Features
· 10Gb/s serial optical interface compliant to
802.3ae 10GBASE-ER/EW
·
Electrical interface compliant to SFF-8431 specifications
·
1550nm cooled EML transmitter with TEC, PIN photo-detector
· 2-wire interface for management specifications
compliant with SFF 8472 Standard
· Operating case temperature: 0 to 70 °C
· All-metal housing for superior
EMI performance
· Low power consumption, less than
1.5w
· Advanced firmware allow customer
system encryption information to be stored in transceiver
· Cost effective SFP+ solution,
enables higher port densities and greater bandwidth
· RoHS compliant
Applications
·
10GBASE-ER/EW
·
10GBASE-ER/EW + FEC
· 10G Storage system

Figure1: Application in
System
1. GENERAL DESCRIPTION
This 1550nm
cooled EML laser based
10Gigabit
SFP+ transceiver is designed to transmit and receive optical data over single
mode optical fiber for link length up to
40km.
The SFP+ ER module electrical interface is compliant to SFI electrical
specifications. The transmitter input
and receiver output impedance is 100 Ohms differential. Data lines are internally AC coupled. The module provides differential termination
and reduce differential to common mode conversion for quality signal
termination and low EMI. SFI typically
operates over 200 mm of improved FR4 material or up to about 150mm of standard
FR4 with one connector.
The transmitter converts 10Gbit/s serial
PECL or CML electrical data into serial optical data compliant with the
10GBASE-LR standard.
An open collector compatible Transmit Disable (Tx_Dis) is provided. Logic
“1” or no connection on this pin will disable the laser from transmitting. Logic
“0” on this pin provides normal operation.
The transmitter has an internal automatic power control loop (APC) to
ensure constant optical power output across supply voltage and temperature
variations. An open collector compatible
Transmit Fault (Tx_Fault) is provided. TX_Fault is module output contact that when
high, indicates that the module transmitter has detected a fault condition
related to laser operation or safety.
The TX_Fault output contact is an open drain/collector and shall be
pulled up to the Vcc_Host in the host with a resistor in the range 4.7-10
kΩ. TX_Disable is a module input
contact. When TX_Disable is asserted high or left open, the SFP+ module
transmitter output shall be turned off. This contact shall be pulled up to VccT
with a 4.7 kΩ to 10 kΩ resistor
The
receiver converts 10Gbit/s serial optical data into serial PECL/CML electrical
data. An open collector compatible Loss
of Signal is provided. Rx_LOS when high indicates an optical signal level below
that specified in the relevant standard.
The Rx_LOS contact is an open drain/collector output and shall be pulled
up to Vcc_Host in the host with a resistor in the range 4.7-10 kΩ, or with an
active termination. Power supply filtering is
recommended for both the transmitter and receiver.
The
Rx_LOS signal is intended as a preliminary indication to the system in which
the SFP+ is installed that the received signal strength is below the specified
range. Such an indication typically points to non-installed cables, broken
cables, or a disabled, failing or a powered off transmitter at the far end of
the cable.
2. PROPOSED APPLICATION SCHEMATICS

3. PIN DEFINITION
The SFP+ modules are
hot-pluggable. Hot pluggable refers to plugging in or unplugging a
module while the host board is powered. The
SFP+ host connector is a 0.8 mm pitch 20 position right angle improved
connector specified by SFF-8083, or stacked connector with equivalent with
equivalent electrical performance. Host PCB
contact assignment is shown in Figure 3 and
contact definitions are given in the PIN description table.SFP+
module contacts mates with the host in the order of ground, power, followed by
signal as illustrated by Figure 4 and the contact sequence order listed in the PIN description
table.
 Figure 3: Module
Interface to Host

Figure 4: Module
Contact Assignment
|
PIN description
PIN | Logic | Symbol | Name / Description | Note |
1 | | VeeT | Module Transmitter Ground | 1 |
2 | LVTTL-O | TX_Fault | Module Transmitter Fault | 3 |
3 | LVTTL-I | TX_Dis | Transmitter Disable; Turns off transmitter laser output | 4 |
4 | LVTTL-I/O | SDA | 2-Wire Serial Interface Data Line | 2 |
5 | LVTTL-I | SCL | 2-Wire Serial Interface Clock | 2 |
6 | | MOD_ABS | Module Absent, Grounded in the module | |
7 | LVTTL-I | RS0 | Receiver Rate Select-Not used | |
8 | LVTTL-O | RX_LOS | Receiver Loss of Signal Indication Active LOW | 3 |
9 | LVTTL-I | RS1 | Transmitter Rate Select-Not used | |
10 | | VeeR | Module Receiver Ground | 1 |
11 | | VeeR | Module Receiver Ground | 1 |
12 | CML-O | RD- | Receiver Inverted Data Output | |
13 | CML-O | RD+ | Receiver Data Output | |
14 | | VeeR | Module Receiver Ground | 1 |
15 | | VccR | Module Receiver 3.3 V Supply | |
16 | | VccT | Module Receiver 3.3 V Supply | |
17 | | VeeT | Module Transmitter Ground | 1 |
18 | CML-I | TD+ | Transmitter Non-Inverted Data Input | |
19 | CML-I | TD- | Transmitter Inverted Data Input | |
20 | | VeeT | Module Transmitter Ground | 1 |
Note:
1. Module ground pins GND are isolated from the module case.
2. Shall be pulled up with 4.7K-10 kΩ to a voltage between 3.15V and 3.45V on the host board.
3. This contact is an open collector/drain output contact and shall be pulled up on the host board.
4. Tx_Disable is an input contact with a 4.7 kΩ to 10 kΩ pull up to VccT inside the module.
4. TRANSCEIVER BLOCK DIAGRAM

5. ABSOLUTE MAXIMUM RATING
These values represent the damage threshold of the module. Stress in excess of any of the individual Absolute Maximum Ratings can cause immediate catastrophic damage to the module even if all other parameters are within Recommended Operating Conditions.
Parameters | Symbol | Min. | Max. | Unit |
Power Supply Voltage | VCC | 0 | 3.6 | V |
Storage Temperature | Tc | -40 | 85 | °C |
Operating Case Temperature | Tc | 0 | 70 | °C |
Relative Humidity | RH | 5 | 95 | % |
RX Input Average Power | Pmax | - | 0 | dBm |
6. RECOMMENDED OPERATING ENVIRONMENT
Recommended Operating Environment specifies parameters for which the electrical and optical characteristics hold unless otherwise noted.
Parameters | Symbol | Min. | Typical | Max | Unit |
Power Supply Voltage | VCC | 3.135 | 3.3 | 3.465 | V |
Power Supply Current | Icc | - | 350 | 450 | mA |
Operating Case Temperature | TC | 0 | 25 | 70 | °C |
7. OPTICAL CHARACTERISTICS
The following optical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
Parameter | Symbol | Min. | Typical | Max | Unit | Note |
Operating Reach | | | | 40 | km | |
Transmitter |
Center wavelength | λ | 1530 | | 1565 | nm | |
Side Mode Suppression Ratio | SMSR | 30 | | | dB | |
Optical spectrum width(-20dB) | | | | 1 | nm | |
Launched power | Po | -3 | | 3 | dBm | |
Launched power in OMA | | -2.1 | | | dBm | |
Transmitter and dispersion penalty | DP | | | 2 | dB | 4 |
Average launch power of OFF transmitter | Poff | | | -30 | dBm | |
Extinction ratio | ER | 6 | | | dB | |
RIN | RIN | | | -128 | dB/Hz | |
Optical Return Loss Tolerance | RL | 21 | | | dB | |
Receiver |
Center wavelength | λ | 1250 | - | 1600 | nm | |
Receiver Overload | | -1 | | | dBm | |
Receiver Sensitivity | RSEN | | | -15.8 | dBm | 1 |
Receiver sensitivity in OMA | | | | -14.1 | dBm | 2 |
Receiver Reflectance | Rf | | | -26 | dB | |
Stressed receiver sensitivity in OMA | | | | -11.3 | dBm | |
Vertical eye closure penalty | | | | 2.7 | dB | 3 |
LOS Assert | LOSA | -30 | | | dBm | |
LOS De-assert | LOSD | | | -16 | dBm | |
LOS Hysteresis | | 0.5 | | | dB | |
Stressed eye jitter | | 0.3 | | | UI | 2 |
Receive electrical 3dB upper cutoff frequency | | | | 12.3 | GHz | |
Receiver power (damage) | | | | 5 | dBm | |
| | | | | | | | | |
Notes:
1. Average optical power shall be measured using the methods specified in TIA/EIA-455-95.
2. Receiver sensitivity is informative. Stressed receiver sensitivity shall be measured with conformance test signal for BER =1x 10-12.
