25G SFP28 SR Dual LC Transceivers
FTCS-8525G-02Dxx
PRODUCT FEATURES
- 25Gbps serial optical interface
- 850nm VCSEL transmitter and GaAs PIN PD receiver
- Rate Adaptation
- Operating temperature：
Commercial (0°C~70°C)
Industrial (-40°C~85°C)
- Maximum link length of 70m via OM3 multimode Fiber (MMF)
- Maximum link length of 100m via OM4 multimode Fiber (MMF)
Application
- Inter Rack Connection
- High-speed Servers
- High-performance Computing Clusters
- SAN, Routers, Hubs, Load Balancer
DESCRIPTION
The FTCS-8525G-02Dxx Transceiver is intended for 100m reach service 25.78Gb/s 850nm Multi-mode high-speed communications equipment where low-cost, extraordinary performance and reliability are essential. It consumes low power, operates base on 3.3V DC power supply and is offered in the commercial/industrial temperature range. They are compliant with SFP28 MSA, SFF-8431 and SFF-8432.
The low jitter and low bit error rate optical assembly features a DML laser transmitter and PIN/TIA receiver. It utilizes internal clock and data recovery (CDR) units on transmitter and the receiver chains for low jitter compliance. The differential AC coupled Tx and Rx data interfaces are CML compatible. The device is Class I laser safety compliant.
ABSOLUTE MAXIMUM RATINGS
|
Parameter |
Symbol |
Conditions |
Min. |
Max. |
Unit |
|
Storage Temperature |
TStorage |
-40 |
+85 |
°C |
|
|
Relative Humidity |
RH |
0 |
+85 |
% |
ECOMMENDED OPERATING CONDITIONS
|
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Unit |
|
Case Temperature |
TC |
FTCS-8525G-02D |
0 |
70 |
°C |
|
|
FTCS-8525G-02DI |
-40 |
85 |
||||
|
Power Supply Voltage |
VCC |
3.15 |
3.30 |
3.45 |
V |
|
|
Bit Rate |
BR |
25.78125 |
Gbps |
ELECTRICAL CHARACTERISTICS
|
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Unit |
|
Power Consumption |
1 |
W |
||||
|
Supply Current |
Icc |
300 |
mA |
TRANSMITTER CHARACTERISTICS
|
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Unit |
|
Center wavelength |
λ |
840 |
860 |
nm |
||
|
RMS spectral width |
Pm |
0.6 |
nm |
|||
|
Average optical power |
Pavg |
-5 |
2.4 |
dBm |
||
|
Optical modulation amplitude |
OMA |
-5 |
3 |
dBm |
||
|
Average launch power of OFF transmitter |
Poff |
-30 |
dBm |
|||
|
Extinction ratio |
ER |
3 |
dB |
|||
|
Optical return loss tolerance |
12 |
dB |
RECEIVER CHARACTERISTICS
|
Parameter |
Symbol |
Conditions |
Min. |
Typ. |
Max. |
Unit |
|
Center wavelength |
λ |
840 |
850 |
860 |
nm |
|
|
Damage threshold |
3.4 |
dBm |
||||
|
Receive power overload |
2.4 |
dBm |
||||
|
Receiver reflectance |
-12 |
dB |
||||
|
Receiver sensitivity |
SENS |
Note1 |
-10.3 |
dBm |
||
|
LOS Assert |
LOSA |
-30 |
dBm |
|||
|
LOS De-Assert |
LOSD |
-13 |
dBm |
|||
|
LOS Hysteresis |
LOSH |
0.5 |
dB |
Note1. Measured with a 25.78125G, PRBS-31 NRZ, ER>3.5dB, BER<5E-5.
PIN ASSIGNMENT
PIN DESCRIPTION
Recommended Interface Circuit
Figure 2. Typical application circuit
Mechanical Dimensions
Figure 3. Module Mechanical Dimensions
Digital Diagnostics Functions
As defined by the SFF-8472, Our SFP28 transceivers provide digital diagnostic functions via a 2-wire serial interface, which allows real-time access to the following operating parameters:
- Transceiver temperature
- Laser bias current
- Transmitted optical power
- Received optical power
- Transceiver supply voltage
It also provides a sophisticated system of alarm and warning flags, which may be used to alert end-users when particular operating parameters are outside of a factory-set normal range. The operating and diagnostics information is monitored and reported by a Digital Diagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessed through the 2-wire serial interface. The memories are organized as a series of 8-bit data words that can be addressed individually or sequentially. The 2-wire serial interface provides sequential or random access to the 8 bit parameters, addressed from 0x00h to the maximum address of the memory. For more detailed information, including memory map definitions, please refer the SFF-8472 documentation.
Digital Diagnostic Monitor Accuracy
The following characteristics are defined over recommended operating conditions
|
Parameter |
Accuracy |
Unit |
|
Internally measured transceiver temperature |
+/-3 |
deg.C |
|
Internally measured transceiver supply voltage |
+/-3 |
% |
|
Measured Tx bias current |
+/-10 |
% |
|
Measured Tx output power |
+/-3 |
dB |
|
Measured Rx received average optical power |
+/-3 |
dB |
Ordering information
|
Part Number |
Product Description |
|
FTCS-8525G-02D |
SFP28 SR Transceivers, 850nm, 25G, 100m, with DDM, C-TEMP |
|
FTCS-8525G-02DI |
SFP28 SR Transceivers, 850nm, 25G, 100m, with DDM, I-TEMP |
Important Notice
Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice.
The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.
本产品为光模块产品线，详细信息，请联系我们的销售人员，谢谢！
Important Notice: Performance figures, data and any illustrative material provided in this data sheet are typical and must be specifically confirmed in writing by F-tone Networks before they become applicable to any particular order or contract. In accordance with the F-tone Networks policy of continuous improvement specifications may change without notice. The publication of information in this data sheet does not imply freedom from patent or other protective rights of F-tone Networks or others. Further details are available from any F-tone Networks sales representative.
