The PDT-SFP-03-1G-850-0055 is an industrial spec low-cost, high-performance Small Form Pluggable (SFP) transceiver which is specifically designed for fiber communications with up to 1.25Gbps data rate, using MMF, over a distance of up to 550m.
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 a VCSEL transmitter, a PIN photodiode, integrated with a trans-impedance pre-amplifier, and an MCU control unit.
The module is fully compliant with Class I Laser Safety Requirements.
Access to internal Digital Diagnostic Memory Maps is possible using a 2-wire serial interface at addresses A0h and A2h.
This is the industrial variant of this product and has a wider temperature range than the commercial product variant, which is also available as part of the Commercial SFP Product Line.
Features:
Up to 1.25Gbps Bi-Directional Data Link
850nm VCSEL laser and PIN Photodetector
Supports Links up to 550m with 50/125µm MMF
Supports Links up to 300m with 62.5/125µm MMF
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
Full Metal Case for Low EMI
0°C~+70°C Operating Temperature
-40C~+85°C Storage Temperature
Weight
0.05 kg
Dimensions
10 × 5 × 2 cm
Form Factor
SFP
RJ45
N/A
Fiber Mode
MMF
Laser Wavelength
850nm
Speed
1 Gbps
Transmission Range
550m
Operating Temp
-40~+85°C
Storage Temperature
-40°C~+85°C
Condition
New
Manufacturer
Parallax Digital Technologies
Warranty
2 Years
Block Diagram:
Pin Definitions:
Pin
SignalName
Description
PlugSeq.
Notes
1
VEET
Transmitter Ground
1
2
TX FAULT
Transmitter Fault Indication
3
Note1
3
TX DISABLE
Transmitter Disable
3
Note2
4
MOD_DEF(2)
SDA Serial Data Signal
3
Note3
5
MOD_DEF(1)
SCL Serial Clock Signal
3
Note3
6
MOD_DEF(0)
TTL Low
3
Note3
7
Rate Select
Not Connected
3
8
LOS
Loss of Signal
3
Note 4
9
VEER
Receiver ground
1
10
VEER
Receiver ground
1
11
VEER
Receiver ground
1
12
RX-
Inv. Received Data Out
3
Note 5
13
RX+
Received Data Out
3
Note 5
14
VEER
Receiver ground
1
15
VCCR
Receiver Power Supply
2
16
VCCT
Transmitter Power Supply
2
17
VEET
Transmitter Ground
1
18
TX+
Transmit Data In
3
Note 6
19
TX-
Inv. Transmit Data In
3
Note 6
20
VEET
Transmitter Ground
1
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
830
850
860
nm
Spectral Width (RMS)
σ
0.85
nm
Average Output Power
Pout
-9.5
-3.5
dBm
1
Extinction Ratio
ER
9
dB
Optical Rise/Fall Time
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
770
860
nm
Receiver Sensitivity
-18
dBm
3
Receiver Overload
0
dBm
3
LOS De-Assert
LOSD
-18
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
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.
