40G Q/4SFP+ Direct Attach Cable(DAC)
DAC● Compliant with SFF- 8436, SFF-8431, SFF-8432 and SFF-8472
● Up to 10. 3125Gbps data rate per channel
● Up to 7m transmission
● Operating temperature: 0~70℃
● Single 3.3V power supply
● Cost-effective copper solution
● Lowest total system power solution
● Lowest total system EMI solution
● Optimized design for Signal Integrity
● RoHS compliant
Definition:
QSFP+ Pin Function
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- | SCL | 2-wire serial interface clock |
12 | LVCMOS- | 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 |
SFP+ Pin Function
Pin | Logic | Symbol | Description |
1 | VeeT | Module Transmitter Ground | |
2 | LVTTL-O | Tx_Fault | Module Transmitter Fault |
3 | LVTTL-I | Tx_Disable | Transmitter disable; Turns off transmitter laser output |
4 | LVTTL-I/O | SDA | 2-wire Serial Interface Data Line (Same as MOD-DEF2 in INF-8074i) |
5 | LVTTL-I/O | SCL | 2-wire Serial Interface Clock (Same as MOD-DEF1 in INF-8074i) |
6 | Mod_ABS | Module Absent, connected to VeeT or VeeR in the module | |
7 | LVTTL-I | RS0 | Rate Select 0, optionally controls SFP+ module receiver |
8 | LVTTL-O | Rx_LOS | Receiver Loss of Signal Indication (In FC designated as Rx_LOS and in Ethernet designated as Signal Detect) |
9 | LVTTL-I | RS1 | Rate Select 1, optionally controls SFP+ module transmitter |
10 | VeeR | Module Receiver Ground | |
11 | VeeR | Module Receiver Ground | |
12 | CML-O | RD- | Receiver Inverted Data Output |
13 | CML-O | RD+ | Receiver Non-Inverted Data Output |
14 | VeeR | Module Receiver Ground | |
15 | VccR | Module Receiver 3.3 V Supply | |
16 | VccT | Module Transmitter 3.3 V Supply | |
17 | VeeT | Module Transmitter Ground | |
18 | CML-I | TD+ | Transmitter Non-Inverted Data Input |
19 | CML-I | TD- | Transmitter Inverted Data Input |
20 | VeeT | Module Transmitter Ground |
Characteristics:
General Product
Q/4SFP+ 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(QSFP+) |
Management Interface | Serial, I2C |
High Speed
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* |
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 |
Length (m) | Cable AWG |
1 | 30/28 |
2 | 30/28 |
3 | 30/28 |
4 | 28 |
5 | 28/24 |
6 | 24 |
7 | 24 |
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 |