- Linktel Technologies-Explorer of Datacenter Transceivers

LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
Product Features

Compliant with IEEE Std 802.3-2005,
Gigabit Ethernet 1000Base-LX

Compliant with SFF-8074i andSFF-8472, revision 9.5

Compliant with Fiber Channel FC- PI-2 Rev.8.0

Compliant with SFP MSA Specification

Digital Diagnostic Monitoring available

Uncooled 1310nm Fabry-Perot (FP)Laser

Up to 1.25Gb/s bi-directional data links

Duplex LC connector compliant

Single +3.3V DC power supply

Hot-pluggable SFP footprint

Class 1 laser safety certified

Operating temperature Options
Applications
-
(Commercial) -10oC to +70oC
-
(Extended) -10oC to +85oC
-
(Industrial) -40oC to +85oC

Up to 20km on 9/125µm SMF

RoHS6 Compliant

Gigabit Ethernet 1000Base-LX

1.0625Gb/s Fiber Channel

Enterprise Router

Switch to Switch Interface

Other Optical Links
Descriptions
LX1022C(E/I)DS SFP transceivers, according to Small Form Factor Pluggable Multi-Sourcing Agreement
(MSA) SFF-8074i and SFF-8472, revision 9.5, are designed for data communication on single mode fiber up to
20km. They are compliant with IEEE Std 802.3-2005 Gigabit Ethernet 1000Base-LX and Fibre Channel FCPI-2 Rev.8.0.
LX1022C(E/I)DS SFP transceivers offer a wide range of design options, including Digital Diagnostic
Monitoring (DDM) features and three temperature options (commercial, extended or industrial).
LX1022C(E/I)DS are compliant with RoHS.
Ordering Information
Table 1. Ordering Information
Part Number
Transmitter
Output Power
Receiver
Sensitivity
Reach
Temp
DDM
RoHS
70 oC
Available
Compliant
LX1022CDS
1310nm FP
-9 ~ -3dBm
PIN
< -23dBm
20km
-10 ~
LX1022EDS
1310nm FP
-9 ~ -3dBm
PIN
< -23dBm
20km
-10 ~ 85 oC
Available
Compliant
20km
85 oC
Available
Compliant
LX1022IDS
1310nm FP
-9 ~ -3dBm
PIN
< -23dBm
-40 ~
Pin Description
1
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
Table 2. Pin Description
Pin
Name
1
VeeT
2
TX Fault
3
Function/Description
Transmitter Ground
Engagement order
(Insertion)
1
Notes
-
Transmitter Fault Indication
3
1
TX Disable
Transmitter Disable-Module disables on high or open
3
2
4
MOD-DEF2
Module Definition 2-Two wire serial ID interface
3
3
5
MOD-DEF1
Module Definition 1-Two wire serial ID interface
3
3
6
MOD-DEF0
Module Definition 0-Grounded in module
3
3
7
Rate Select
Not Connected
3
-
8
LOS
Loss of Signal
3
4
9
VeeR
Receiver Ground
1
-
10
VeeR
Receiver Ground
1
-
11
Veer
Receiver Ground
1
-
12
RD-
Inverse Received Data out
3
5
13
RD+
Received Data out
3
5
14
VeeR
Receiver Ground
1
-
15
VccR
Receiver Power - +3.3V±5%
2
6
16
VccT
Transmitter Power - +3.3 V±5%
2
6
17
VeeT
Transmitter Ground
1
-
18
TD+
Transmitter Data In
3
7
19
TD-
Inverse Transmitter Data In
3
7
20
VeeT
Transmitter Ground
1
-
Notes:
1.
TX Fault is open collector/drain output which should be pulled up externally with a 4.7KΩ-10KΩ resistor on the host board to
supply < VccT +0.3V or VccR + 0.3V. When high, this 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 input is used to shut down the laser output per the state table below. It is pulled up within the module with a
4.7KΩ-10KΩ resistor.
3.
Low (0 – 0.8V):
Transmitter on
Between (0.8V and 2V):
Undefined
High (2.0 – VccT):
Transmitter Disabled
Open :
Transmitter Disabled
Mod-Def 0, 1, 2. These are the module definition pins. They should be pulled up with a 4.7KΩ-10KΩ resistor on the host
board to supply less than VccT+0.3V or VccR+0.3V.
Mod-Def 0 is grounded by the module to indicate that the module is present.
Mod-Def 1 is clock line of two wire serial interface for optional serial ID.
Mod-Def 2 is data line of two wire serial interface for optional serial ID.
4.
LOS (Loss of signal) is an open collector/drain output which should be pulled up externally with a 4.7KΩ-10KΩ resistor on
the host board to supply <VccT+0.3V or VccR+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.
2
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
5.
RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated
with 100Ω differential at the user SERDES. The AC coupling is done inside the module and thus not required on the host
board.
6.
VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V±5% at the SFP connector pin. The
in-rush current will typically be no more than 30mA above steady state supply current after 500ns.
7.
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 inside the module and is thus not required on host board.
Figure 1. Diagram of Host Board Connector Block Pin Numbers and Names
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in
excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.
Table 3. Absolute Maximum Ratings
Parameter
Symbol
Minimum
Maximum
Unit
Storage Temperature
TS
-40
85
o
Relative Humidity
RH
5
95
%
Supply Voltage
VCC
-0.5
4.0
V
C
Recommended Operating Conditions
Table 4. Recommended Operating Conditions
3
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Rev.2.0
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
Parameter
Operating Case Temperature
Symbol
Min
Typ
Max
LX1022CDS
TC
-10
25
70
o
C
LX1022EDS
TC
-10
25
85
o
C
LX1022IDS
TC
-40
25
85
o
C
VCC
3.135
3.3
3.465
V
-
0.1
-
1.25
Gb/s
Supply Voltage
Data Rate
Unit
Transceiver Electrical Characteristics
Table 5. Transceiver Electrical Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Notes
Icc
-
-
220
mA
-
-
-
800
mW
-
-
300
-
2200
mVP-P
1
-
600
-
1200
mVP-P
2
VOH
2.0
-
Vcc
V
3
VOL
0
-
0.8
V
-
VIH
2.0
-
Vcc
V
4
VIL
0
-
0.8
V
-
Module Supply Current
PD
Power dissipation
Transmitter Differential Input
Voltage (TD +/-)
Receiver Differential Output Voltage (RD
+/-)
Low speed output:
Transmitter Fault(TX_FAULT) /
Loss of Signal (LOS)
Low speed iutput:
Transmitter Disable (TX_DISABLE),
MOD_DEF 1, MOD_DEF 2
Notes:
1.
Internally AC coupled and terminated to 100Ω differential load.
2.
Internally AC coupled, but requires a 100Ω differential termination or internal to Serializer/Deserializer.
3. Pulled up externally with a 4.7KΩ-10KΩ resistor on the host board to VCCT,R.
4.
Mod_Def1 and Mod_Def2 must be pulled up externally with a 4.7KΩ-10KΩ resistor on the host board to VCCT,R.
Transmitter Optical Characteristics
Table 6. Transmitter Optical Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Notes
Launch Optical Power
Po
-9
-6
-3
dBm
-
Center Wavelength Range
λc
1260
1310
1360
nm
-
Extinction Ratio
EX
9
-
-
dB
-
Spectral Width(RMS)
Δλ
-
-
4
nm
-
Total Jitter
TJ
-
-
266
ps
-
Dispersion Penalty
-
-
-
1
dB
-
Trise/Tfall
-
-
260
ps
-
Poff
-
-
-45
dBm
-
Optical Rise/Fall Time
Pout @TX-Disable Asserted
Eye Diagram
IEEE Std 802.3-2005 Gigabit Ethernet 1000Base-LX compatible
Receiver Optical Characteristics
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Rev.2.0
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
Table 7. Receiver Optical Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Notes
Receiver Sensitivity
S
-
-
-23
dBm
1
Receiver Overload
POL
-3
-
-
dBm
1
Optical Return Loss
ORL
12
-
-
dB
-
LOS De-Assert
LOSD
-
-
-24
dBm
-
LOS Assert
LOSA
-35
-
-
dBm
-
-
0.5
3
5
dB
-
LOS Hysteresis
Notes:
1. Measured with PRBS 27-1 test pattern, 1.25Gb/s, EX=9dB, BER<10-12.
Timing characteristic
Table 8. Receiver Optical Characteristics
Parameter
Symbol
Minimum
Typical
Maximum
Unit
Notes
Tx_disable assert time
T_off
-
-
10
us
-
Tx_disable negate time
T_on
-
-
1
ms
-
Time to initialize,include reset
of TX_FAULT
T_init
-
-
300
ms
-
TX_FAULT from fault to assertion
T_fault
-
-
100
us
-
Tx_disable time to start reset
T_reset
10
-
-
us
-
Receiver LOS Assert Time(on to off)
T_D,RX_LOS
-
-
80
us
-
Receiver LOS Assert Time(off to on)
T_A,RX_LOS
-
-
80
us
-
I2C_Clock
-
-
100
kHz
-
Serial I2C Clock Rate
Digital Diagnostic Memory Map
5
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Rev.2.0
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
Figure 2. Digital Diagnostic Memory Map Specific Data Field Descriptions
EEPROM Serial ID Memory Contents
The SFP MSA defines a 256-byte memory map in EEPROM describing the transceiver’s capabilities, standard
interfaces, manufacturer, and other information, which is accessible over a 2 wire serial interface at the 8-bit
address 1010000X (A0h), and the clock frequency up to 100KHz. The memory contents are shown in Table 9.
Table 9. Serial ID Memory Contents
Data
