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Fiber optic patch cord, Fiber Optic Cable Manufacturer Since 2001

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1310nm SFP Transceiver 1.25G SM

SKU:
JFSFP-04
Brand:


Product Description

 

Feature
Data rate up to 1.25Gbps
1310 nm FP LD Transmitter
Transmitting distance from 10 km up to 30km
(Up to 40km if use DFB laser)
3.3V DC power supply
Duplex LC Connector Interface
Hot pluggable
Compliant with IEEE 802.3z
Compliant with SFP MSA
ROHS Compliant is available
Digital Diagnostic monitor interface compatible with SFF-8472 is available
Application
Gigabit Ethernet data link
Data storage networks
Optical access network
Other optical links
XDSL Application
Transmitter Section
The transmitter section consists of a high reliability 1310nm laser diode (FP) with back facet monitor photo detector (PD) in eye safety, which is mated to the Tx port of the fiber optic LC duplex receptacle. A driver IC converts differential input data signals into an analog current source that drives the LD, and the input data are ac coupled to the driver.
Receiver Section
The receiver section consists of a high-speed GaAs PIN photodiode (PD) and trans-impedance preamplifier, which is mated to the Rx port of the fiber optic LC duplex receptacle. The output of the PD drives the post-amplification, quantizing, and optical signal detection circuits. The receiver is equipped with the LOS monitoring function. The post-amplifier is AC coupled to the preamplifier and outsider. If a very low signal rate or a code which has significantly more low frequency content is used, sensitivity, jitter and pulse distortion could be degraded.

PECL Logic Level

Logic State
Unit
Min
Typ
Max
Low
V
VCC-1.84
-
VCC-1.60
High
V
VCC-1.10
-
VCC-0.90

 

 

 

TTLLogic Level

Logic State
Unit
Min
Typ
Max
Low
V
0
-
0.8
High
V
2.4
-
VCC

 

 

 

Pin Descriptions

Pin
Name
Description
Plug Sequence
Note
1
VEET
Transmitter Ground
1
 
2
TX Fault
Transmitter Fault Indication
3
1
3
TX Disable
Transmitter Disable
3
2
4
MOD-DEF2
Module Definition 2
3
3
5
MOD-DEF1
Module Definition 1
3
3
6
MOD-DEF0
Module Definition 0
3
3
7
Rate Select
Not Connected
3
 
8
LOS
Loss of Signal
3
4
9
VeeR
Receiver Ground
1
5
10
VeeR
Receiver Ground
1
5
11
VeeR
Receiver Ground
1
5
12
RD-
Inverse Received Data Out
3
6
13
RD+
Received Data Out
3
7
14
VeeR
Receiver Ground
1
5
15
VccR
Receiver Power
2
7
16
VccT
Transmitter Power
2
7
17
VeeT
Transmitter Ground
1
5
18
TD+
Transmit Data In
3
8
19
TD-
Inverse Transmit Data In
3
8
20
VeeT
Transmitter Ground
1
5

Note:
1.TX Fault is an open collector output, which should be pulled up with a 4.7k~10kilo-ohm resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 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 4.7k~10kilo-ohm resistor. Its states are:
Low (0~0.8V): Transmitter on (>0.8V, <2.0V): Undefined
High (2.0~3.465V): Transmitter Disabled
Open: Transmitter Disable
3. MOD-DEF 0,1,2 are the module definition pins. They should be pulled up with a 4.7k~10kilo-ohm 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 a4.7k~10kilo-ohm resistor on the host board to a voltage between 2.0V and Vcc+0.3V. Logic 0 indicates normal operation; logic 1 indicates loss of signal. In the low state, the output will be pulled to less than 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 100_ differential lines which should be terminated with 100_ (differential) at the user SERDES. The AC coupling 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 100_ differential termination inside the module. The AC coupling is done 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 - 600mVsingle-ended) be used for best EMI performance.

Absolute Maximum Ratings

Parameter
Symbol
Min
Max
Unit
Note
Storage Temperature
TS
-40
85
ºC
-
Operating Temperature
To
-40
85
ºC
-
Storage Relative Humidity
RHS
-
95
%
-
Power Supply
VCC
-
5.5
V
-
Lead Solder Temperature
TSLD
-
260
ºC
-
Lead Solder Duration
tSLD
-
10
s
-
Voltage on any input/output pin
VIO
0
VCC
V
-


Performance Specification

Transmitter Characteristics
Parameter
Symbol
min
Typical
Max
Unit
Note
Supply Voltage 
VCC
3.15
3.3
3.45
V
-
Operation Current
ICC
-
-
130
mA
-
Differential Input Voltage
VIN
400
-
1600
mV
-
Data Rate
Rate
-
1250
-
Mbps
-
Optical Output Power
Po
-8
-
-2
dBm
-
Extinction Ratio
ER
8.2
-
-
dB
-
Central Wavelength
1260
1310
1360
nm
-
Output Spectrum Width
-
-
4
nm
RMS
 
Optical Rise Time
Tr
-
-
0.26
ns
20%~80%
Optical Fall Time
Tf
-
-
0.26
ns
20%~80%
Eye Diagram
Compliant IEEE802.3z
 
 
Receiver Characteristics
Parameter
Symbol
min
Typical
Max
Unit
Note
Supply Voltage 
VCC 
3.14
3.3
3.47
V
-
Operation Current
IOC
-
-
120
mA
-
Differential Output Voltage
VOUT
400
-
2000
mV
1
Data Rate
Rate
-
1250
-
Mbps
-
Sensitivity
S
-
-
-23
dBm
2
Optical Input Overload
POL
-3
-
-
dBm
-
Central Wavelength
1100
-
1600
nm
-
 
SD (Signal Detected)
Optical  Decreased
-35
-
-
dBm
-
Optical Increased
 
-
-23
dBm
-
SD Hysterics
PH
0.5
-
5
dB
-
Note1: Internally AC coupled.
Note2: Average received power where the BER = 10 -12, measured with a 27-1 NRZ test pattern.
Power Supply
The Transceiver includes internal circuit components to filter power supply noise. Under some conditions of EMI and power supply noise, external power supply filtering may be necessary. If receiver sensitivity is found to be degraded by power supply noise, the filter network illustrated in the following figure may be used to improve performance. The values of the filter components are general recommendations and may be changed to suit a particular system environment. Shielded inductors are recommended.
 
Recommended Application Circuits
 
Note1: Internally AC coupled.
Note2: Average received power where the BER = 10 -12, measured with a 27-1 NRZ test pattern.
Ordering Information
Model No.
Data Rate
Wavelength
Laser Type
MediaType
Reach
Temp.(ºC)
JFSFP-LX-SM-10
1.25Gb/s
1310nm
FP
SMF
10 km
-40~85
JFSFP-LX-SM-20
1.25Gb/s
1310nm
FP
SMF
20 km
-40~85
JFSFP-LX-SM-30
1.25Gb/s
1310nm
FP
SMF
30 km
-40~85
JFSFP-LX-SM-40
1.25Gb/s
1310nm
DFB
SMF
40 km
-40~85

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