| Product model | JFTSM-SFP28-25-13-2(LRL)-LCD | Manufacturer brand | JFOPT |
| Package type | SFP28 | Optical connector | Duplex LC |
| Max data rate | 25.78G | Channel data rate | 10.31Gbps |
| Effective transmission distance | 2km | ||
| Wavelength | 1310nm | Operating voltage | 3.3V |
| Fiber type | SMF | Core size | 9/125 |
| Transmitter type | DFB | Receiver type | CDR |
| TX power | -4~2dBm | Receiver sensitivity | ＜8.4dBm |
| Digital optical monitoring(DOM) | YES | Receiver overload | 2dBm |
| Power consumption | <1.2W | Protocols | SFF-8402 |
| Operating temperature(Commercial) | 0℃~+70℃ | Storage temperature(Commercial) | -40℃~+85℃ |
| Operating temperature(Industrial) | -40℃~+85℃ | Storage temperature(Industrial) | -40℃~+85℃ |
JFOPT continues to invest in optical transceiver production, covering a full range of optical transceiver such as 1*9, SFP, 10G, 25G, 100G, 200G, 400G, 800G GPON/EPON/XG/XGSPON OLT transceiver. At the same time, our company provides TOSA, ROSA, BOSA semi-finished device solutions for the downstream peer. JFOPT's production line has a daily production capacity of 10,000 optical transceivers and 20,000 optical devices. In addition, JFOPT's optical transceiver have industry-leading high temperature resistance and anti-interference capability, and are widely used in computing centers, operators, traffic security, power facilities and other industries.
The JFOPT SFP28 25G 1310nm 2km LRL LC DX single-mode transceiver is a high-performance SFP28 module designed for duplex optical data communications. It supports data rates of 24.33Gbps and 25.78Gbps with CDR enabled and can also support 10G Ethernet when CDR is bypassed. Featuring an SFP+ 20-pin connector for hot-plug capability, the module offers digital diagnostic functions accessible via an I2C interface and integrates built-in clock and data recovery (CDR). Optimized for single-mode fiber, it operates at a nominal wavelength of 1310nm. The transmitter uses a 1310nm multiple quantum well DFB laser, compliant with Class 1 laser safety standards under IEC 60825, while the receiver incorporates an InGaAs detector preamplifier (IDP) and a limiting post-amplifier IC for reliable signal processing.
| Operating data rate support 24.33Gbps and 25.78Gbps with CDR engaged mode | Operating data rate support 9.95Gbps and 10.31Gbps with CDR bypassed mode | ||||||||
| 1310nm DFB-LD transmitter | Distance up to 2km(SMF) | ||||||||
| Single 3.3V power supply | Duplex LC connector interface,hot pluggable | ||||||||
| Built-in dual CDR | Power dissipation < 1.2W (Standard) | ||||||||
| Operating case temperature: Standard: 0℃~+70℃ Industrial: -40℃~+85℃ |
| CPRI option 10 | 25GBE | ||||||||
| 10GbE optical link |
| Part No. | Version | Data Rate | Laser | Fiber Type | Distance | Temp. | CDR | DDMI | |
| JFTSM-SFP28-25-13-2(LRL)-LCD | Standard | 24.33Gbps and 25.78Gbps | 1310nm DFB | SMF | 2km | 0℃~+70℃ | Yes | YES | |
| Industrial | -40℃~+85℃ | ||||||||
| Parameter | Symbol | Min. | Max. | Unit | |||||
| Storage temperature | Ts | -40 | +100 | °C | |||||
| Supply voltage | Vcc | -0.5 | 4.0 | V | |||||
| Operating relative humidity | RH | 5 | 95 | % | |||||
*Note:Exceeding any one of these values may destroy the device permanently. |
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| Parameter | Symbol | Min. | Typical | Max. | Units | ||||
| Operating case temperature | TC | Standard | 0 | - | 70 | °C | |||
| Extended | -40 | - | 85 | ||||||
| Power supply voltage | Vcc | 3.135 | - | 3.465 | V | ||||
| Power supply current | Icc | Standard | - | - | 360 | mA | |||
| Extended | - | - | 455 | mA | |||||
| Parameter | Symbol | Min. | Typ. | Max | Unit | Notes | |||
Transmitter |
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| CML inputs(Differential) | Vin | 200 | - | 900 | mVpp | AC coupled inputs | |||
| Input impedance (Differential) | Zin | - | 100 | - | ohms | Connected directly to TX pins | |||