Address
Name of Field
Contents(Hex)
Description
0
Identifier
03
SFP
1
Ext. Identifier
04
SFP function is defined by serial ID
2
Connector
07
LC
3-10
Transceiver
00 00 00 02 12 00
01 01
Transmitter Code
11
Encoding
01
8B10B
12
BR, Nominal
0D
1.25Gb/s
13
Reserved
00
14
Length (9μm) km
14
20km
15
Length (9μm) 100m
C8
20000m
16
Length (50μm) 10m
00
17
Length(62.5μm)10m
00
18
Length (Copper)
00
19
Reserved
00
20-35
Vendor name
4C 49 4E 4B 54
45 4C 20 20 20
20 2020 20 20 20
36
Reserved
00
37-39
Vendor OUI
00 00 00
“LINKTEL”(ASCII)
6
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
40-55
Vendor PN
4C 58 31 30 32 32
xx 44 53 20 20 20 20
20 20 20
“LX1022xDS ” (ASCII)
56-59
Vendor rev
31 2E 30 20
Rev 1.0 ( ASCII)
60-61
Wavelength
05 1E
1310nm
62
Reserved
00
63
CC BASE
xx
Check sum of bytes 0 - 62
64-65
Options
00 1A
LOS, TX_FAULT and TX_DISABLE
66
BR, max
00
67
BR, min
00
68-83
Vendor SN
84-91
Vendor date code
92
Diagnostic type
68
Diagnostics (Internal. Cal)
93
Enhanced option
B0
Diagnostics(Optional Alarm/warning flags, Soft TX_FAULT
and Soft TX_LOS monitoring)
94
SFF-8472
02
Diagnostics(SFF-8472 Rev 9.5)
95
CC_EXT
xx
Check sum for bytes 64-94
96-255
xx xx xx xx xx xx xx
xx xx xx xx xx xx xx
xx xx
xx xx xx xx xx xx 20
20
ASCII
Year (2 bytes), Month (2 bytes), Day (2 bytes)
00
Note: The “xx” byte should be filled in according to practical case. For more information, please refer to the related document of
SFF-8472 Rev 9.5.
Diagnostic Monitor Specifications
The digital diagnostic monitoring interface also defines another 256-byte memory map in EEPROM, which
makes use of the 8 bit address 1010001X (A2h). Please see Figure 2. For detail EEPROM information, please
refer to the related document of SFF-8472 Rev 9.5. The monitoring specification of this product is described in
Table 10.
Table 10. Diagnostic Monitor Specifications
Parameter
Range
Accuracy
Calibration
LX1022CDS
-15 to +80°C
±3°C
Internal
LX1022EDS
-15 to +95°C
±3°C
Internal
LX1022IDS
-40 to +95°C
±3°C
Internal
Voltage
3.0 to 3.6V
±3%
Internal
Bias Current
0 to 60mA
±10%
Internal
TX Power
-10 to -2dBm
±3dB
Internal
RX Power
-24 to -2dBm
±3dB
Internal
Temperature
Required Host Board Components
The MSA power supply noise rejection filter is required on the host PCB to meet data sheet performance. The
7
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
MSA filter incorporates an inductor which should be rated 400mA DC and 1Ω serial resistance or better. It
should not be replaced with a ferrite. The required filter is illustrated in Figure 3.
The MSA also specifies that 4.7KΩ to 10KΩ pull-up resistors for TX_FAULT, LOS, and MOD_DEF0,1,2 are
required on the host PCB. Figure is the suggested transceiver/host interface.
Figure 3 shows the recommended host board power supply circuit.
1μH
VccT
0.1μF
SFP Module
1μH
3.3V
VccR
0.1μF
10μF
10μF
0.1μF
Host Board
Figure 3. Recommended Host Board Power Supply Circuit
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
Recommended Application Interface Circuit
Host Board
SFP Module
VccT
Vcc (+3.3V)
10KΩ
4.7KΩ to 10KΩ
TX Disable
TX Fault
50Ω
SerData Out+
TD +
SERDES IC
Protocol IC
SerData Out-
50Ω
TD -
SerData In+
50Ω
RD +
SerData In-
50Ω
RD -
100Ω
Laser
driver
100Ω
Amplifier
LOS
Vcc (+3.3V)
4.7KΩ to 10KΩ
MOD_DEF2
EEPROM
MOD_DEF1
MOD_DEF0
RGND
Figure 4. Recommended Application Interface Circuit
Mechanical specifications
13.4
Unit:mm
0.9
14.9
55.65
13.7
8.5
0.8
45
2.54
1.9
12.4
5.5
Figure 5. Outline Drawing
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
PCB layout recommendation
Figure 6. PCB layout recommendation
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Rev.2.0
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LX1022xDS
100Mb/s to 1.25Gb/s Single-Mode SFP Transceiver
1000BASE-LX / 1.0625Gb/s Fiber Channel
For More Information
Linktel Technologies Co., Ltd
sales@linkteltech.com
http://www.linkteltech.com
Linktel China
No 20 University Science Park Road,
East-Lake Hi-tech Development Zone, Wuhan, China
Tel: +86 27-87929302
Linktel USA
3391 Ingersoll Ct., San Jose, CA 95148
Tel: +1-408-2613988
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