Description
The SFP-BIDI transceivers are high performance, cost effective
modules supporting dual data-rate of 1.25Gbps/1.0625Gbps and 2KM
transmission distance with MMF.
The transceiver consists of three sections: a FP 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
(MSA) and SFF-8472. For further information, please refer to SFP
MSA.
Features
Dual data-rate of 1.25Gbps/1.063Gbps operation
1310nm FP laser and PIN photodetector for 2KM transmission
Compliant with SFP MSA and SFF-8472 with simplex LC receptacle
Digital Diagnostic Monitoring:
Internal Calibration or External Calibration
Compatible with SONET OC-24-LR-1
Compatible with RoHS
+3.3V single power supply
Operating case temperature range:
0 °C to +70 °C (Commercial)
-40 °C to +85 °C (Industrial)
Applications
Gigabit Ethernet
Fiber Channel
Switch to Switch interface
Switched backplane applications
Router/Server interface
Other optical transmission systems
Absolute Maximum Ratings
| Parameter | Symbol | Min | Max | Unit |
| Supply Voltage | Vcc | -0.5 | 4.7 | V |
| Storage Temperature | Ts | -40 | +85 | °C |
Case Operating Temperature | TOP | 0 | 70°C |
Electrical Characteristics (TOP = 0 to 70℃, VCC = 3.15 to 3.60Volts)
Parameter | Symbol | Min | Typ | Max | Unit | |
Supply Voltage | Vcc | 3.15 | 3.3 | 3.6 | V | |
Supply Current | lcc | | 185 | 280 | mA | |
Transmitter | | | | | | |
Input differential impedance | Rin | | 100 | | Ω | 1 |
Single ended data input swing | Vin,pp | 250 | | 1200 | mV | |
Transmit Disable Voltage | VD | Vcc–1.3 | | Vcc | V |
Transmit Enable Voltage | VEN | Vee | | Vee+ 0.8 | V | 2 |
Transmit Disable Assert Time | | | | 10 | us | |
Receiver | | | | | | |
Single ended data output swing | Vout,pp | 250 | | 800 | mV | 3 |
Data output rise time | tr | | 100 | 175 | ps | 4 |
Data output fall time | tf | | 100 | 175 | ps | 4 |
LOS Fault | VLOS fault | Vcc–0.5 | | VccHOST | V | 5 |
LOS Normal | VLOS norm | Vee | | Vee+0.5 | V | 5 |
Power Supply Rejection | PSR | 100 | | | mVpp | 6 |
Notes:
1. Connected directly to TX data input pins. AC coupled thereafter.
2. Or open circuit.
3. Into 100 ohms differential termination.4. 20 – 80 %
5. Loss Of Signal is LVTTL. Logic 0 indicates normal operation;
logic 1 indicates no signal detected.
6. Receiver sensitivity is compliant with power supply sinusoidal
modulation of 20 Hz to 1.5 MHz up to specified value applied
through the recommended power supply filtering network.
Optical Characteristics
| Transmitter |
| Parameter | Symbol | Min. | Typical | Max. | Unit | Notes |
Operating Wavelength | λC | 1260 | 1310 | 1360 | nm | - |
| Average Launch Power | Po | -9 | - | -4 | dBm | 1 |
Extinction Ratio | ER | 10 | - | - | dB | 1 |
RMS spectral width | Δλ | - | - | 4 | nm | - |
Rise/Fall time (20%~80%) | Tr/Tf | - | - | 0.26 | ps | 2 |
Output Eye Mask | Telcordia GR-253-CORE and ITU-T G.957 compatible | |
| Receiver |
| Operating Wavelength | | 1470 | | 1510 | nm | |
| Receiver sensitivity (OMA) | Psen | - | - | -22 | dBm | 1 |
| Stress sensitivity (OMA) | Pimax | -3 | - | - | dBm | |
| LOS Assert per lane | Pa | -36 | - | - | dBm | |
| LOS De-assert | Pd | - | - | -24 | dBm | 2 |
| LOS Hysteresis | Pd-Pa | 0.5 | - | 6 | dB |
|
Notes:
1. Measure at 2^23-1 NRZ PRBS pattern
2.Transmitter eye mask definition
3.Measured with Light source 1310nm (1550nm), ER=10dB; BER
=<10^-12 @PRBS=2^23-1 NRZ.4.When LOS de-asserted, the RX data+/- output is signal output.
Digital Diagnostic Functions
TAKFLY TK-B3524-3LCD2 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, TAKFLY 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 8bit 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 TK-B3524-3LCD2 are
Internally calibrated by default.
