250 Mbps Transceiver in LC
FB2M5LVR
DATA SHEET
650 nm 250 Mbps Fiber Optic
Transceiver with LC Termination
LVDS I/O
IEC 61754-20 Compliant
FEATURES
DESCRIPTION
•
LC click lock mechanism for confident connections
•
Compatible with 8B/10B encoding schemes:
250 Mbps is the NRZ symbol rate
•
Resonant Cavity LED (RCLED) at red 650 nm with
small emission aperture suitable for POF
•
Integrated CMOS driver IC for RCLED
Firecomms industrial LC connector has a small
form factor housing, compliant with IEC 61754-20,
which includes a pair of transceiver components to
provide instant termination for Plastic Optical
Fiber (POF) terminated in LC plug assemblies. The
LC system offers compact termination ideal for
rack mounted applications.
•
High sensitivity CMOS receiver IC and PIN diode
•
Integrated optics to efficiently focus and direct light
•
Low power consumption with power saving features
•
-20° to +85°C operating range
•
RoHS compliant
APPLICATIONS
Table 1
APPLICATIONS
Application
Industrial and Robotic Links
Standard
LVDS Bus
Distance
50 meters Step Index POF
Speed
250 Mbps
[1]
Note:
1. Depending on the installation conditions.
FB2M5LVR Revision A
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
The LC features a reassuring clear click when
connected. This version of LC system carries a pair
of high-speed Fiber Optic Transceivers (FOTs)
designed to provide up to 250 Mbps data links
over POF in industrial environments. The FOTs are
compatible with low-voltage differential signalling
(LVDS) for seamless integration into existing logic
bus structures,
and are ideal for
use with an
FPGA or ASIC.
The transceiver
has an electrical
power saving feature. In the transmitter, the
driver IC goes into a sleep state and the RCLED is
switched off if there is no data or toning on the
input bus. Similarly if there is no optical signal
present, the RX IC will switch into sleep mode and
power consumption is reduced to less than 40uA.
FB2M5LVR
DATA SHEET 2
SPECIFICATIONS
Table 2
ABSOLUTE MAXIMUM RATINGS
These are the absolute maximum ratings at or beyond which the FOT can be expected to be damaged.
Parameter
Symbol
Minimum
Maximum
Unit
Storage Temperature
T stg
-40
85
°C
Operating Temperature
T op
-20
85
°C
[1]
Soldering Temperature
T sld
Supply Voltage
VR
Receiver Optical Overload
Storage Conditions
(Moisture Sensitivity Level)
[1]
260
°C
4.5
V
P OL
0
dBm
MSL
2a
JEDEC20D
-0.5
Notes:
1. 260°C, 5s 3 times, at least 2.2 mm away from lead root.
FIGURE 1
LC transceiver electronic block diagram
FB2M5LVR Revision A
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
FB2M5LVR
DATA SHEET 3
SPECIFICATIONS (continued)
Table 3
TRANSMITTER ELECTRICAL AND OPTICAL CHARACTERISTICS
Test Conditions:
1. Test data was validated over the full temperature range of -20°C to +85°C, and over the supply range of 2.97V to 3.63V.
2. Test data represents operation at the maximum data rate of 250 Mbps using a PRBS7 test pattern (8B/10B encoding)
unless otherwise stated.
3. Optical power is measured when coupled into 0.5 m of a 1 mm diameter 0.5 NA plastic fiber.
Parameter
Symbol
Minimum
Typical
Maximum
Unit
DC Supply Voltage
Vcc
3.0
3.3
3.6
V
Operating Current Consumption
Icc
37
52
mA
Sleep State Current Consumption
I Sleep
20
40
µA
250
Mbps
5
pF
Data Rate
Baud Rate
Data Input Capacitance
C IN
Data Input Resistance
(Single-Ended)
R IN
Input Common-Mode Range
10
5
kΩ
V IN-BIAS
GND+0.8
V CC -0.8
V
Input Voltage Swing
V IN-SWING
100
1200
mV
Minimum Differential Voltage Swing to
Ensure Wake-Up
Wake-up
Input
50
Wake-Up Time Delay
80
µs
20
µs
660
670
nm
23
30
nm
-2.0
dBm
2.8
ns
0.6
ns
1250
µW
1.6
ns
5
Optical Power OFF Delay
Peak Wavelength
0.02
λ peak
Spectral Bandwidth (FWHM)
[3]
640
∆λ
Average Optical Power
P
Optical Rise Time (20%-80%)
tR
Optical Fall Time (80%-20%)
tF
0.3
OMA
160
Optical Modulation Amplitude (OMA)
Total Jitter
FB2M5LVR Revision A
mV
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
-10
2.0
590
FB2M5LVR
DATA SHEET 4
SPECIFICATIONS (continued)
Table 4
RECEIVER CHARACTERISTICS
Test Conditions:
1. Test data was validated over the full temperature range of -20°C to +85°C, and over the supply range of 2.97V to 3.63V.
2. Test data represents operation at the maximum data rate of 250 Mbps using a PRBS7 test pattern (8B/10B encoding)
unless otherwise stated.
3. Optical power was coupled from a minimum 0.5 m length of 1 mm diameter core and 0.5 NA step index plastic optic fiber.
