SFP CWDM Series
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
SFP-1GE-LX-EO
1.25Gbps SFP Transceiver
Features
 Operating data rate up to 1.25Gbps
 1310 nm FP LD Transmitter
 Distance up to 10km
 Single 3. 3V Power supply and TTL Logic
Interface
 Duplex LC Connector Interface
 Hot Pluggable
 Operating Case Temperature
Standard: 0℃~+70℃
Industrial:-40℃~+85℃
 Compliant with MSA SFP Specification
 Digital diagnostic monitor interface
Compatible with SFF-8472
Applications
 Gigabit Ethernet Switches and
Routers
 Fiber Channel Switch
Infrastructure
 XDSL Applications
 Metro Edge Switching
Product Description
The SFP-1GE-LX-EO single mode transceiver is small form factor pluggable module for bidirectional serial optical data communications such as Gigabit Ethernet 1000BASE-ZX
and Fiber Channel 1x SM-LC-L FC-PI. It is with the SFP 20-pin connector to allow hot
plug capability. This module is designed for single mode fiber and operates at a nominal
wavelength of 1310 nm.
The transmitter section uses a multiple quantum well laser and is a class 1 aser compliant
according to International Safety Standard IEC-60825. The receiver section uses an
integrated InGaAs detector preamplifier (IDP) mounted in an optical header and a limiting
post-amplifier IC.
The SFP-1GE-LX-EO is designed to be compliant with SFF-8472 SFP Multi-source
Agreement (MSA).
Page 1 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
Regulatory Compliance
Feature
Standard
Performance
Electrostatic Discharge (ESD)
to the Electrical Pins
Electromagnetic Interference
(EMI)
MIL-STD-883E Method
3015.7
Class 1(>500 V) Isolation
with the case
Compatible with
standards
Compatible with Class I
laser product. Compatible
with TμV standards
Laser Eye Safety
FCC Part 15 Class B
FDA 21CFR 1040.10 and
1040.11 EN60950, EN
(IEC) 60825-1,2
Component Recognition
UL and CUL
UL file E317337
Green Products
RoHS
RoHS6
Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Unit
Storage Temperature
TS
-40
+85
°C
Supply Voltage
VCC
-0.5
3.6
V
Recommended Operating Conditions
Parameter
Operating Case
Temperature
Power Supply
Voltage
Power Supply
Current
Surge Current
Baud Rate
Symbol
TA
Max.
Unit
+70
°C
3.45
V
ICC
300
mA
ISurge
+30
mA
SFP-LX10x
VCC
Min.
Typical
0
3.15
3.3
1.25
GBaud
Page 2 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
PERFORMANCE SPECIFICATIONS - ELECTRICAL
Parameter
Symbol
Min.
Typ.
Max
Unit
Notes
2500
mVp
115
ohms
2
3.45
V
0
0.8
V
2
Vcc+0.3
V
Io = 400µA;
Host Vcc
0
0.5
V
Io = -4.0mA
AC coupled
outputs
TRANSMITTER
LVPECL
Inputs(Differential)
Input Impedance
(Differential)
Tx_DISABLE Input
Voltage - High
Vin
400
Zin
85
Tx_DISABLE Input
Voltage - Low
Tx_FAULT Output
Voltage -- High
Tx_FAULT Output
Voltage -- Low
100
AC coupled
inputs
Rin > 100
kohms @ DC
RECEIVER
LVPECL Outputs
(Differential)
Output Impedance
(Differential)
Rx_LOS Output
Voltage - High
Rx_LOS Output
Voltage - Low
Vout
400
800
1200
mVpp
Zout
85
100
115
ohms
2
Vcc+0.3
V
lo = 400µA;
Host Vcc
0
0.8
V
lo = -4.0mA
MOD_DEF ( 0:2 )
VoH
2.5
VoL
0
V
0.5
V
With Serial ID
Optical and Electrical Characteristics
Parameter
Symbol
Min.
9µm Core Diameter SMF
Data Rate
Typical
Max.
Unit
10
Km
1.25
Gbps
Transmitter
Centre Wavelength
λC
Spectral Width (RMS)
σ
Average Output Power
P0ut
-10
Extinction Ratio
EX
9
Rise/Fall Time(20%~~80%)
tr/tf
1.2
ns
Total Jitter
TJ
56.5
ps
1260
1310
1360
nm
3
nm
-3
dBm
dB
Page 3 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
Output Optical Eye
IUT-T G.957 Compliant
Data Input Swing Differential
VIN
500
Input Differential Impedance
ZIN
90
TX Disable
100
2000
mV
110
Ω
Disable
2.0
VCC+0.3
Enable
0
0.8
Fault
2.0
VCC+0.3
Normal
0
0.8
TX_Fault
TX_Disable Assert Time
t_off
V
V
10
us
1600
nm
-20
dBm
110
Ω
2000
mV
Receiver
Centre Wavelength
λC
Receiver Sensitivity
PIN
Output Differential Impedance
PIN
90
Data Output Swing Differential
VOUT
370
Rise/Fall Time
Tr/tf
2.2
ns
LOS De-AssertS
LOSD
-24
dBm
LOS Assert
LOSA
LOS
1100
100
-40
dBm
High
2.0
VCC+0.3
LOW
0
0.8
V
Page 4 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
SFP Transceiver Electrical Pad Layout
Veet
4
5
6
7
8
9
10
Page 5 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
Pin Function Definitions
Pin
Num.
Name
FUNCTION
Plug
Seq.
