The PDT-SFP-02-1G-1310D-2000 is a low-cost, high-performance Small Form Pluggable (SFP) transceiver which is specifically designed for fiber communications with up to 1.25Gbps data rate, using SMF, over a distance of up to 20km.
This device is compatible with most vendors including Cisco, Parallax Digital Technologies, Meraki, D-Link, Ubiquiti, Supermicro, Netgear, Broadcom, Mikrotik & Robustel.
The transceiver consists of an FP transmitter, a PIN photodiode, integrated with a trans-impedance pre-amplifier, and an MCU control unit.
The device transmits at 1550nm wavelength and receives at 1310nm wavelength.
Access to internal Digital Diagnostic Memory Maps is possible using a 2-wire serial interface at addresses A0h and A2h.
This is the commercial variant of this product and a wider temperature range variant is also available as part of the Industrial SFP Product Line.
Features:
Up to 1.25Gbps Bi-Directional Data Link
1550nm FP laser and 1310nm PIN Photodetector
Supports Links up to 20km over SMF
Compatible with CONET OC-24-LR-1
Compliant with SFP MSA and SFF-8472 with duplex LC Connector
Digital Diagnostics Monitoring for Internal or External Calibration
Access to Physical Layer via 2-Wire Serial Data Bus
Notes:
Plug Seq.: Pin engagement sequence during hot plugging.
1) TX Fault is not supported and is always connected to ground.
2) TX Disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7 ¨C 10 K resistor. Its states are:
– Low (0 to 0.8V): Transmitter on
– (>0.8, < 2.0V): Undefined
– High (2.0 to 3.465V): Transmitter Disabled Open: Transmitter Disabled
3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K to 10K 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
4) LOS is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor. Pull up voltage between 2.0V and Vcc+0.3V. Logic 1 indicates loss of signal; Logic 0 indicates normal operation. In the low state, the output will be pulled to less than 0.8V.
5) RD-/+: These are the differential receiver outputs. They are AC-coupled, differential lines with 100 differential termination inside the module.
6) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100 differential termination inside the module.
Interface:
Optical & Electrical Characteristics:
Parameter
Symbol
Min
Typical
Max
Unit
Notes
Transmitter
Centre Wavelength
λc
1530
1550
1570
nm
Spectral Width (-20dB)
∆λ
1
nm
Side Mode Suppression Ratio
SMSR
30
dB
Average Output Power
Pout
-9
-3
dBm
1
Extinction Ratio
ER
9
dB
Optical Rise/Fall Time (20%~80%)
tr/tf
0.26
ns
Data Input Swing Differential
VIN
400
1800
mV
2
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
V
Normal
0
0.8
V
Receiver
Centre Wavelength
λc
1260
1360
nm
Receiver Sensitivity
-23
dBm
3
Receiver Overload
-3
dBm
3
LOS De-Assert
LOSD
-24
dBm
LOS Assert
LOSA
-35
dBm
LOS Hysteresis
1
4
dB
Data Output Swing Differential
Vout
400
1800
mV
4
LOS
High
2.0
Vcc
V
Low
0.8
V
Notes:
The optical power is launched into SMF.
PECL input, internally AC-coupled and terminated.
Measured with a PRBS 27-1 test pattern @1250Mbps, BER ≤1×10-12.
