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Durable Fiber Optical Transceiver SFP BIDI DDM 1.25G 1490/1550nm 80KM Distance

Durable Fiber Optical Transceiver SFP BIDI DDM 1.25G 1490/1550nm 80KM Distance

Durable Fiber Optical Transceiver SFP BIDI DDM 1.25G 1490/1550nm 80KM Distance

Product Details:

Place of Origin: Shenzhen, China
Brand Name: Transcom
Certification: ISO FCC CE RoSH
Model Number: TS-SF-BL45(54)12-80D

Payment & Shipping Terms:

Minimum Order Quantity: 1 PCS
Packaging Details: Standard Package
Delivery Time: 3-5 days
Payment Terms: T/T
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Detailed Product Description
Brand Name: Transcom Rate: 1.25Gb/s
Connector: LC Distance: 80KM


l Up to 1.25Gb/s data links

l DFB laser transmitter

l PIN photo-detector

l Up to 80km on 9/125µm SMF

l Hot-pluggable SFP footprint

l BIDI LC/UPC type pluggable optical interface

l Low power dissipation

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

Commercial: 0°C to +70°C

Extended: -10°C to +80°C

Industrial: -40°C to +85°C


l Switch to Switch Interface

l Gigabit Ethernet

l Switched Backplane Applications

l Router/Server Interface

l Other Optical Links



TRANSCOM’s TS-SF-BL45(54)12-80D Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA), The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the DFB laser and the PIN photo-detector. The module data link up to 80KM 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.


Ordering information

Product part Number

Data Rate







Temperature Range(Tcase)()
TS-SF-BL45(54)12-80D 1.25 Single mode fiber 1490/1550(1550/1490) 80 0~70 commercial
TS-SF-BL45(54)12-80DE 1.25 Single mode fiber 1490/1550(1550/1490) 80 -10~80 extended
TS-SF-BL45(54)12-80DA 1.25 Single mode fiber 1490/1550(1550/1490) 80 -40~85 industrial

.Pin Descriptions

Pin Symbol Name/Description Ref.
1 VEET Transmitter Ground (Common with Receiver Ground) 1
2 TFAULT Transmitter Fault.  
3 TDIS Transmitter Disable. Laser output disabled on high or open. 2
4 MOD_DEF(2) Module Definition 2. Data line for Serial ID. 3
5 MOD_DEF(1) Module Definition 1. Clock line for Serial ID. 3
6 MOD_DEF(0) Module Definition 0. Grounded within the module. 3
7 Rate Select No connection required 4
8 LOS Loss of Signal indication. Logic 0 indicates normal operation. 5
9 VEER Receiver Ground (Common with Transmitter Ground) 1
10 VEER Receiver Ground (Common with Transmitter Ground) 1
11 VEER Receiver Ground (Common with Transmitter Ground) 1
12 RD- Receiver Inverted DATA out. AC Coupled  
13 RD+ Receiver Non-inverted DATA out. AC Coupled  
14 VEER Receiver Ground (Common with Transmitter Ground) 1
15 VCCR Receiver Power Supply  
16 VCCT Transmitter Power Supply  
17 VEET Transmitter Ground (Common with Receiver Ground) 1
18 TD+ Transmitter Non-Inverted DATA in. AC Coupled.  
19 TD- Transmitter Inverted DATA in. AC Coupled.  
20 VEET Transmitter Ground (Common with Receiver Ground) 1



1. Circuit ground is internally isolated from chassis ground.

2. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.

3. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V.MOD_DEF(0) pulls line low to indicate module is plugged in.

