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
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 | Typical | Max | Unit | Note |
Differential Impedance | TDR | 90 | 100 | 110 | Ώ | |
Insertion loss | SDD21 | -17.04 | dB | At 5.15625 GHz | ||
Differential Return Loss | SDD11 SDD22 | See 1 | dB | At 0.05 to 4.1 GHz | ||
See 2 | dB | At 4.1 to 11.1 GHz | ||||
Differential to common-mode return loss | SCD11 SCD22 | -10 | dB | At 0.2 to 11.1 GHz | ||
Common-mode to common-mode output return loss | SCC11 SCC22 | -3 | dB | At 0.01 to 11.1 GHz | ||
Notes: 1. Reflection Coefficient given by equation SDD11(dB) < -12 + 2 × SQRT(f ), with f in GHz 2. Reflection Coefficient given by equation SDD11(dB) < -6.3 + 13 × log10(f/5.5), with f in GHz
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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 |