3. Vertical eye closure penalty and stressed eye jitter are the test conditions for measuring stressed receiver sensitivity. They are not the required characteristic of the receiver.
4. Path penalty is intended as the power penalty of the interface between back-to-back and the maximum applied dispersion.
8. ELECTRICAL CHARACTERISTICS
The following electrical characteristics are defined over the Recommended Operating Environment unless otherwise specified.
Parameter | Symbol | Min. | Typical | Max | Unit | Notes |
Data Rate | | - | 10.3125 | 11.3 | Gbps | NRZ |
Power Consumption | | - | 1200 | 1500 | mW | |
Transmitter |
Single Ended Output Voltage Tolerance | | -0.3 | - | 4 | V | |
C common mode voltage tolerance | | 15 | - | - | mV | |
Tx Input Diff Voltage | VI | 180 | | 700 | mV | |
Tx Fault | VoL | -0.3 | | 0.4 | V | |
Voh | 2.0 | | Vcc+0.3 | V | |
Tx Disable | VoL | Vee | | Vee+0.8 | V | |
Voh | 2 | | Vcc | V | |
Data Dependent Input Jitter | DDJ | | | 0.1 | UI | |
Data Input Total Jitter | TJ | | | 0.28 | UI | |
Receiver |
Single Ended Output Voltage Tolerance | | -0.3 | - | 4 | V | |
Rx Output Diff Voltage | Vo | 300 | | 850 | mV | |
Rx Output Rise and Fall Time | Tr/Tf | 30 | | | ps | 20% to 80% |
Total Jitter | TJ | | | 0.7 | UI | |
Deterministic Jitter | DJ | | | 0.42 | UI | |
9. DITITAL DIAGNOSTIC FUNCTIONS
The following digital diagnostic characteristics are defined over the Recommended Operating Environment unless otherwise specified. It is compliant to SFF8472 Rev10.2 with internal calibration mode. For external calibration mode please contact our sales staff.
Parameter | Symbol | Min. | Max | Unit | Notes |
Temperature monitor absolute error | DMI_Temp | -3 | 3 | degC | Over operating temp |
Laser power monitor absolute error | DMI_TX | -3 | 3 | dB | |
RX power monitor absolute error | DMI_RX | -3 | 3 | dB | -1dBm to -15dBm range |
Supply voltage monitor absolute error | DMI_VCC | -0.1 | 0.1 | V | Full operating range |
Bias current monitor | DMI_Ibias | -10% | 10% | mA | |
10. CONTROL AND STATUS I/O TIMING CHARACTERISTICS
Timing characteristics of control and status I/O are included in Table 8, which is also defined in SFF-8431.
Parameter | Symbol | Min | Max | Unit | Condition |
TX_Disable assert time | t_off | | 10 | Us | Timing from rising edge of TX_Disable to when the optical output falls below 10% of nominal |
TX_Disable negate time | t_on | | 1 | ms | Timing from falling edge of TX_Disable to when the modulated optical output rises above 90% of nominal |
Time to initialize Including reset of TX_Fault | t_init | | 300 | ms | From power on or negation of TX Fault using TX Disable |
TX_fault assert time | TX_fault | | 100 | us | From occurrence of fault to assertion of TX_fault |
TX Disable to reset | t_reset | 10 | | us | Time TX_Disable must be held high to reset TX_fault |
Los assert time | t_loss_on | | 100 | us | Time from LOS state to Rx_Los assert |
Los Deassert Time | t_loss_off | | 100 | us | Time from non_ LOS state to Rx_Los deassert |
Rate-Select Change Time | t_ratesel | | 10 | us | Time from rising or falling edge of Rate Select input until receiver bandwidth is in conformance with appropriate specification |
Serial ID Clock Rate | f_serial_clock | | 100 | kHz | |
11. MECHANICAL
Comply with SFF-8432 rev. 5.0, the improved Pluggable form factor specification.
12. ESD
This transceiver is specified as ESD threshold 1kV for SFI pins and 2kv for all others electrical input pins tested per MIL-STD-883, Method 3015.4 /JESD22-A114-A (HBM). However, normal ESD precautions are still required during the handling of this module. This transceiver is shipped in ESD protective packaging. It should be removed from the packaging and handled only in an ESD protected environment.
13. LASER SAFTY
This is a Class 1 Laser Product according to IEC 60825-1:2007. This product complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated (June 24, 2007)