4. This is an optional input used to control the receiver bandwidth for compatibility with multiple data rates (most likely Fiber Channel 1x and 2x Rates). If implemented, the input will be internally pulled down with > 30kΩ resistor. The input states are:

Ÿ Low (0 – 0.8V): Reduced Bandwidth

Ÿ (>0.8V, < 2.0V): Undefined

Ÿ High (2.0 – 3.465V): Full Bandwidth

Ÿ Open: Reduced Bandwidth

5. LOS is open collector output. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.


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  
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  






III. Recommended Operating Conditions

Parameter Symbol Min. Typ. Max. Unit Note
Case Operating Temperature Tcase 0   70 ºC TS-SF-BL45(54)12-80D
-10   80 TS-SF-BL45(54)12-80DE
-40   85 TS-SF-BL45(54)12-80DA
Ambient Humidity HA 5   70 % Non-condensing
Power Supply Voltage VCC 3.13 3.3 3.47 V  
Power Supply Current ICC     280 mA  
Power Supply Noise Rejection       100 mVp-p 100Hz to 1MHz
Data Rate     1.25/1.25   Gbps TX Rate/RX Rate
Transmission Distance       80 KM  
Coupled Fiber Single mode fiber 9/125um SMF


.Specification of Transmitter

Parameter Symbol Min. Typ. Max. Unit Note
Average Output Power POUT 0   5 dBm  
Extinction Ratio ER 9     dB  
Center Wavelength λC 1470 1490 1510 nm TS-SF-BL4512-80D
1530 1550 1570 TS-SF-BL5412-80D
Side Mode Suppression Ratio SMSR 30     dB DFB Laser
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     128 ps Note (1)
Output Eye Mask Compliant with IEEE802.3 z (class 1 laser safety)   Note (2)


Note (1): Measure at 2^7-1 NRZ PRBS pattern

Note (2): Transmitter eye mask definition



V. Specification of Receiver

Parameter Symbol Min. Typ. Max. Unit Note
Input Optical Wavelength λIN 1530 1550 1570 nm TS-SF-BL4512-80D
1470 1490 1510 TS-SF-BL5412-80D
Receiver Sensitivity PIN     -26 dBm Note (1)
Input Saturation Power (Overload) PSAT -3     dBm  
Los Of Signal Assert PA -38     dBm  
Los Of Signal De-assert PD     -26 dBm Note (2)
LOS Hysteresis PA-PD 0.5 2 6 dB  


Note (1): Measured with Light source 1550nm(1490nm), ER=9dB; BER =<10^-12 @PRBS=2^7-1 NRZ

Note (2): When LOS de-asserted, the RX data+/- output is High-level (fixed)


VI. Electrical Interface Characteristics

Parameter Symbol Min. Typ. Max. Unit Note
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 VDISL 2   Vcc+0.3 V  
Transmitter Fault Input-Low VTxFH 0   0.8 V  
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) = 280mA (Not include termination circuit)


VII. Digital Diagnostic Functions

TRANSCOM’S TS-SF-BL45(54)12-80D transceivers support the 2-wire serial communication protocol as defined in the SFP MSA. It is very closely related to the E2PROM defined in the GBIC standard, with the same electrical specifications.


The standard SFP serial ID provides access to identification information that describes the transceiver’s capabilities, standard interfaces, manufacturer, and other information.


Additionally, TRANSCOM SFP 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 SFP 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). The digital diagnostic monitoring interface makes use of the 8 bit address 1010001X (A2h), so the originally defined serial ID memory map remains unchanged. The interface is identical to, and is thus fully backward compatible with both the GBIC Specification and the SFP Multi Source Agreement.


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 TS-SF-BL45(54)12-80D are Internally calibrated by default.





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
Laser Eye Safety FDA 21CFR 1040.10, 1040.11 IEC/EN 60825-1,2 Class 1 laser product
Component Recognition IEC/EN 60950 ,UL Compatible with standards
ROHS 2002/95/EC Compatible with standards
EMC EN61000-3 Compatible with standards


Appendix A. Document Revision

Version No. Date Description
1.0 2010-09-01 Preliminary datasheet
2.0 2011-09-10 Update format and company’s logo

Contact Details
Shenzhen Transcom Technology Limited

Contact Person: Iris

Tel: +8618924996170

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