25G DWDM 10KM CH58 1531.12nm SFP Transceiver
Product Features
- Supports up to 25.78Gbps bit rates
- Hot-pluggable SFP28footprint
- CWDM DFB laser and PIN photodiode, Up to 10km for SMF transmission
- Compliant with SFP+ MSA and SFF-8472 with duplex LC receptacle
- Compatible with RoHS
- Single +3.3V power supply
- Real Time Digital Diagnostic Monitoring
- Operating case temperature:
Standard: 0 to +70°C
Industrial: -40 to +85°C
Applications
- 25GBASE-LR
Description
The SFP28 transceivers are high performance, cost effective modules supporting data rate of 25.78Gbps and 10km transmission distance with SMF.
The transceiver consists of three sections: a DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.
The transceivers are compatible with SFP Multi-Source Agreement and SFF-8472 digital diagnostics functions.
Absolute Maximum Ratings
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
|
Storage Temperature |
TS |
-40 |
|
+85 |
°C |
|
Case Operating Temperature |
TA |
0 |
|
+70 |
°C |
|
Maximum Supply Voltage |
Vcc |
0 |
|
3.6 |
V |
|
Relative Humidity(Non-condensing) |
RH |
0 |
|
85 |
% |
Electrical Characteristics (TOP =0 to 70 °C, VCC = 3.15 to 3.46 Volts)
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
Note |
|
Supply Voltage |
Vcc |
3.15 |
|
3.46 |
V |
|
|
Supply Current |
Icc |
|
|
600 |
mA |
|
|
Power Consumption |
P |
|
|
2 |
W |
|
|
Data Rate |
R |
- |
25.8 |
|
Gb/s |
|
|
Fiber Length |
L |
|
|
10 |
KM |
|
|
Transmitter Section: |
||||||
|
Input differential impedance |
Rin |
|
100 |
|
Ω |
1 |
|
Differential input voltage swing |
Vin,pp |
180 |
|
450 |
mV |
2 |
|
Transmit Disable Voltage |
VD |
2 |
|
Vcc |
V |
3 |
|
Transmit Enable Voltage |
VEN |
Vee |
|
Vee+0.8 |
V |
|
|
Receiver Section: |
||||||
|
Single Ended Output Voltage Tolerance |
V |
-0.3 |
|
4 |
V |
|
|
Rx Output Diff Voltage |
Vo |
180 |
|
450 |
mV |
|
|
LOS Fault |
VLOS fault |
2 |
|
VccHOST |
V |
4 |
|
LOS Normal |
VLOS norm |
Vee |
|
Vee+0.8 |
V |
4 |
Note:
- Connected directly to TX data input pins. AC coupling from pins into laser driver IC.
- Per SFF-8431 Rev 3.0
- Into 100 ohms differential termination.
- LOS is an open collector output. Should be pulled up with 4.7k – 10kΩ on the host board. Normal operation is logic 0; loss of signal is logic 1. Maximum pull-up voltage is 5.5V.
Optical Characteristics (TOP =0 to 70 °C,VCC = 3.15 to 3.46 Volts)
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
Note |
|
Transmitter Section: |
||||||
|
Center Wavelength |
λt |
λ -6.5 |
λ |
λ +6.5 |
nm |
|
|
spectral width (-20dB) |
△λ |
|
|
1 |
nm |
|
|
Average Optical Power |
Pavg |
-4.0 |
|
+2.0 |
dBm |
1 |
|
Laser Off Power |
Poff |
|
|
-30 |
dBm |
|
|
Side Mode Suppression Ratio |
|
30 |
|
|
|
|
|
Extinction Ratio |
ER |
5 |
|
|
dB |
|
|
Optical Return Loss Tolerance |
|
|
|
-12 |
dB |
|
|
Receiver Section: |
||||||
|
Center Wavelength |
λr |
1260 |
|
1610 |
nm |
|
|
Receiver Sensitivity |
Sen |
|
|
-12 |
dBm |
2 |
|
Los Assert |
LOSA |
-30 |
|
|
dBm |
|
|
Los Dessert |
LOSD |
|
|
-16 |
dBm |
|
|
Los Hysteresis |
LOSH |
0.5 |
|
|
dB |
|
|
Overload |
|
2 |
|
|
dBm |
|
Note:
- Average power figures are informative only, per IEEE802.3cc.
- OMA receiver sensitivity is informative. Shall be measured with conformance test signal for . BER =5E-5 .
Timing Characteristics
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
|
TX_Disable Assert Time |
t_off |
|
|
100 |
us |
|
TX_Disable Negate Time |
t_on |
|
|
2 |
ms |
|
Time to Initialize 2-wire interface |
t_2w_start_up |
|
|
300 |
ms |
|
Time to Initialize |
t_start_up |
|
|
300 |
ms |
|
Time to Initialize cooled module and time to power up a cooled module to Power level II |
t_start_up_cooled |
|
|
90 |
s |
|
Time to Power Up to Level II |
t_power_level2 |
|
|
300 |
ms |
|
Time to Power Down from Level II |
t_power_down |
|
|
300 |
ms |
|
Tx_Fault assert |
Tx_Fault_on |
|
|
1 |
ms |
|
Tx_Fault assert for cooled module |
Tx_Fault_on_cooled |
|
|
50 |
ms |
|
TX_FAULT Reset |
t_reset |
10 |
|
|
us |
|
Rx_LOS assert delay |
t_los_on |
|
|
100 |
us |
|
Rx_LOS negate delay |
t_los_off |
|
|
100 |
us |
Digital Diagnostic Specifications
|
Parameter |
Symbol |
Units |
Min |
Max |
Accuracy |
|
Transceiver Temperature |
DDDTemp |
ºC |
0 |
+70 |
±5ºC |
|
Transceiver Supply Voltage |
DDDVoltage |
V |
3.15 |
3.45 |
±3% |
|
Transmitter Bias Current |
DDDBias |
mA |
0 |
35 |
±10% |
|
Transmitter Output Power |
DDDTx-Power |
dBm |
-5 |
+5 |
±3dB |
|
Receiver Average Optical Input Power |
DDDRx-Power |
dBm |
-16 |
-3 |
±3dB |
Ordering information
|
Part Number |
Product Description |
|
BT-SFP28-LR4Cxxxx |
1470~1570nm, 25.78Gbps, LC, 10km, 0°C~+70°C, with DDM |
|
BT-SFP28-LR4ICxxxx |
1470~1570nm, 25.78Gbps, LC, 10km, -40°C~+85°C, with DDM |