CSF-34(43)12-20D
1.25G 1310/1490nm
Compact SFP Transceiver
PRODUCT FEATURES
l
1250Mbps Typical Data Rate and compliant to
1000Base BX20 IEEE802.3ah
l
1310nm FP laser
transmitter for CSF-3412-20D
1490nm DFB laser transmitter for CSF-4312-20D
l
PIN photo-detector
l Up to 20km
on 9/125µm SMF
l Hot-pluggable CSFP footprint
l LC/UPC
type pluggable optical interface
l Achieve
operational compatibility with conventional SFP
l Metal
enclosure, for lower EMI
l RoHS compliant and lead-free
l Single
+3.3V power supply
l Support
Digital Diagnostic Monitoring interface
l Compliant with SFF-8472
l Case operating temperature 0°C to +70°C
APPLICATIONS
l
Gigabit
Ethernet(1000BASE-BX20)
l Point to Point FTTH Application
l Switched Backplane Applications
l Router/Server Interface
l Switch to Switch Interface
l Other Optical Links
PRODUCT DESCRIPTION
SINOVO’s CSF-34(43)12-20D
transceivers are compatible with the Compact Small
Form- Factor Pluggable (CSFP) Multi-Source Agreement (MSA) option 2, The transceiver consists of 2-channel Bi-directional
Optical Transceiver unit with five sections: the LD driver,
the limiting amplifier, the
digital diagnostic monitor, the 1310nm FP laser (the 1490nm DFB laser) and the PIN photo-detector .The module
data link up to 20KM in 9/125um single mode fiber.
The optical
output can be disabled by a TTL logic high-level input of Tx Disable, and the
system also can disable the module via I2C. Tx Fault is provided to indicate
that degradation of the laser. Loss of signal (LOS) output is provided to
indicate the loss of an input optical signal of receiver or the link status
with partner. The system can also get the LOS (or Link)/Disable/Fault
information via I2C register access.
Conventional SFP will function when
plugged into a C-SFP socket, at the same time no damage to C-SFP and host board
if C-SFP module is plugged into a conventional SFP socket
Ordering information
|
Product part Number
|
Data Rate
(Gbps)
|
Media
|
Wavelength
(nm)
|
Transmission
Distance(km)
|
Temperature Range（Tcase）（℃）
|
|
|
CSF-34(43)12-20D
|
1.25
|
Single mode fiber
|
1310/1490(1490/1310)
|
20
|
0~70
|
commercial
|
Ⅰ. Pin Descriptions
|
Pin#
|
Name
|
Function
|
Notes
|
|
1
|
VEE
|
Transceiver Ground
|
VEE may be internally connected within the SFP
module
|
|
2
|
TX FAULT
|
Transmitter Fault Indication
|
TX Fault is an open collector/drain output, which
should be pulled up with a 4.7K–10K resistor on the host board. Note 1 for
more information
|
|
3
|
TX1_ Disable
|
Transmitter Disable of Ch A
|
Module channel A disables function
|
|
4
|
MOD-DEF2
|
Two-wires interface Data
|
2 wire serial ID interface, SDA
|
|
5
|
MOD-DEF1
|
Two-wires interface Clock
|
2 wire serial ID interface, SCL
|
|
6
|
TD2-
|
Inverted Transmit Data Input of Ch B
|
These are the differential transmitter puts. 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
|
|
7
|
TD2+
|
Transmit Data
Input of Ch B
|
|
|
8
|
LOS1
|
Loss of Signal of Ch A
|
Loss of Signal detected function. Note 2 for more
information.
|
|
9
|
RD2+
|
Received Data
Output of Ch B
|
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.
|
|
10
|
RD2-
|
Inverted
Received Data Output of Ch B
|
|
|
11
|
VEE
|
Transceiver Ground
|
VEE may be internally connected within the SFP
module.
|
|
12
|
RD1-
|
Inverted
Received Data Output of Ch A
|
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.
|
|
13
|
RD1+
|
Received Data Output of Ch A
|
|
|
14
|
LOS2
|
Loss of Signal of CH B
|
Loss of Signal detected function. Note 2 for more
information.
|
|
15
|
VCCR
|
Receiver Power
|
3.3V± 5%. Note 3 for more information
|
|
16
|
VCCT
|
Transmitter Power
|
3.3V± 5%. Note 3 for more information
|
|
17
|
TX2_ Disable
|
Transmitter Disable of Ch B
|
Module channel B disables function
|
|
18
|
TD1+
|
Transmit Data Input of Ch A
|
These are the differential transmitter puts. 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
|
|
19
|
TD1-
|
Inverted Transmit
Data Input of Ch A
|
|
|
20
|
VEE
|
Transceiver Ground
|
VEE may be internally connected within the SFP
module.
|
Note 1: When
high, output indicates a laser fault of some kind either in Channel A or
Channel B. The Host shall read Channel A/B
for details: TX Fault from channel A
if bit 2 is set
in [A2H:110]; TX Fault from channel B if bit 2 is set in [B2H: 110].
