COME-SFP-GE-LX-B20 1.25GB/S SM 20KM SFP TRANSCEIVER
COME-SFP-GE-LX-B20
- Detail
COME-SFP-GE-LX-B20 high performance, cost-effective 1.25G BiDi SFP transceiver complies with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). It provides Digital diagnostics functions via a 2-wire serial interface as specified in SFF-8472. It adopts high-performance FP/DFB transmitter and high-sensitivity PIN receiver, provides up to 14dB link budge for Gigabit Ethernet applications up to 20km on a single core single mode fiber.
Features：
- Up to 1.25Gb/s Data Links
2. Hot-Pluggable
3. Simplex LC connector; SC optional
4. 1310nm FP or 1490/1550nm DFB transmitter, PIN photo-detector
5. 20km on a single core SMF
6. 2-wire interface for management specifications compliant with SFF 8472 digital diagnostic monitoring interface
7. Power Supply :+3.3V
8. Power consumption<1W
9. Temperature Range: 0~ 70°C, -40°C to 85°C/-5°C to 85°C available - 10. RoHS compliant
Applications:
1. 1000Base-LX Ethernet
2. Metro/Access Networks
3. 1G Fibre Channel
4. Other Optical Links
Ordering Information:
|
Part Number |
Data Rate |
Distance |
Wavelength |
Laser |
Fiber |
DDM |
Connector |
|
COME-SFP-GE-B20-35 |
1.25Gb/s |
20km |
TX1310nm/RX1550nm |
FP/PIN |
SM |
Yes |
Simplex LC |
|
COME-SFP-GE-B20-53 |
1.25Gb/s |
20km |
TX1550nm/RX1310nm |
DFB/PIN |
SM |
Yes |
Simplex LC |
|
COME-SFP-GE-B20-35-SC |
1.25Gb/s |
20km |
TX1310nm/RX1550nm |
FP/PIN |
SM |
Yes |
Simplex SC |
|
COME-SFP-GE-B20-53-SC |
1.25Gb/s |
20km |
TX1550nm/RX1310nm |
DFB/PIN |
SM |
Yes |
Simplex SC |
|
COME-SFP-GE-B20-34 |
1.25Gb/s |
20km |
TX1310nm/RX1490nm |
FP/PIN |
SM |
Yes |
Simplex LC |
|
COME-SFP-GE-B20-43 |
1.25Gb/s |
20km |
TX1490nm/RX1310nm |
DFB/PIN |
SM |
Yes |
Simplex LC |
|
COME-SFP-GE-B20-34-SC |
1.25Gb/s |
20km |
TX1310nm/RX1490nm |
FP/PIN |
SM |
Yes |
Simplex SC |
|
COME-SFP-GE-B20-43-SC |
1.25Gb/s |
20km |
TX1490nm/RX1310nm |
DFB/PIN |
SM |
Yes |
Simplex SC |
“-E” for extended temperature-5°Cto 85°C;
“-I” for extended temperature -40°C to 85°C.
Absolute Maximum Ratings
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
|
StorageTemperature |
TS |
-40 |
|
+85 |
°C |
|
SupplyVoltage |
VCCT, R |
-0.5 |
|
4 |
V |
|
RelativeHumidity |
RH |
0 |
|
85 |
% |
Recommended Operating Environment:
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
|
|
CaseoperatingTemperature |
Industrial |
TC |
-40 |
|
85 |
°C |
|
Extended |
-5 |
|
85 |
°C |
||
|
Commercial |
0 |
|
+70 |
°C |
||
|
SupplyVoltage |
VCC |
3.135 |
|
3.465 |
V |
|
|
Supply Current |
Icc |
|
|
300 |
mA |
|
|
Inrush Current |
Isurge |
|
|
Icc+30 |
mA |
|
|
Maximum Power |
Pmax |
|
|
1 |
W |
|
Electrical Characteristics (TOP = 0 to70 °C, VCC = 3.135 to 3.465 Volts)
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
Note |
|
Transmitter Section: |
|
|||||
|
Input differential impedance |
Rin |
90 |
100 |
110 |
|
|
|
Single ended data input swing |
Vin PP |
250 |
|
1200 |
mVp-p |
|
|
Transmit Disable Voltage |
VD |
Vcc – 1.3 |
|
Vcc |
V |
2 |
|
Transmit Enable Voltage |
VEN |
Vee |
|
Vee+ 0.8 |
V |
|
|
Transmit Disable Assert Time |
Tdessert |
|
|
10 |
us |
|
|
Receiver Section: |
|
|||||
|
Single ended data output swing |
Vout,pp |
300 |
|
800 |
mv |
3 |
|
LOS Fault |
Vlosfault |
Vcc – 0.5 |
|
VCC_host |
V |
5 |
|
LOS Normal |
Vlos norm |
Vee |
|
Vee+0.5 |
V |
5 |
|
Power Supply Rejection |
PSR |
100 |
|
|
mVpp |
6 |
Notes: 1. AC coupled. 2. Or open circuit. 3. Into 100 ohm differential termination. 4. 20 – 80 %
- LOS is LVTTL. Logic 0 indicates normal operation; logic 1 indicates no signal detected.
