Features
- 4 channels full-duplex transceiver modules
- Transmission data rate up to 10.5Gbps per channel
- 4 channels 850nm VCSEL array
- 4 channels PIN photo detector array
- Single MPO connector receptacle
- Hot Pluggable QSFP+ form factor
- Maximum link length of 100m on OM3 Multimode Fiber (MMF) and 150m on OM4 MMF
- Compatible with RoHS
- Single +3.3V power supply
- Real Time Digital Diagnostic Monitoring
- Operating case temperature: 0 to +70°C
Applications
- 40GBASE-SR4 Ethernet
- Switch, router and HBAs
- Infiniband transmission at 4 channels SDR, DDR and QDR
- High-performance Backplane Applications
- Proprietary Protocol Applications
Description
TheQSFP+ SR4 transceiversare high performance, cost effective modulessupporting datarate of 40Gbps and 100m transmission distance with MMF.
The transceiver consists of threesections:4 channels 850nm VCSEL array, 4 channels PIN photo detector array and MCU control unit. All modules satisfy class I laser safety requirements.
Thetransceivers are compatible with 40GBASE-SR4 of IEEE802.3ba standard and SFF-8436 specification.
Absolute Maximum Ratings
Parameter | Symbol | Min | Max | Unit |
Supply Voltage | Vcc | -0.5 | 4.5 | V |
Storage Temperature | Ts | -20 | +85 | °C |
Operating Humidity | - | 5 | 85 | % |
Recommended Operating Conditions
Parameter | Symbol | Min | Typical | Max | Unit |
Operating Case Temperature | Tc | 0 | | +70 | °C |
Power Supply Voltage | Vcc | 3.135 | 3.30 | 3.465 | V |
Power Dissipation | Pm | | | 1.5 | W |
Data Rate | | | 10.3 | 10.5 | Gbps |
Optical and Electrical Characteristics
Parameter | Symbol | Min | Typical | Max | Unit | Notes |
Transmitter |
Centre Wavelength | λc | 840 | 850 | 860 | nm | |
RMS spectral width | Δλ | - | - | 0.65 | nm | |
Average launch power, each lane | Pout | -7.6 | | 2.4 | dBm | |
Optical Modulation Amplitude, each lane | Poma | -5.6 | | 3 | dBm | |
Extinction Ratio | ER | 3.0 | | | dB | |
Average launch power of OFF transmitter,each lane | Poff | | | -30 | dBm | |
Data Input Swing Differential | VIN | 90 | | 1600 | mV | |
Input Differential Impedance | ZIN | 80 | 100 | 120 | Ω | |
Receiver |
Centre Wavelength | λc | 840 | | 860 | nm | |
Damage threshold | THd | 3.4 | | | dBm | |
Average power at receiver input,each lane | | -9.5 | | 2.4 | dBm | |
Optical Modulation Amplitude(OMA),each lane | | | | 3 | dBm | |
Stressed receiver sensitivity in OMA,each lane | | | | -5.4 | dBm | |
Receiver Sensitivity perChannel | SEN | | -13 | | dBm | |
LOS De-Assert | LOSD | | | -12 | dBm | |
LOS Assert | LOSA | -30 | | | dBm | |
LOS Hysteresis | | 0.5 | | | dB | |
Digital Diagnostic Memory Map
The transceivers provide serial ID memory contents and diagnostic information about the present operating conditionsby the 2-wireserial interface(SCL, SDA).
The digital diagnostic memory map specific data field defines as following.
Pin Descriptions
PIN | Logic | Symbol | Name/Description | Note |
1 | | GND | Ground | 1 |
2 | CML-I | Tx2n | Transmitter Inverted Data Input | |
3 | CML-I | Tx2p | Transmitter Non-Inverted Data output | |
4 | | GND | Ground | 1 |
5 | CML-I | Tx4n | Transmitter Inverted Data Input | |
6 | CML-I | Tx4p | Transmitter Non-Inverted Data output | |
7 | | GND | Ground | 1 |
8 | LVTLL-I | ModSelL | Module Select | |
9 | LVTLL-I | ResetL | Module Reset | |
10 | | VccRx | ﹢3.3V Power Supply Receiver | 2 |
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 | 1 |
17 | CML-O | Rx1p | Receiver Non-Inverted Data Output | |
18 | CML-O | Rx1n | Receiver Inverted Data Output | |
19 | | GND | Ground | 1 |
20 | | GND | Ground | 1 |
21 | CML-O | Rx2n | Receiver Inverted Data Output | |
22 | CML-O | Rx2p | Receiver Non-Inverted Data Output | |
23 | | GND | Ground | 1 |
24 | CML-O | Rx4n | Receiver Inverted Data Output | 1 |
25 | CML-O | Rx4p | Receiver Non-Inverted Data Output | |
26 | | GND | Ground | 1 |
27 | LVTTL-O | ModPrsL | Module Present | |
28 | LVTTL-O | IntL | Interrupt | |
29 | | VccTx | +3.3 V Power Supply transmitter | 2 |
30 | | Vcc1 | +3.3 V Power Supply | 2 |
31 | LVTTL-I | LPMode | Low Power Mode | |
32 | | GND | Ground | 1 |
33 | CML-I | Tx3p | Transmitter Non-Inverted Data Input | |
34 | CML-I | Tx3n | Transmitter Inverted Data Output | |
35 | | GND | Ground | 1 |
36 | CML-I | Tx1p | Transmitter Non-Inverted Data Input | |
37 | CML-I | Tx1n | Transmitter Inverted Data Output | |
38 | | GND | Ground | 1 |
Notes:
1. GND is the symbol for signal and supply (power) common for QSFP modules. All are common within the QSFP module and all module voltages are referenced to this potential unless otherwise noted. Connect these directly to the host board signal common ground plane.
2. VccRx, Vcc1 and VccTx are the receiver and transmitter power suppliers and shall be applied concurrently. Recommended host board power supply filtering is shown below. Vcc Rx, Vcc1 and Vcc Tx may be internally connected within the QSFP transceiver module in any combination. The connector pins are each rated for a maximum current of 500mA.
Ordering information
Model No. | Product Description |
QSFP-40G-SR4 | 40Gbps, 850nm,MPO, 100m, 0°C~+70°C, with DDM |