LMT-GE-MM850
LMT-GE-MM850
1.25Gbps SFP Optical Transceiver, 550m，DDM
- SFP package with LC connector
- 850nm VCSEL Laser and PIN photo detector
- Up to 550m transmission on 50/125 um MMF
- +3.3V single power supply
- LVPECL compatible data input/output interface
- Low EMI and excellent ESD protection
- laser safety standard IEC-60825 compliant
- Compatible with RoHS
- Digital Diagnostic SFF-8472 compliant
Model
LMT-GE-MM850
LMT-MM850
Series
LMT-GE-MM850
LMT-GE-MM850
LMT-GE-MM850
LMT-GE-MM850
Hightlight Features
- SFP package with LC connector
- 850nm VCSEL Laser and PIN photo detector
- Up to 550m transmission on 50/125 um MMF
- +3.3V single power supply
- LVPECL compatible data input/output interface
Low EMI and excellent ESD protection
- laser safety standard IEC-60825 compliant
- Compatible with RoHS
- Digital Diagnostic SFF-8472 compliant
- 1.25 Gb/s 1000Base-SX Ethernet
- Dual Rate 1.063/2.125 Gb/s Fibre Channel
- Wireless – CPRI, OBSAI, LTE
Parameter | Symbol | Minimum | Maximum | Units |
Storage Temperature | Tst | -40 | +85 | °C |
Supply Voltage | Vcc | 0 | +3.6 | V |
Operating Relative Humidity | RH | 5 | 95 | % |
Parameter | Symbol | Min | Typical | Max | Units |
Supply Voltage | Vcc | 3.15 | 3.45 | V | |
Operating Case Temperature | Tc | -40 | +85 | °C | |
Power Dissipation | 1 | W |
Application
- 1.25 Gb/s 1000Base-SX Ethernet
- Dual Rate 1.063/2.125 Gb/s Fibre Channel
- Wireless – CPRI, OBSAI, LTE
Absolute Maximum Ratings
Parameter | Symbol | Minimum | Maximum | Units |
Storage Temperature | Tst | -40 | +85 | °C |
Supply Voltage | Vcc | 0 | +3.6 | V |
Operating Relative Humidity | RH | 5 | 95 | % |
Operation Environment
Parameter | Symbol | Min | Typical | Max | Units |
Supply Voltage | Vcc | 3.15 |
| 3.45 | V |
Operating Case Temperature | Tc | -40 |
| +85 | °C |
Power Dissipation |
|
|
| 1 | W |
Data Rate |
|
| 1250 |
| Mbps |
Optical Characteristics：
(Ambient Operating Temperature -40°C to +85°C, Vcc =3.3 V)
Parameter | Symbol | Min. | Typ. | Max. | Units |
Transmitter Section | |||||
Center Wavelength | lo | 830 | 850 | 860 | nm |
Average Output Power | Po | -9 | – | -3 | dBm |
Extinction Ratio | Er | 8 | – | dB | |
Rise/Fall Time(20%~80%) | Tr/Tf | 300 | ps | ||
Total jitter | Tj | 0.43 | UI | ||
Optical Eye Diagram | IEEE 802.3z and ANSI Fibre Channel Compatible | ||||
Receiver Section | |||||
Center Wavelength | lo | 830 | 860 | nm | |
Receiver Sensitivity | Rsen | -19 | dBm | ||
Receiver Overload | Rov | -3 | dBm | ||
Return Loss | 12 | dB | |||
LOS Assert | LOSA | -36 | dBm | ||
LOS Dessert | LOSD | -20 | dBm | ||
LOS Hysteresis | 0.5 | 5 | |||
Electrical Characteristics：
(Ambient Operating Temperature-4 0°C to +85°C, Vcc =3.3 V)
Parameter | Symbol | Min. | Typ. | Max. | unit | |
Transmitter Section | ||||||
Input Differential Impendence | Zin | 90 | 100 | 110 | Ohm | |
Data Input Swing Differential | Vin | 500 |
| 2400 | mV | |
|
|
|
|
|
|
|
TX Disable | Disable |
| 2.0 |
| Vcc | V |
Enable |
| 0 |
| 0.8 | V | |
TX Fault | Assert |
| 2.0 |
| Vcc | V |
Deassert |
| 0 |
| 0.8 | V | |
Receiver Section | ||||||
Output differential impendence | Zout |
| 100 |
| Ohm | |
Data Input Swing Differential | Vout | 370 |
| 2000 | mV | |
Rx_LOS | Assert |
| 2.0 |
| Vcc | V |
Deassert |
| 0 |
| 0.8 | V | |
EEPROM INFORMATION（A0）:
Addr | Field Size (Bytes) | Name of Field | HEX | Description |
0 | 1 | Identifier | 03 | SFP |
1 | 1 | Ext. Identifier | 04 | MOD4 |
