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- 1.25G GBIC Optical Transceiver SPT-G851G-S5
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- Fiber Optic Transceiver Module
- High Speed Cable
- Fiber Optical Cable
- Fiber Optical Patch Cords
- Splitter CWDM DWDM
- PON Solution
- FTTH Box ODF Closure
- PCI-E Network Card
- Network Cables
- Fiber Optical Adapter
- Fiber Optical Attenuator
- Fiber Media Converter
- PDH Multiplexers
- Protocol Converter
- Digital Video Multiplexer
- Fiber Optical Tools
- Compatible
1.25G GBIC Optical Transceiver SPT-G851G-S5
SPT-G851G-S5
1.25Gbps GBIC Optical Transceiver, 550m Reach
Features
Dual data-rate of 1.25Gbps/1.0625Gbps operation
850nm VCSEL laser and PIN photodetector
Duplex SC optical interface
Standard serial ID information compatible with SFF-8053
550m transmission with 50/125 µm MMF
275m transmission with 62.5/125 µm MMF
+3.3V/5V single power supply
RoHS Compliant
Operating case temperature: 0 to +70℃
Applications
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems
Description
The GBIC transceiver is high performance, cost effective module supporting dual data-rate of 1.25Gbps/1.0625Gbps 1.25Gbps/1.0625Gbps and from 500m transmission on 50/125 µm MMF
The transceiver consists of two sections: The transmitter section incorporates a VSCEL laser. And the receiver section consists of a PIN photodiode integrated with a trans-impedance preamplifier (TIA). All modules satisfy class I laser safety requirements.
The optical output can be disabled by a TTL logic high-level input of Tx Disable. Tx Fault is provided to indicate degradation of the laser. Loss of signal (LOS) output is provided to indicate the loss of an input optical signal of receiver.
The standard serial ID information Compatible with GBIC MSA describes the transceiver’s capabilities, standard interfaces, manufacturer and other information. The host equipment can access this information via the two-wire serial CMOS EEPROM protocol. For further information, please refer to SFF-8053
Absolute Maximum Ratings
Stress in excess of the maximum absolute ratings can cause permanent damage to the module.
Table 1 - Absolute Maximum Ratings
Parameter | Symbol | Min | Typical | Max | Unit |
Maximum Supply Voltage | Vcc | 0.5 | - | 4.5 | V |
Storage Temperature | TS | -40 | - | 100 | ℃ |
Relative Humidity | RH | 0 | - | +85 | % |
Recommended Operating Conditions
Table2 - Recommended Operating Conditions
Parameter | Symbol | Min | Typical | Max | Unit | ||
Operating Case Temperature | Standard | TC | 0 | - | +70 | ℃ | |
Power Supply Voltage | VCC | 3.1 |
| 5.5 | V | ||
Power Supply Current | Icc |
|
| 300 | mA | ||
Data Rate | Gigabit Ethernet |
|
| 1.25 |
|
Gbps | |
Fibre Channel |
|
| 1.0625 |
| |||
Optical and Electrical Characteristics
SPT-G851G-S5: (850nm VCSEL and PIN, 500m)
Table3 - Optical and Electrical Characteristics (Operating case temperature TC=25℃, VCC=3.3V)
Parameter | Symbol | Min. | Typical | Max. | Unit | Notes | |
Transmitter | |||||||
Centre Wavelength | λC | 830 | 850 | 860 | nm |
| |
Average Output Power | P0ut | -9 |
| -3 | dBm | 1 | |
Spectral Width (RMS) | σ |
|
| 0.85 | nm |
| |
Extinction Ratio | ER | 9 |
|
| dB |
| |
Output Optical Eye | IEEE 802.3z and ANSI Fibre Channel compatible | 2 | |||||
Data Input Swing Differential | VIN | 300 |
| 1860 | mV | 3 | |
Input Differential Impedance | ZIN | 90 | 100 | 110 | Ω |
| |
TX Disable | Disable |
| 2.0 |
| Vcc | V |
|
Enable |
| 0 |
| 0.8 | V |
| |
TX Fault | Fault |
| 2.0 |
| Vcc+0.3 | V |
|
| Normal |
| 0 |
| 0.8 | V |
|
Receiver | |||||||
Centre Wavelength | λC | 770 |
| 860 | nm |
| |
Receiver Sensitivity |
|
|
| -18 | dBm | 4 | |
Receiver Overload |
| -3 |
|
| dBm | 4 | |
Optical Path Penalty |
|
|
| 1 | dB | 5 | |
LOS De-Assert | LOSD |
|
| -19 | dBm |
| |
LOS Assert | LOSA | -30 |
|
| dBm |
| |
LOS Hysteresis |
| 1 |
| 4 | dB |
| |
Data Output Swing Differential | VOUT | 370 |
| 1800 | mV | 6 | |
Notes:
1.The optical power is launched into SMF.
2.MeasuredwithaPRBS27-1testpattern@1250Mbps.
3.PECLinput,internallyACcoupledandterminated.
4.MeasuredwithaPRBS27-1testpattern@1250Mbps,BER≤1×10-12.
5.MeasuredwithaPRBS27-1testpattern@1250Mbps,over20kmG.652SMF,BER≤1×10-12.
6. Internally AC coupled.
EEPROM Section
The SFF-8053 defines a 256-byte memory map in EEPROM describing the transceiver’s capabilities, standard interfaces, manufacturer, and other information, which is accessible over a 2 wire serial interface at the 8-bit address 1010000X (A0h).
Pin Definitions
Pin Diagram
Pin Descriptions
Pin Name | Pin# | Name/Function | Signal Specification |
Receiver signals | |||
RGND |
2,3,11,14 | Receiver Ground (may be connected sith TGND in GBIC) |
Groud,to GBIC |
VDDR |
15 | Receiver+3.3/5 volt (may be connected with VDDT in GBIC) |
Power,to GBIC |
-RX_DAT | 12 | Receive Data, Differential PECL | High speed serial.from GBIC |
+RX_DAT | 13 | Receive Data, Differential PECL | High speed serial.from GBIC |
RX_LOS |
1 | Receiver Loss of Signal,logic high,open collector compatible,4.7k to 10kΩpull up to VDDT on host |
Low speed, from GBIC |
Transmitter signals | |||
TGND |
8,9,17,20 | Transmitter Groud (may be connected with RGND internally) |
Ground,to GBIC |
VDDT |
16 | Transmitter +3.3/5 volt (may be connected with VDDR in GBIC) |
Power,to GBIC |
-TX_DAT | 18 | Transmit Data,Differential PECL | High speed serial,to GBIC |
+TX_DAT | 19 | Transmit Data,Differential PECL | High speed serial,to GBIC |
TX_DISABLE |
7 | Transmitter Disable,logic high,open collector Compatible,4.7k to 10kΩ pull up to VDDT on GBIC |
Low speed,to GBIC |
TX_FAULT |
10 | Transmitter,Fault,logic high,open collector compatible,4.7k to 10kΩ pull up to VDDT on host |
Low speed,from GBIC |
Control signals | |||
MOD_DEF(0) | 4 | TTL low,output |
Please reference SFF-8053,Annex D; Module definition”4” |
MOD_DEF(1) | 5 | SCL serial clock signal,input | |
MOD_DEF(2) | 6 | SDA serial data signal,input/output | |
Block Diagram of Transceiver
Mechanical Dimensions
Ordering information
Part number | Product Description |
SPT-G851G-S5 | 850nm, 1.25Gbps, 550m, 0°C~+70°C |
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