Low indicates normal operation. In the low state, the output will be pulled to
< 0.8V.
Note 2: 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 < 0.4V.
Note 3: VccT VccR
are the power supplies. They are defined as 3.3V ±5% at the SFP connector pin.
Maximum supply current is 400Ma@3.3V. Vcc may be internally connected within
the SFP transceiver module.
Figure 2: Pin out of Connector Block on Host Board
II. Absolute Maximum Ratings
|
Parameter
|
Symbol
|
Min.
|
Typ.
|
Max.
|
Unit
|
Note
|
|
Storage Temperature
|
Ts
|
-40
|
|
85
|
ºC
|
|
|
Relative Humidity
|
RH
|
5
|
|
95
|
%
|
|
|
Power Supply Voltage
|
VCC
|
-0.5
|
|
4
|
V
|
|
|
Signal Input Voltage
|
|
-0.3
|
|
Vcc+0.3
|
V
|
|
|
Receiver Damage Threshold
|
|
3
|
|
|
dBm
|
|
III. Recommended Operating Conditions
|
Parameter
|
Symbol
|
Min.
|
Typ.
|
Max.
|
Unit
|
Note
|
|
Case Operating Temperature
|
Tcase
|
0
|
|
70
|
ºC
|
CSF-34(43)12-20D
|
|
Power Supply Voltage
|
VCC
|
3.13
|
3.3
|
3.47
|
V
|
|
|
Power Supply Current
|
ICC
|
|
|
450
|
mA
|
|
|
Power Supply Noise Rejection
|
|
|
|
100
|
mVp-p
|
100Hz to 1MHz
|
|
Data Rate
|
|
|
1.25/1.25
|
|
Gbps
|
TX Rate/RX Rate
|
|
Transmission Distance
|
|
|
|
20
|
KM
|
|
|
Coupled Fiber
|
Single
mode fiber
|
9/125um
SMF
|
||||
Ⅳ. Specification of Transmitter
|
Parameter
|
Symbol
|
Min.
|
Typ.
|
Max.
|
Unit
|
Note
|
|
Average
Output Power
|
POUT
|
-9
|
|
-3
|
dBm
|
Note
(1)
|
|
Extinction Ratio
|
ER
|
9
|
|
|
dB
|
|
|
Center Wavelength
|
λC
|
1260
|
1310
|
1360
|
nm
|
CSF-3412-20D
|
|
1480
|
1490
|
1500
|
CSF-4312-20D
|
|||
|
Spectrum Width (RMS)
|
σ
|
|
|
3.5
|
nm
|
FP Laser
(TX:1310nm)
|
|
Side Mode Suppression Ratio
|
SMSR
|
30
|
|
|
dB
|
DFB Laser
(TX:1490nm)
|
|
Spectrum Bandwidth(-20dB)
|
σ
|
|
|
1
|
nm
|
|
|
Transmitter OFF Output
Power
|
POff
|
|
|
-45
|
dBm
|
|
|
Differential
Line Input Impedance
|
RIN
|
90
|
100
|
110
|
Ohm
|
|
|
Output Eye Mask
|
Compliant with IEEE802.3 ah (class 1 laser safety)
|
|
Note
(2)
|
|||
Note (1): Measure at 2^7-1 NRZ PRBS
pattern
Note (2): Transmitter eye mask
definition, and eye mask diagram with at least 10% margin.
V. Specification of Receiver
|
Parameter
|
Symbol
|
Min.
|
Typ.
|
Max.
|
Unit
|
Note
|
|
Input Optical Wavelength
|
λIN
|
1480
|
1490
|
1500
|
nm
|
CSF-3412-20D
|
|
1260
|
1310
|
1360
|
CSF-4312-20D
|
|||
|
Receiver Sensitivity
|
PIN
|
|
|
-19.5
|
dBm
|
Note
(1)
|
|
Input Saturation Power (Overload)
|
PSAT
|
-3
|
|
|
dBm
|
|
|
Los Of Signal Assert
|
PA
|
-35
|
|
|
dBm
|
|
|
Los Of Signal De-assert
|
PD
|
|
|
-22
|
dBm
|
Note
(2)
|
|
LOS Hysteresis
|
PA-PD
|
0.5
|
2
|
6
|
dB
|
|
Note (1): Measured with Light source 1490nm(1310nm), ER=9dB; BER
=<10^-12 @PRBS=2^7-1 NRZ
Note (2): When LOS de-asserted, the RX data+/- output is signal
output.