2 | 1 | Connector | 07 | LC |
3-10 | 8 | Transceiver | 00 00 00 02 12 00 0D 01 | Transmitter Code |
11 | 1 | Encoding | 01 | 8B10B |
12 | 1 | BR, nominal | 0D | 1250M bps |
13 | 1 | Reserved | 00 |
|
14 | 1 | Length (9um)-km | 00 |
|
15 | 1 | Length (9um) | 00 |
|
16 | 1 | Length (50um) | 37 | 550m |
17 | 1 | Length (62.5um) | 1B | 270m |
18 | 1 | Length (copper) | 00 |
|
19 | 1 | Reserved | 00 |
|
20-35 | 16 | Vendor name | 57 49 4E 54 4F 50 20 20 20 20 20 20 20 20 20 20 | WINTOP |
36 | 1 | Reserved | 00 |
|
37-39 | 3 | Vendor OUI | 00 00 00 |
|
40-55 | 16 | Vendor PN | xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx | ASC II |
56-59 | 4 | Vendor rev | 31 2E 30 20 | V1.0 |
60-61 | 2 | Wavelength | 03 52 | 850nm |
62 | 1 | Reserved | 00 |
|
63 | 1 | CC BASE | XX | Check sum of byte 0~62 |
64-65 | 2 | Options | 00 1A | LOS, TX_DISABLE, TX_FAULT |
66 | 1 | BR, max | 32 | 50% |
67 | 1 | BR, min | 32 | 50% |
68-83 | 16 | Vendor SN | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | Unspecified |
84-91 | 8 | Vendor date code | XX XX XX 20 | Year, Month, Day |
92-94 | 3 | Reserved | 00 |
|
95 | 1 | CC_EXT | XX | Check sum of byte 64~94 |
96-255 | 160 | Vendor specific |
|
|
Diagnostics:
Parameter | Range | Accuracy | Unit | Calibration |
Temperature | -40 ~ 85 | ±5 | ºC | Internal |
Voltage | 3.15 ~ 3.45 | ±0.1 | V | Internal |
Bias Current | 2~ 15 | ±10% | mA | Internal |
Tx Power | -9~ -2 | ±3 | dBm | Internal |
Rx Power | -3~-26 | ±3 | dBm | Internal |
Pin Description:
Pins | Name | Discription | NOTE |
1 | VeeT | Transmitter Ground |
|
2 | Tx Fault | Transmitter Fault Indication | 1 |
3 | Tx Disable | Transmitter Disable | 2 |
4 | MOD DEF2 | Module Definition 2 | 3 |
5 | MOD DEF1 | Module Definition 1 | 3 |
6 | MOD DEF0 | Module Definition 0 | 3 |
7 | Rate Select | Not Connected |
|
8 | LOS | Loss of Signal | 4 |
9 | VeeR | Receiver Ground |
|
10 | VeeR | Receiver Ground |
|
11 | VeeR | Receiver Ground |
|
12 | RD- | Inv. Received Data Output | 5 |
13 | RD+ | IReceived Data Output | 5 |
14 | VeeR | Receiver Ground |
|
15 | VccR | Receiver Power |
|
16 | VccT | Transmitter Power |
|
17 | VeeT | Transmitter Ground |
|
18 | TD+ | Transmit Data Input | 6 |
19 | TD- | Inv. Transmit Data Input | 6 |
20 | VeeT | Transmitter Ground |
|
Notes:
- TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 0.8V.
- TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7k~10kΩ resistor. Its states are: Low (0~0.8V): Transmitter on (>0.8V, <2.0V): Undefined High (2.0~3.465V): Transmitter Disabled Open: Transmitter Disabled
- MOD-DEF 0,1,2 are the module definition pins. They should be pulled up with a 4.7k~10kΩ resistor on the host board. The pull-up voltage shall be VccT or VccR. MOD-DEF 0 is grounded by the module to indicate that the module is present MOD-DEF 1 is the clock line of two wire serial interface for serial ID MOD-DEF 2 is the data line of two wire serial interface for serial ID
- LOS is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates loss of signal. In the low state, the output will be pulled to less than 0.8V.
- These are the differential receiver output. They are internally AC-coupled 100Ω differential lines which should be terminated with 100Ω (differential) at the user SERDES.
- These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential termination inside the module.
Recommended Application Circuit
Outline Dimensions (mm)