1
VeeT
Transmitter Ground
1
2
TX Fault
Transmitter Fault Indication
3
Note 1
3
TX Disable
Transmitter Disable
3
Note 2, Module disables on high
or open
4
MOD-DEF2
Module Definition 2
3
Note 3, Data line for Serial ID.
5
MOD-DEF1
Module Definition 1
3
Note 3, Clock line for Serial ID.
6
MOD-DEF0
Module Definition 0
3
Note 3, Grounded within the module.
7
Rate Select
Not Connect
3
Function not available
8
LOS
Loss of Signal
3
Note 4
9
VeeR
Receiver Ground
1
Note 5
10
VeeR
Receiver Ground
1
Note 5
11
VeeR
Receiver Ground
1
Note 5
12
RD-
Inv. Received DataOut
3
Note 6
13
RD+
Received Data Out
3
Note 7
14
VeeR
Receiver Ground
1
Note 5
15
VccR
Receiver Power
2
3.3 ± 5%, Note 7
16
VccT
Transmitter Power
2
3.3 ± 5%, Note 7
17
VeeT
Transmitter Ground
1
Note 5
18
TD+
Transmit Data In
3
Note 8
19
TD-
Inv. Transmit Data In
3
Note 8
20
VeeT
Transmitter Ground
1
Note 5
Notes
NotesNotes:
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K –
10KΩ resistor on the host board. Pull up voltage between 2.0V and VccT, R+0.3V.
When high, output indicates a laser fault of some kind. Low indicates normal operation.
In the low state, the output will be pulled to < 0.8V.
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 – 10 KΩ resistor. Its states are:
Page 6 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
Low (0 – 0.8V): Transmitter on
(>0.8, < 2.0V): Undefined
High (2.0 – 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 – 10KΩ resistor on the host board. The pull-up voltage shall be VccT or VccR (see
Section IV for further details). 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 ModDef 2 is the data line of two wire serial interface for serial ID.
4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with
a 4.7K – 10K Ω resistor. Pull up voltage between 2.0V and VccT, R+0.3V. When high,
this output indicates the received optical power is below the worst-case receiver
sensitivity (as defined by the standard in use). Low indicates normal operation. In the
low state, the output will be pulled to < 0.8V.
5) VeeR and VeeT may be internally connected within the SFP module.
6)
RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω
differential lines which should be terminated with 100 Ω (differential) at the user SERDES.
The accoupling is done inside the module and is thus not required on the host board.
The voltage swing on these lines will be between 370 and 2000 mV differential (185 –
1000 mV single ended) when properly terminated.
7) VccR and VccT are the receiver and transmitter power supplies. They are defined
as 3.3V± 5% at the SFP connector pin. Maximum supply current is 300mA.
Recommended host board power supply filtering is shown below. Inductors with DC
resistance of less than 1 ohm should be used in order to maintain the required voltage
at the SFP input pin with 3.3V supply voltage. When the recommended supply-filtering
network is used, hot plugging of the SFP transceiver module will result in an inrush
current of no more than 30mA greater than the steady state value. VccR and VccT
may be internally connected within the SFP transceiver module.
8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential
lines with 100Ω differential termination inside the module. The AC coupling is done
Page 7 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
inside the module and is thus not required on the host board. The inputs will accept
differential swings of 500 – 2400 mV (250 – 1200mV single-ended), though it is
recommended that values between 500 and 1200 mV differential (250 – 600mV singleended) be used for best EMI performance.
EEPROM
The serial interface uses the 2-wire serial CMOS EEPROM protocol defined for the
ATMEL AT24C02/04 family of components. When the serial protocol is activated, the
host generates the serial clock signal (SCL). The positive edge clocks data into those
segments of the EEPROM that are not write protected within the SFP transceiver. The
negative edge clocks data from the SFP transceiver. The serial data signal (SDA) is bidirectional for serial data transfer. The host uses SDA in conjunction with SCL to mark
the start and end of serial protocol activation. The memories are organized as a series
of 8-bit data words that can be addressed individually or sequentially.
The Module provides diagnostic information about the present operating conditions.
The transceiver generates this diagnostic data by digitization of internal analog signals.
Calibration and alarm/warning threshold data is written during device manufacture.
Received power monitoring, transmitted power monitoring, bias current monitoring,
supply voltage monitoring and temperature monitoring all are implemented. The
diagnostic data are raw A/D values and must be converted to real world units using
calibration constants stored in EEPROM locations 56 – 95 at wire serial bus address
A2h. The digital diagnostic memory map specific data field define as following. For detail
EEPROM information, please refer to the related document of SFF 8472 Rev 9.3.
Page 8 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
Page 9 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
Recommend Circuit Schematic
RES1
TD+
RD+
Photodiode
RES 1=4.7k to 10k
Mechanical Specifications
Page 10 of 11
SFP-1GE-LX-EO
SFP Duplex LC, 1310nm FP LD SM Fiber, RoHS Compliant
Ordering information
Part No.
SFP-1GE-LX-EO
Data Rate
Laser
Fiber Type
Distance
1.25Gbps
1310nm FP
SMF
10Km
Optical
Interface
DDMI
LC
NO
* D--- DDMI
X
Interface
GBIC
SFP
X
X
X
X
X
X
Rate:
C:10/100/1000
X:Single Rate
Mode:
T:UTP
S:Muti-mode
L:Single mode 1310nm
Z:Single mode 1550nm
X
X
X
Digital Monitor
D:with DDM
Blank:without DDM
Distance:
Blank:550m
10:10Km
20:20Km
40:40Km
80:80Km
120:120Km
Page 11 of 11
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement