This document describes a BiDi cSFP optical transceiver module that operates at 1.25Gbps over single mode fiber with a maximum range of 40km. The module uses a DFB laser transmitter operating at 1490nm and a PIN photodiode receiver operating at 1310nm. It provides digital diagnostic monitoring of operating parameters and is compliant with relevant industry standards for optical transceivers.
Remember enjoying Keebler Grasshopper Cookies as a child? Well, what's old is now new. It's time for the next generation of kids to learn about these yummy "bug cookies"
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GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
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State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
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Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
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3. BO28C4334640D
BiDi cSFP 1.25G 1490nm/1310nm 40KM
RoHS Compliant Optical Transceiver
- 3 -
1. Absolute Maximum Ratings
Parameter Symbol Min. Typ. Max. Unit
Storage Temperature Ts -40 85 ºC
Storage Ambient Humidity HA 5 95 %
Power Supply Voltage VCC -0.5 4 V
Signal Input Voltage -0.3 Vcc+0.3 V
Receiver Damage Threshold +5 dBm
2. Recommended Operating Conditions
Parameter Symbol Min. Typ. Max. Unit Note
Case Operating Temperature Tcase
0 70 BO28C4334640D
-10 80 ºC BO28C4334640DEX
-40 85 BO28C4334640DIN
Ambient Humidity HA 5 70 %
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 1 MHz
Data Rate 1250/1250 Mbps TX Rate/ RX Rate
Transmission Distance 40 KM
Coupled Fiber Single mode fiber 9/125um SMF
3. Electrical Interface Characteristics
Parameter Symbol Min. Typ. Max. Unit Note
Transmitter
Total Supply Current ICC A mA 1
Transmitter Disable Input-High VDISH 2 Vcc+0.3 V
Transmitter Disable Input-Low VDISL 0 0.8 V
Transmitter Fault Input-High VDISL 2 Vcc+0.3 V
Transmitter Fault Input-Low VTxFH 0 0.8 V
Receiver
Total Supply Current ICC B mA 1
LOSS Output Voltage-High VLOSH 2 VCC+0.3 V
LVTTL
LOSS Output Voltage-Low VLOSL 0 0.8 V
Notes:
1. A + B = 450mA (without termination circuit)
4. BO28C4334640D
BiDi cSFP 1.25G 1490nm/1310nm 40KM
RoHS Compliant Optical Transceiver
- 4 -
4. Transmitter Specifications - Optical
Parameter Symbol Min. Typ. Max. Unit Note
Average Output Power POUT -5 0 dBm
Extinction Ratio ER 9 dB
1480 1490 1500 nm BO28C4334640D
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
Jitter P-P tJ 0 0.1 UI 1
Output Eye Mask
Compliant with IEEE802.3 z
(class 1 laser safety)
2
Notes:
1. Measured at 2
7
-1 non-return-to-zero PRBS pattern.
2. Transmitter eye mask definition.
5. Receiver Specifications - Optical
Parameter Symbol Min. Typ. Max. Unit Note
1260 1310 1360 nm BO28C4334640D
Receiver Sensitivity PIN -21 dBM 1
Input Saturation Power (Overload) PSAT -0.5 dBm
LOS Assert PA -35 dBm
LOS De-assert PD -24 dBm
LOS Hysteresis PA-PD 0.5 2 6 dB
Notes:
1. Measured with Light source 1490nm/1310nm, ER=9dB; BER =<10
-12
@PRBS=2
7
-1 non-return-to-zero.
5. BO28C4334640D
BiDi cSFP 1.25G 1490nm/1310nm 40KM
RoHS Compliant Optical Transceiver
- 5 -
6. cSFP to Host Connector Pin Out
Pin Symbol Name / Description Note
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.
6. BO28C4334640D
BiDi cSFP 1.25G 1490nm/1310nm 40KM
RoHS Compliant Optical Transceiver
- 6 -
Pinout of Connector Block on Host Board
7. EEPROM Information
The cSFP MSA defines a 256-byte memory map in EEPROM describing the transceivers capabilities, standard
interfaces, manufacturer, and other information, which is accessible over a 2 wire serial interface at the 8-bit
address 1010000X (A0h).
Data
Address
Field Size
(Bytes)
Name of Field Contents (Hex) Description
0 1 Identifier XX Formfactor
1 1 Ext. Identifier XX
2 1 Connector XX
3-10 8 Transceiver XX XX XX XX XX XX XX XX Transmittter Code
11 1 Encoding XX
12 1 BR, Nominal XX Transceiver Speed
13 1 Reserved 00
14 1 Length (9μm) km XX Max. link length in KM
15 1 Length (9μm) 100m XX Max. link length in M
16 1 Length (50μm) 10m XX Max. link length in M
17 1 Length(62.5μm)10m XX Max. link length in M
18 1 Length (Copper) XX Max. link length in M
29 1 Reserved 00
30-35
16
Vendor name
XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX
Vendor name - OEM
36 1 Reserved 00
37-39 3 Vendor OUI XX XX XX
40-55
16
Vendor PN
XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX
Product Number -
depending on Part
56-59 4 Vendor rev XX XX XX XX Vendor revision
60-61 2 Wavelength XX XX Transceiver
Wavelength
62 1 Reserved 00
63 1
CC BASE
XX Checksum of bytes 0-
62
64-65 2 Options XX XX
7. BO28C4334640D
BiDi cSFP 1.25G 1490nm/1310nm 40KM
RoHS Compliant Optical Transceiver
- 7 -
66 1 BR, max XX
67 1 BR, min XX
68-83 16
Vendor SN
XX XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX
Part serial number
84-91 8 Vendor date code XX XX XX XX XX XX 20 20 Year, Month, Day
92 1 Diagnostic type XX Diagnostics
93 1 Enhanced option XX Diagnostics
94 1 SFF-8472 XX Diagnostics
95 1
CC_EXT
XX Checksum of bytes 64-
94
96-255 160 Vendor Specific
8. Digital Diagnostics / Digital Optical Monitoring
The transceiver provides serial ID memory contents and diagnostic information about the present
operating conditions by the 2-wire serial interface (SCL, SDA).
The diagnostic information with internal calibration or external calibration are all implemented,
including received power monitoring, transmitted power monitoring, bias current monitoring, supply
voltage monitoring and temperature monitoring.
9. Recommended Interface Circuit
Note1: Recommendation 100Ω series resistance on host board.