| Tx_DISABLE input voltage - high | - | 2 | - | Vcc+0.3 | V | - | |||
| Tx_DISABLE input voltage - low | - | -0.3 | - | 0.8 | V | - | |||
Receiver |
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| CML Outputs (Differential) | Vout | 300 | - | 1000 | mVpp | AC coupled outputs | |||
| Rx_LOS output voltage - high | - | 2 | - | Vcc+0.3 | V | - | |||
| Rx_LOS output voltage - low | - | -0.3 | - | 0.8 | V | - | |||
| Parameter | Symbol | Min. | Typical | Max. | Unit | ||||
| 9µm core diameter SMF | - | - | - | 2 | Km | ||||
Transmitter |
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| Centre wavelength | λC | 1295 | 1310 | 1325 | nm | ||||
| Spectral width (-20dB) | Δλ | - | - | 1 | nm | ||||
| Average output power@25.78Gb/s | Pout | -4 | - | 2 | dBm | ||||
| Extinction ratio | ER | 3 | - | - | Db | ||||
| Transmitter dispersion penalty | TDP | - | - | 2.7 | Db | ||||
Receiver |
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| Centre wavelength | λC | 1260 | 1310 | 1355 | nm | ||||
| Receiver sensitivity(OMA) | Pmin | - | - | -8.4 | dBm | ||||
| Receiver overload | Pmax | 2 | - | - | dBm | ||||
| Optical return loss | ORL | - | - | -26 | Db | ||||
| LOS de-assert | LOSD | - | - | -15 | dBm | ||||
| LOS assert | LOSA | -25 | - | - | dBm | ||||
| LOS hysteresis | - | 0.5 | - | - | Db | ||||
| Pin Num. | Name | Function | Plug Seq. | Notes | |||||
| 1 | VeeT | Transmitter ground | 1 | Note 5 | |||||
| 2 | TX fault | Transmitter fault indication | 3 | Note 1 | |||||
| 3 | TX disable | Transmitter disable | 3 | Note 2, module disables on high or open | |||||
| 4 | SDA | Module definition 2 | 3 | Data line for serial ID. | |||||
| 5 | SCL | Module definition 1 | 3 | Clock line for serial ID. | |||||
| 6 | MOD_ABS | Module definition 0 | 3 | Note 3 | |||||
| 7 | RS0 | RX rate select(LVTTL). | 3 | Rate select 0, optionally controls SFP28 module receiver. This pin is pulled low to VeeT with a>30K resistor. | |||||
| 8 | RX LOS | Loss of signal | 3 | Note 4 | |||||
| 9 | RS1 | TX rate select(LVTTL). | 1 | Rate select 1, optionally controls SFP28 module transmitter. This pin is pulled low to VeeT with a >30K resistor. | |||||
| 10 | VeeR | Receiver ground | 1 | Note 5 | |||||
| 11 | VeeR | Receiver ground | 1 | Note 5 | |||||
| 12 | RD- | Inv. received data out | 3 | Note 6 | |||||
| 13 | RD+ | Received data out | 3 | Note 6 | |||||
| 14 | VeeR | Receiver ground | 1 | Note 5 | |||||
| 15 | VccR | Receiver power | 2 | 3.3V ± 5%, Note 7 | |||||
| 16 | VccT | Transmitter power | 2 | 3.3V ± 5%, Note 7 | |||||
| 17 | VeeT | Transmitter ground | 1 | Note 5 | |||||
| 18 | TD+ | Transmit data in | 3 | Note 8 | |||||
| 19 | TD- | Inv. transmit data in | 3 | Note 8 | |||||
| 20 | VeeT | Transmitter ground | 1 | Note 5 | |||||
Notes:
1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor on the host board. Pull up voltage between 2.0V and VccT/R+0.3V. When high, 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 is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7K – 10 KΩ resistor. Its states are:
Low (0 – 0.8V): Transmitter on
(>0.8, < 2.0V): Undefined
High(2.0 – 3.465V): Transmitter Disabled
Open: Transmitter Disabled
3) Module Absent, connected to VeeT or VeeR in the module.
4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor. Pull up voltage between 2.0V and VccT/R+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.
5) The module signal ground contacts, VeeR and VeeT, should be isolated from the module case.
6) 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 is thus not required on the host board. The voltage swing on these lines will be between 350 and 700 mV differential (175 –350 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 430mA. 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 100Ω 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 150 – 1200 mV (75 – 600mV single-ended).
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