- All transceiver specifications are compliant with a power supply sinusoidal modulation of 20 Hz to 1.5MHz up to specified value applied through the power supply filtering network shown on page 23 of the Small Form-factor Pluggable (SFP) Transceiver Multi-Source Agreement (MSA), September 14, 2000.
Optical Parameters (TOP = 0 to70°C, VCC = 3.135 to 3.465 Volts)
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
Note |
|
|
Transmitter Section: |
|||||||
|
Center Wavelength |
COME-SFP-GE-B20-35 |
λc |
1290 |
1310 |
1330 |
nm |
|
|
COME-SFP-GE-B20-34 |
1290 |
1310 |
1330 |
|
|||
|
COME-SFP-GE-B20-53 |
1530 |
1550 |
1570 |
|
|||
|
COME-GE-B20-43 |
1470 |
1490 |
1510 |
|
|||
|
Spectral Width(RMS) |
σRMS |
|
|
4 |
nm |
|
|
|
Optical Output Power |
Pout |
-9 |
|
-3 |
dBm |
1 |
|
|
Extinction Ratio |
ER |
9 |
|
|
dB |
|
|
|
Optical Rise/Fall Time |
tr / tf |
|
|
260 |
ps |
2 |
|
|
Relative Intensity Noise |
RIN |
|
|
-120 |
dB/Hz |
|
|
|
Total Jitter Contribution |
TXΔ TJ |
|
|
0.284 |
UI |
3 |
|
|
Eye Mask for Optical Output |
Compliant with IEEE802.3 z (class 1 laser safety) |
|
|||||
|
Receiver Section: |
|
||||||
|
Optical Input Wavelength |
COME-SFP-GE-B20-35 |
λc |
1530 |
1550 |
1570 |
nm |
|
|
COME-SFP-GE-B20-34 |
1470 |
1490 |
1510 |
|
|||
|
COME-SFP-GE-B20-53 |
1290 |
1310 |
1330 |
|
|||
|
COME-SFP-GE-B20-43 |
1290 |
1310 |
1330 |
|
|||
|
ReceiverOverload |
Pol |
-3 |
|
|
dBm |
4 |
|
|
RXSensitivity |
Sen |
|
|
-23 |
dBm |
4 |
|
|
RX_LOS Assert |
LOS A |
-35 |
|
|
dBm |
|
|
|
RX_LOS De-assert |
LOS D |
|
|
-25 |
dBm |
|
|
|
RX_LOS Hysteresis |
LOS H |
0.5 |
|
|
dB |
|
|
|
General Specifications: |
|||||||
|
Data Rate |
BR |
|
1.25 |
|
Gb/s |
|
|
|
Bit Error Rate |
BER |
|
|
10-12 |
|
|
|
|
Max. Supported Link Length on 9/125μm SMF@1.25Gb/s |
LMAX |
|
20 |
|
km |
|
|
|
Total System Budget |
LB |
14 |
|
|
dB |
|
|
Notes: 1. The optical power is launched into SMF.
- 20-80%.
- Contributed total jitter is calculated from DJ and RJ measurements using TJ = RJ + DJ. Contributed RJ is calculated for 1x10-12 BER bymultiplying the RMS jitter (measured on a single rise or fall edge) from the oscilloscope by 14. Per FC-PI (Table 9 - SM jitter output, note 1), the actual contributed RJ is allowed to increase above its limit if the actual contributed DJ decreases below its limits, as long as the component output DJ and TJ remain within their specifi ed FC-PI maximum limits with the worst case specified component jitter input.
- Measured with PRBS 27-1at 10-12BER
Pin Assignment
Diagram of Host Board Connector Block Pin Numbers and Name
Pin Function Definitions
|
Pin No |
Name |
Function |
Plug Seq |
Notes |
|
1 |
VeeT |
Transmitter Ground |
1 |
1 |
|
2 |
TX Fault |
Transmitter Fault Indication |
3 |
|
|
3 |
TX Disable |
Transmitter Disable |
3 |
2 |
|
4 |
MOD-DEF2 |
Module Definition |
2 |
3 |
|
5 |
MOD-DEF1 |
Module Definition 1 |
3 |
3 |
|
6 |
MOD-DEF0 |
Module Definition 0 |
3 |
3 |
|
7 |
Rate Select |
Not Connected |
3 |
4 |
|
8 |
LOS |
Loss of Signal |
3 |
5 |
|
9 |
VeeR |
Receiver Ground |
1 |
1 |
|
10 |
VeeR |
Receiver Ground |
1 |
1 |
|
11 |
VeeR |
Receiver Ground |
|
1 |
|
12 |
RD- |
Inv. Received Data Out |
3 |
6 |
|
13 |
RD+ |
Received Data Out |
3 |
6 |
|
14 |
VeeR |
Receiver Ground |
3 |
1 |
|
15 |
VccR |
Receiver Power |
2 |
1 |
|
16 |
VccT |
Transmitter Power |
2 |
|
|
17 |
VeeT |
Transmitter Ground |
1 |
|
|
18 |
TD+ |
Transmit Data In |
3 |
6 |
|
19 |
TD- |
Inv. Transmit In |
3 |
6 |
|
20 |
VeeT |
Transmitter Ground |
1 |
|
Notes: 1. Circuit ground is internally isolated from chassis ground.
- Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
- Should be pulled up with 4.7k - 10 kohms on host board to a voltage between 2.0V and 3.6V. MOD_DEF(0) pulls line low to indicate module is plugged in.
- Rate select is not used
- LOS is open collector output. Should be pulled up with 4.7k – 10 kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
- AC Coupled
SFP Module EEPROM Information and Management
The SFP modules implement the 2-wire serial communication protocol as defined in the SFP -8472. The serial ID information of the SFP modules and Digital Diagnostic Monitor parameters can be accessed through the I2Cinterface at address A0h and A2h. The memory is mapped in Table 1. Detailed ID information (A0h) is listed in Table 2. And the DDM specification at address A2h. For more details of the memory map and byte definitions, please refer to the SFF-8472, “Digital Diagnostic Monitoring Interface for Optical Transceivers”. The DDM parameters have been internally calibrated.
Table 1.Digital Diagnostic Memory Map (Specific Data Field Descriptions)
Table 2- EEPROM Serial ID Memory Contents (A0h)
|
Data Address |
Length (Byte) |
Name of Length |
Description and Contents |
|
Base ID Fields |
|||
|
0 |
1 |
Identifier |
Type of Serial transceiver (03h=SFP) |
|
1 |
1 |
Reserved |
Extended identifier of type serial transceiver (04h) |
|
2 |
1 |
Connector |
Code of optical connector type (07=LC) |
|
3-10 |
8 |
Transceiver |
|
|
11 |
1 |
Encoding |
NRZ(03h) |
|
12 |
1 |
BR, Nominal |
Nominal baud rate, unit of 100Mbps |
|
13-14 |
2 |
Reserved |
(0000h) |
|
15 |
1 |
Length(9um) |
Link length supported for 9/125um fiber, units of100m |
|
16 |
1 |
Length(50um) |
Link length supported for 50/125um fiber, units of10m |
|
17 |
1 |
Length(62.5um) |
Link length supported for 62.5/125um fiber, units of10m |
|
18 |
1 |
Length(Copper) |
Link length supported for copper, units of meters |
|
19 |
1 |
Reserved |
|
|
20-35 |
16 |
Vendor Name |
SFP vendor name: COMELINK |
|
36 |
1 |
Reserved |
|
|
37-39 |
3 |
Vendor OUI |
SFP transceiver vendor OUI ID |
|
40-55 |
16 |
Vendor PN |
Part Number: “COME-SFP-GE-B20-xx” (ASCII) |
|
56-59 |
4 |
Vendor rev |
Revision level for part number |
|
60-62 |
3 |
Reserved |
|
|
63 |
1 |
CCID |
Least significant byte of sum of data in address 0-62 |
|
Extended ID Fields |
|||
|
64-65 |
2 |
Option |
Indicates which optical SFP signals are implemented (001Ah = LOS, TX_FAULT, TX_DISABLE all supported) |
|
66 |
1 |
BR, max |
Upper bit rate margin, units of % |
|
67 |
1 |
BR, min |
Lower bit rate margin, units of % |
|
68-83 |
16 |
Vendor SN |
Serial number (ASCII) |
|
84-91 |
8 |
Date code |
COMELINK’s Manufacturing date code |
|
92-94 |
3 |
Reserved |
|
|
95 |
1 |
CCEX |
Check code for the extended ID Fields (addresses 64 to 94) |
|
Vendor Specific ID Fields |
|||
|
96-127 |
32 |
Readable |
COMELINK specific date, read only |
|
128-255 |
128 |
Reserved |
Reserved for SFF-8079 |
Digital Diagnostic Monitor Characteristics
|
Data Address |
Parameter |
Accuracy |
Unit |
|
96-97 |
Transceiver Internal Temperature |
±3.0 |
°C |
|
100-101 |
Laser Bias Current |
±10 |
% |
|
100-101 |
Tx Output Power |
±3.0 |
dBm |
|
100-101 |
Rx Input Power |
±3.0 |
dBm |
|
100-101 |
VCC3 Internal Supply Voltage |
±3.0 |
% |
Regulatory Compliance
|
Electrostatic Discharge (ESD) to the Electrical Pins |
MIL-STD-883E Method 3015.7 |
Class 1(>1000 V) |
|
Electrostatic Discharge (ESD) to the Single LC Receptacle |
IEC 61000-4-2 GR-1089-CORE |
Compatible with standards |
|
Electromagnetic Interference (EMI) |
FCC Part 15 Class B EN55022 Class B (CISPR 22B) VCCI Class B |
Compatible with standards |
|
Laser Eye Safety |
FDA 21CFR 1040.10 and 1040.11 EN60950, EN (IEC) 60825-1,2 |
Compatible with Class 1 laser product. |
Recommended Circuit
Mechanical Dimensions
Mechanical Drawing with LC Connector
Mechanical Drawing with SC Connector