General Description QSFP+ Direct Attach Cables are compliant with the SFF-8436 specifications. Various choices of wire gauge are available from 30 to 24 AWG with various choices of cable length (up to 7m). Features ◊ Compliant with SFF- 8436. ◊ Up to 10.3125Gbps data rate per channel ◊ Up to 7m transmission ◊ Operating temperature: -40℃ to +80℃ ◊ Single 3.3V power supply ◊ RoHS compliant Benefits ◊ Cost-effective copper solution ◊ Lowest total system power solution ◊ Lowest total system EMI solution ◊ Optimized design for Signal Integrity Applications ◊ 40G Ethernet Specification: Pin Function Definition Pin Logic Symbol Description 1 GND Ground 2 CML-I Tx2n Transmitter Inverted Data Input 3 CML-I Tx2p Transmitter Non-Inverted Data Input 4 GND Ground 5 CML-I Tx4n Transmitter Inverted Data Input 6 CML-I Tx4p Transmitter Non-Inverted Data Input 7 GND Ground 8 LVTTL-I ModSelL Module Select 9 LVTTL-I ResetL Module Reset 10 Vcc Rx +3.3V Power Supply Receiver 11 LVCMOS- I/O SCL 2-wire serial interface clock 12 LVCMOS- I/O SDA 2-wire serial interface data 13 GND Ground 14 CML-O Rx3p Receiver Non-Inverted Data Output 15 CML-O Rx3n Receiver Inverted Data Output 16 GND Ground 17 CML-O Rx1p Receiver Non-Inverted Data Output 18 CML-O Rx1n Receiver Inverted Data Output 19 GND Ground 20 GND Ground 21 CML-O Rx2n Receiver Inverted Data Output 22 CML-O Rx2p Receiver Non-Inverted Data Output 23 GND Ground 24 CML-O Rx4n Receiver Inverted Data Output 25 CML-O Rx4p Receiver Non-Inverted Data Output 26 GND Ground 27 LVTTL-O ModPrsL Module Present 28 LVTTL-O IntL Interrupt 29 Vcc Tx +3.3V Power supply transmitter 30 Vcc1 +3.3V Power supply 31 LVTTL-I LPMode Low Power Mode 32 GND Ground 33 CML-I Tx3p Transmitter Non-Inverted Data Input 34 CML-I Tx3n Transmitter Inverted Data Input 35 GND Ground 36 CML-I Tx1p Transmitter Non-Inverted Data Input 37 CML-I Tx1n Transmitter Inverted Data Input 38 GND Ground General Product Characteristics QSFP+ DAC Specifications Number of Lanes Tx & Rx Channel Data Rate 10.3125 Gbps Operating Temperature 0 to + 70°C Storage Temperature -40 to + 85°C Supply Voltage 3.3 V nominal Electrical Interface 38 pins edge connector Management Interface Serial, I2C High Speed Characteristics Parameter Symbol Min Typ Max Units Notes Differential Impedance Zd 90 100 110 Ω Differential Input Return Loss SDDXX <-12+2* SQRT (f) with f in GHz dB 0.01~4.1GHz <-6.3+13* Log10/(f/5.5) with f in GHz dB 4.1~11.1GHz Common Mode Output Return Loss SCCXX < -7+1.6*f with f in GHz dB 0.01~2.5GHz -3 dB 2.5~11.1GHz Difference Waveform Distortion Penalty dWDPc 6.75 dB VMA Loss L 4.4 dB VMA Loss to Crosstalk Ratio VCR 32.5 dB Mechanical Specifications The connector is compatible with the SFF-8436 specification. Length (m) Cable AWG 1 30 3 30 5 26 7 26 Regulatory Compliance Feature Test Method Performance Electrostatic Discharge (ESD) to the Electrical Pins MIL-STD-883C Method 3015.7 Class 1(>2000 Volts) Electromagnetic Interference(EMI) FCC Class B Compliant with Standards CENELEC EN55022 Class B CISPR22 ITE Class B RF Immunity(RFI) IEC61000-4-3 Typically Show no Measurable Effect from a 10V/m Field Swept from 80 to 1000MHz RoHS Compliance RoHS Directive 2011/65/EU and it's Amendment Directives 6/6 RoHS 6/6 compliant