10KΩ resistor mu module. Onani SFF-8472 Rev12.2 Table 10-2. Circuit Circuit Figure 3, Recommended Interface Circuit for QSFP28 Chithunzi 4, Recommended Host Board Power Supply Circuit for SFP28 Chithunzi 5, Recommended Interface Circuit for SFP28 Monitoring Specification Chithunzi 6, Memory, SFP7 Memory Mapu ya QFP28 Mechanical Unit mm Chithunzi 8, Mechanical Diagram Table 7- Chingwe Utali Wachingwe Utali L1 (Unit: m) Kulekerera (Unit: cm) ≤1.0 +5/-0 1.0＜L≤4.5 +15/-0 5≤5 +15/-0 4.5≤5. 30/-0 ＞14.5 +2%/-0 Table 8- Breakout Cable Nominal Length Total Length L1 (Unit: m) Breakout Point Yoyezedwa kuchokera ku SFPL2(Unit: m) 1 0.7 2 1.4 3 2 ≥5 3 Machenjezo Ogwiritsira Ntchito Njira Zodzitetezera: Chipangizochi ndichotheka kuwonongeka chifukwa cha electrostatic discharge (ESD). Malo opanda static akulimbikitsidwa kwambiri. Tsatirani malangizo molingana ndi njira zoyenera za ESD. Chitetezo cha Laser: Ma radiation opangidwa ndi zida za laser amatha kukhala owopsa kwa maso amunthu. Pewani kukhudzana ndi maso ndi ma radiation alunjika kapena osalunjika.