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DAC (Direct Attach Cable)/


Up to 10.3125Gbps data rate per channel

Up to 7m transmission

Hot-pluggable QSFP+ 38 PIN footprint

Compatible to SFF-8436

Single 3.3V power supply

Temperature Range: 0~ 70 °C

RoHS compliant

  • Product Detail
  • Applications
  • Pin Descriptions
  • Mechanical Dimensions

HX40-QSFP+-DAC1 are compliant with the SFF-8436 specifications. Various choices of wire gauge are available from 30 to 26 AWG with various choices of cable length (up to 7m).

QSFP+ DAC Specifications
Number of LanesTx & Rx
Channel Data Rate10.3125 Gbps
Operating Temperature0 to + 70°C
Storage Temperature-40 to + 85°C
Supply Voltage3.3 V nominal
Electrical Interface38 pins edge connector
Management InterfaceSerial, I2C

High Speed Characteristics

Differential ImpedanceZd90100110Ω
Differential Input Return LossSDDXX<-12+2* SQRT (f) with f in GHzdB0.01~4.1GHz
<-6.3+13*Log10/(f/5.5) with f in GHzdB4.1~11.1GHz
Common Mode Output Return LossSCCXX< -7+1.6*f with f in GHzdB0.01~2.5GHz
Difference Waveform Distortion PenaltydWDPc6.75dB
VMA LossL4.4dB
VMA Loss to Crosstalk RatioVCR32.5dB

Regulatory Compliance

FeatureTest MethodPerformance
Electrostatic Discharge (ESD) to the Electrical PinsMIL-STD-883C Method 3015.7Class 1(>2000 Volts)
Electromagnetic Interference(EMI)FCC Class BCompliant with Standards
CENELEC EN55022 Class B
RF Immunity(RFI)IEC61000-4-3Typically Show no Measurable Effect from a 10V/m Field Swept from 80 to 1000MHz
RoHS ComplianceRoHS Directive 2011/65/EU and it’s Amendment Directives 6/6RoHS 6/6 compliant
  • Low EMI radiation switches, servers and routers
  • Data center networks
  • Storage area networks
  • High performance computing
  • Telecommunication and wireless infrastructure
  • Medical diagnostics and networking
  • Test and measurement equipment

    Recommended Operation Condition of 40G QSFP+ Direct Attach Cable

    Operating Case TemperatureTopc070degC
    Storage TemperatureTst-4085degC
    Relative Humidity (non-condensation)RS3560%
    Supply VoltageVCC33.1353.465V
    Voltage on LVTTL InputVilvttl-0.3VCC3  +0.2V
    Power Supply CurrentICC3 15mA
    Total Power ConsumptionPd0.05W

    Notes: Stress or conditions exceed the above range may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not applied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The connector is compatible with the SFF-8436 specification.



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