40Gb/s QSFP+ eSR4 OM3 Multimode Fiber 300 Meter Optical Transceiver
Module
Features
●Up to 300m on OM3 Multimode Fiber (MMF)
●Four-channel full-duplex transceiver modules
●Transmission data rate up to 11.3Gbit/s per channel
●Low power consumption <1.5W
●Operating case temperature 0°C to +70°C
●3.3V power supply voltage
●RoHS 6 compliant
●Hot Pluggable QSFP form factor
●MPO connector receptacle
●Built-in digital diagnostic function
Applications
●InfiniBand QDR, DDR and SDR
●Proprietary High Speed Interconnections
●Data center
Description
The E-link LNK-QSFP-ISR4-100M is a Four-Channel, Pluggable,
Parallel, Fiber-Optic QSFP+ Transceiver for InfiniBand
QDR/DDR/SDR,12G/10G/8G/4G/2G fiber channel, PCIe and SAS
Applications. The QSFP full-duplex optical module offers 4
independent transmit and receive channels, each capable of 11.3Gbps
operation for an aggregate data rate of 45.2Gbps 300m using OM3
fiber. These modules are designed to operate over multimode fiber
systems using 850nmVCSEL laser array.An optical fiber ribbon cable
with an MPO/MTPTM connector can be plugged into the QSFP module receptacle. QSFP+
eSR4 is one kind of parallel transceiver which provides increased
port density and total system cost savings.
Absolute Maximum Ratings
The operation in excess of any absolute maximum ratings might cause
permanent damage to this module.
| Parameter | Symbol | Min | Max | Unit | Note |
| Storage Temperature | TST | -40 | 85 | degC | |
| Relative Humidity(non-condensing) | RH | 0 | 85 | % | |
| Operating Case Temperature | TOPC | 0 | 70 | degC | |
| Supply Voltage | VCC | -0.3 | 3.6 | V | |
| Input Voltage | Vin | -0.3 | Vcc+0.3 | V | |
Recommended Operating Conditions and Supply Requirements
| Parameter | Symbol | Min | Typical | Max | Unit |
| Operating Case Temperature | TOPC | 0 | | 70 | degC |
| Power Supply Voltage | VCC | 3.13 | 3.3 | 3.47 | V |
| Power Consumption | | - | | 1.5 | W |
| Data Rate | DR | | 10.3 | 11.3 | Gbps |
| Data Speed Tolerance | ∆DR | -100 | | +100 | ppm |
| Link Distance with OM3 fiber | D | 0 | | 300 | m |
Optical Characteristics
All parameters are specified under the recommended operating
conditions with PRBS31 data pattern unless otherwise specified.
| Parameter | Symbol | Min | Typical | Max | Unit | Notes |
| Transmitter |
| Center Wavelength | λC | 840 | 850 | 860 | nm | 1 |
| RMS Spectral Width | λrms | - | | 0.4 | nm | 1 |
| Average Launch Power, each lane | PAVG | -7 | -2.5 | 0 | dBm | |
| Optical Modulation Amplitude (OMA) | POMA | -5 | -2.5 | 0 | dBm | 1 |
| Difference in Launch Power between any two lanes | Ptx,diff | | | 4.0 | dB | |
| Launch Power in OMA minus Transmitter and Dispersion Penalty (TDP),
each Lane | OMA-TDP | | | 3.5 | dB | 1 |
| Rise/Fall Time | Tr/Tf | | | 50 | ps | |
| Extinction Ratio | ER | 3.5 | | | dB | |
| Transmitter Eye Mask Margin | EMM | 10 | | | % | 2 |
| Average Launch Power OFF Transmitter, each Lane | Poff | | | -30 | dBm | |
| Transmitter Eye Mask Definition {X1, X2, X3, Y1, Y2, Y3} | | {0.25, 0.4, 0.45, 0.25, 0.28, 0.4} | | | | |
| Parameter | Symbol | Min | Typical | Max | Unit | Notes |
| Receiver |
| Center Wavelength | λC | 840 | 850 | 860 | nm | |
| Damage Threshold | THd | +3 | | | dBm | |
| Overload, each lane | OVL | +2.4 | | | dBm | |
| Receiver Sensitivity in OMA, each Lane | SEN | | | -9.5 | dBm | |
| Signal Loss Assert Threshold | LOSA | -30 | | | dBm | |
| Signal Loss Deassert Threshold | LOSD | | | -9 | dBm | |
| LOS Hysteresis | LOSH | 0.5 | | 6 | dB | |
| Optical Return Loss | ORL | | | -12 | dBm | |
Notes:
- Transmitter wavelength, RMS spectral width and power need to meet
the OMA minus TDP specs to guarantee link performance.
- The eye diagram is tested with 1000 waveform.
Electrical Specifications
| Parameter | Symbol | Min | Typical | Max | Unit |
| Differential input impedance | Zin | 90 | 100 | 110 | ohm |
| Differential Output impedance | Zout | 90 | 100 | 110 | ohm |
| Differential input voltage amplitude | ΔVin | 300 | | 1100 | mVp-p |
| Differential output voltage amplitude | ΔVout | 500 | | 800 | mVp-p |
| Bit Error Rate | BR | | | E-12 |
| Input Logic Level High | VIH | 2.0 | | VCC | V |
| Input Logic Level Low | VIL | 0 | | 0.8 | V |
| Output Logic Level High | VOH | VCC-0.5 | | VCC | V |
| Output Logic Level Low | VOL | 0 | | 0.4 | V |
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. Module circuit ground is isolated from module chassis ground
within the module. GND is the symbol for signal and supply (power)
common for QSFP modules.
2. The connector pins are each rated for a maximum current of
500mA.
ModSelL Pin
The ModSelL is an input pin. When held low by the host, the module
responds to 2-wire serial communication commands. The ModSelL
allows the use of multiple QSFP modules on a single 2-wire
interface bus. When the ModSelL is “High”, the module will not
respond to any 2-wire interface communication from the host.
ModSelL has an internal pull-up in the module.
ResetL Pin
Reset. LPMode_Reset has an internal pull-up in the module. A low
level on the ResetL pin for longer than the minimum pulse length
(t_Reset_init) initiates a complete module reset, returning all
user module settings to their default state. Module Reset Assert
Time (t_init) starts on the rising edge after the low level on the
ResetL pin is released. During the execution of a reset (t_init)
the host shall disregard all status bits until the module indicates
a completion of the reset interrupt. The module indicates this by
posting an IntL signal with the Data_Not_Ready bit negated. Note
that on power up (including hot insertion) the module will post
this completion of reset interrupt without requiring a reset.
LPMode Pin
E-link QSFP+ eSR4 operate in the low power mode (less than 1.5 W
power consumption) This pin active high will decrease power
consumption to less than 1W.
ModPrsL Pin
ModPrsL is pulled up to Vcc on the host board and grounded in the
module. The ModPrsL is asserted “Low” when the module is inserted
and deasserted “High” when the module is physically absent from the
host connector.
IntL Pin
IntL is an output pin. When “Low”, it indicates a possible module
operational fault or a status critical to the host system. The host
identifies the source of the interrupt by using the 2-wire serial
interface. The IntL pin is an open collector output and must be
pulled up to Vcc on the host board.