Parameter
Symbol
Minimum
Typical
Maximum
Unit
DC Supply Voltage
Vcc
3.0
3.3
3.6
V
Operating Current Consumption
Icc
34
36
40
mA
Sleep State Current Consumption
I Sleep
2
20
25
µA
Output Impedance Between D and D
Offset Common Mode Voltage
V ocm
Output Differential Voltage Swing
Receivable Optical Power Sensitivity
(SD Assert Level )
300
100
Ohm
1.2
V
350
400
mV
-24
-22
dBm
0
dBm
Maximum Allowed Optical Power
Rise Time (10%-90%)
1.0
2.5
ns
Fall Time (90%-10%)
1.0
2.0
ns
Wake Up Time from Sleep State
10
100
µs
FB2M5LVR Revision A
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
FB2M5LVR
DATA SHEET 5
SPECIFICATIONS (continued)
Table 5
TRANSCEIVER PIN DESCRIPTION
Pin
Name
Symbol
TRANSMITTER
1
EMI-GND
GND
2
Data Input (Negative)
TD-
3
Data Input (Positive)
TD+
4
Ground Pin
GND
5
DC Power Input Pin
Vcc
6
Ground Pin
[1]
[1]
GND
RECEIVER
7
DC Power Input Pin
Vcc
8
Ground Pin
GND
9
Signal Detect Output
SD
10
Data Output (Negative)
RD-
11
Data Output (Positive)
RD+
12
EMI-GND
GND
Notes:
1. Both ground pins must be connected to the ground plane on the PCB. These pins are not connected internally.
FIGURE 2
LC connector with dust plug, open for connection, and with LC plug inserted
FB2M5LVR Revision A
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
FB2M5LVR
DATA SHEET 6
APPLICATION CIRCUIT
FIGURE 3
Interface circuit schematic to AC couple to a PHY, FPGA or ASIC IC where the IC will not accept a
common mode voltage of 1.2V
Notes:
1. The transmitter (TX) and receiver (RX) are electrically shielded from each other to prevent crosstalk. To be effective this shield must be
grounded.
2. Both GND pins of the TX FOT must be connected to GND (they are not connected internally).
3. Power line capacitors should be located as close as possible to the FOT's DC power PINs.
4. The data lines are impedance-matched differential pairs. The PCB layout for these tracks must comply to IEEE standards for high-speed
data and impedance matching.
FB2M5LVR Revision A
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
FB2M5LVR
DATA SHEET 7
MECHANICAL DATA
11,9
3,4
2,8
2,4
FIGURE 4
Multiple views of the LC connector
Side View
Front View
Ø1,3 (2x)
12
10
5,4
13,9
11
16,5
7
Ø1,5 (10x)
12,9
9
8
6
5
4
3
2
Top View
1
Ø1,0 (10x)
Ø0,8 EMI Gnd (2x)
PCB Hole Details
Ø0,80 EMI Gnd (2x)
16,10
3,21
9,68
Edge of PCB
Gnd
Vcc
Gnd
TD+
TDGnd
8,05
6
5
4
3
2
1
6,46
5,19
3,92
2,65
1,38
Gnd
RD+
RDSD
Gnd
Vcc
8,05
12
11
10
9
8
7
6,46
5,19
3,92
2,65
1,38
2,54
FIGURE 5
Mechanical dimensions of the LC connector and PCB footprint, which is a top view. General
dimensional tolerance is ±0.2mm.
FB2M5LVR Revision A
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
FB2M5LVR
DATA SHEET 8
PACKING INFORMATION
Components are packed in PVC anti-static tubes in moisture barrier bags. Bags should be opened only in staticcontrolled locations, and standard procedures should be followed for handling moisture sensitive components.
Table 6
PACKING INFORMATION
Components per Tube
25
Tube Length
440 mm
Tube Height
27.4 mm
Tube Width
19.4 mm
Tubes per Bag
10
Bags per Inner Carton
1
Inner Carton Length
588 mm
Inner Carton Height
82 mm
Inner Carton Width
147 mm
Weight per Inner Carton, Complete
1.7 Kg
Components per Inner Carton
250
Inner Cartons per Outer Carton
4
Outer Carton Length
600 mm
Outer Carton Height
179 mm
Outer Carton width
300 mm
Weight per Outer Carton, Complete
8.1 Kg
Components per Outer Carton
1,000
Part Name: LC Connector
Lot No. 8331550001
Part No.: FB2M5LVR
Date Code: 2312
Quantity: 25
L
FIGURE 6
Packing tube for the Firecomms transceiver
ORDERING INFORMATION
Table 7
ORDERING INFORMATION
Part Number
FB2M5LVR
Name
Industrial LC Transceiver, for
2. 2 mm POF, Black
Description
650 nm RCLED-Based Transceiver in LC connector,
Color Black, For Use with LC Plugs Containing POF
Firecomms Ltd. • 2200 Airport Business Park • Cork, Ireland • Ph +353 (21) 4547100 • Fax +353 (21) 4322657 • www.firecomms.com
FB2M5LVR Revision A
Firecomms assumes no responsibility for inaccuracies or omissions in the information contained in this document.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.
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