VI. Electrical
Interface Characteristics
|
Parameter
|
Symbol
|
Min.
|
Typ.
|
Max.
|
Unit
|
Note
|
|
Transmitter
|
||||||
|
Total Supply Current
|
ICC
|
|
|
A
|
mA
|
Note
(1)
|
|
Transmitter Disable
Input-High
|
VDISH
|
2
|
|
Vcc+0.3
|
V
|
|
|
Transmitter Disable
Input-Low
|
VDISL
|
0
|
|
0.8
|
V
|
|
|
Transmitter Fault
Input-High
|
VTxFH
|
2
|
|
Vcc+0.3
|
V
|
|
|
Transmitter Fault
Input-Low
|
VTxFL
|
0
|
|
0.8
|
V
|
|
|
Receiver
|
||||||
|
Total Supply Current
|
ICC
|
|
|
B
|
mA
|
Note
(1)
|
|
LOSS Output
Voltage-High
|
VLOSH
|
2
|
|
Vcc+0.3
|
V
|
LVTTL
|
|
LOSS Output
Voltage-Low
|
VLOSL
|
0
|
|
0.8
|
V
|
|
Note
(1): A (TX) + B (RX) = 450mA (Not
include termination circuit)
VII.
Digital
Diagnostic Functions
SINOVO CSF-34(43)12-20D transceivers support the 2-wire serial
communication protocol as defined in the CSFP MSA. It is very closely related
to the E2PROM defined in the GBIC standard, with the same electrical
specifications.
The standard CSFP serial ID provides access
to identification information that describes the transceiver’s capabilities,
standard interfaces, manufacturer, and other information.
Additionally, SINOVO CSFP transceivers provide a unique
enhanced digital diagnostic monitoring interface, which allows real-time access
to device operating parameters such as transceiver temperature, laser bias
current, transmitted optical power, received optical power and transceiver
supply voltage. It also defines a sophisticated system of alarm and warning
flags, which alerts end-users when particular operating parameters are outside
of a factory set normal range.
The CSFP MSA defines a 256-byte memory map
in E2PROM that is accessible over a 2-wire serial interface at the 8 bit
address 1010000X (A0h) or 1011000X(B0h). The digital diagnostic monitoring
interface makes use of the 8 bit address 1010001X (A2h) or 1011001X(B2h), so
the originally defined serial ID memory map remains unchanged. The digital
diagnostic memory is defined as follow:
The operating and diagnostics information
is monitored and reported by a Digital Diagnostics Transceiver Controller
(DDTC) inside the transceiver, which is accessed through a 2-wire serial
interface. When the serial protocol
is activated, the serial clock signal (SCL, Mod Def 1) is generated by the
host. The positive edge clocks data into
the SFP transceiver into those segments of the E2PROM that are not
write-protected. The negative edge clocks data from the SFP transceiver. The
serial data signal (SDA, Mod Def 2) is bi-directional 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.
Digital diagnostics for the CSF-34(43)12-20D
are internally calibrated by default.
VIII.
Recommend Circuit Diagram
Note1：Recommendation
100Ω series resistance on host board.
IX. Mechanical
Specifications (Unit: mm)
X. Regulatory Compliance
|
Feature
|
Reference
|
Performance
|
|
Electrostatic
discharge（ESD）
|
IEC/EN
61000-4-2
|
Compatible with standards
|
|
Electromagnetic
Interference (EMI)
|
FCC
Part 15 Class B EN 55022 Class B (CISPR 22A)
|
Compatible with standards
|
|
ROHS
|
2002/95/EC
|
Compatible with standards
|
|
EMC
|
EN61000-3
|
Compatible with standards
|
Appendix A. Document Revision
|
Date
|
Description
|
|
|
1.0
|
2011-10-25
|
Preliminary
datasheet
|
|
2.0
|
2013-6-13
|
Change
“Receiver
Sensitivity” from -19 to -19.5dBm
|
Contact
info:
Shenzhen
Sinovo Telecom Co.,Ltd
TEL:+86(0)0755-3295
9919 FAX:+86(0)755 3295 9918
EMAIL: sales@sinovocorp.com
Factory
Add : 4~5F,NO.658,Meijing West Rd,Dalang Town,Dongguan City,
Guangdong,China
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