1.25G SF 1310/1550 & 1550/1310nm D 20km SC

1.25Gbp/s Bi-Di SFP SC Transceiver Module with DDM function Feature: Up to 1.25Gbps data link ■Integrated single fiber bi-directional optical subassembly ■Hot- pluggable SFP footprint ■SC pluggable optical interface ■Low power dissipation ■Metal enclosure, for lower EMI ■RoHs compliant and lead-free ■Single +3.3V power supply ■Support Digital Diagnostic Monitoring interface ■Compliant with SFF-8472 ■Case operating temperature 0℃ to 70℃ or -40℃ to 85℃ Applications: ■Gigabit Ethernet ■Gigabit Fiber Channel ■Switch to switch interface Descriptions: Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA), The transceiver consists of sections: the LD driver, the limiting amplifier, the digital diagnostic monitor. 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. Pin Descriptions: Pin Symbol Name/Description Ref 1 VEET Transmitter Ground (Common with Receiver Ground) 1 2 TFAULT Transmitter Fault. 2 3 TDIS Transmitter Disable. Laser output disabled on high oropen. 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 normaloperation. 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 Notes: 1. Circuit ground is internally isolated from chassis ground. 2. Laser output disabled on T DIS >2.0V or open, enabled on T DIS <0.8V. 3. Should be pulled up with 4.7k - 10kohms on host board to a voltage between 2.0V and3.6V. 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: Low (0 – 0.8V): Reduced Bandwidth (>0.8V, < 2.0V): Undefined High (2.0 – 3.465V): Full Bandwidth 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. 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 Recommended Operating Conditions: Parameter Symbol Min Typ Max Unit note Case Operating Temperature Tease 0/-40 70/85 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 Gbps TX Rate/RX Rate Transmission Distance 0.55 120 KM Coupled Fiber Multi or Single mode fiber Specification of Transmitter: Parameter Symbol Min Typ Max Unit note Average Output Power Pout -9.5 -3 dBm 0.55km 850nm -9 -3 dBm 3km 1310nmFP -9 -3 dBm 3km 1550nmFP -9 -3 dBm 10km 1310nmFP -9 -3 dBm 10km 1550nmDFB -2 +3 dBm 40km 1310nmDFB -5 0 dBm 40km 1490nmDFB -5 0 dBm 40km 1550nmDFB -2 +3 dBm 80km 1490nmDFB -2 +3 dBm 80km 1550nmDFB Extinction Ratio ER 9 dB Center Wavelength λC 1270 1310 1360 nm 1310nm FP 1290 1310 1330 nm 1310nm DFB 1520 1550 1580 nm 1550nm DFB Spectrum Width (RMS) σ 4 nm FP Laser(TX:1310nm) Spectrum Bandwidth(-20dB) σ 1 nm 1550nm DFB 1 nm 1490nm DFB 1 nm 1310nm DFB Transmitter OFF Output Power POff -45 dBm Differential Line Input Impedance Rin 90 100 110 0hm Total Jitter (Peak-Peak) tJ 41 PS Note (1) Output Eye Mask Compliant with IEEE802.3z (class 1 laser safety) Note (1) Note (1): Measure at 2^7-1 NRZ PRBS pattern Note (2): Transmitter eye mask definition Specification of Receiver: Parameter Symbol Min Typ Max Unit note Input Optical Wavelength λIN 1270 1310 1610 nm Receiver Sensitivity PIN -22/-24 dBm 15km～80kmNote (1) -30 120km Note (1) Input Saturation Power (Overload) PSAT -3 dBm Los Of Signal Assert PA -35 dBm PIN Receiver Los Of Signal De-assert PD -25 dBm PIN Note (2) LOS Hysteresis PA-PD 0.5 6 dB Note (1): Measured with Light source 1550nm(1310nm), ER=10dB; BER =<10^-12 @PRBS=2^7-1NRZ Note (2): When LOS de-asserted, the RX data+/- output is High-level (fixed) Electrical Interface Characteristics: Parameter Symbol Min Typ Max Unit note Transmitter 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 VDISH 2 Vcc+0.3 V Transmitter Fault Input-Low VTxFH 0 0.8 V Receiver 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) Digital Diagnostic Functions SFP transceivers support the 2-wire serial communication protocol asdefined in the SFP MSA. It is very closely related to the E2PROM defined in the GBICstandard, with the same electrical specifications. The standard SFP serial ID provides access to identification information that describesthetransceiver’s capabilities, standard interfaces, manufacturer, and otherinformation. Additionally, SFP transceivers provide a unique enhanced digitaldiagnostic monitoring interface, which allows real-time access to device operatingparameters such as transceiver temperature, laser bias current, transmitted opticalpower, received optical power and transceiver supply voltage. It also defines asophisticated system of alarm and warning flags, which alerts end-users when particularoperating 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-wireserial interface at the 8 bit address 1010000X (A0h). The digital diagnostic monitoringinterface makes use of the 8 bit address 1010001X (A2h), so the originally defined serialID memory map remains unchanged. The interface is identical to, and is thus fullybackward compatible with both the GBIC Specification and the SFP Multi Source Agreement.The operating and diagnostics information is monitored and reported by a DigitalDiagnostics Transceiver Controller (DDTC) inside the transceiver, which is accessedthrough a 2-wire serial interface. When the serial protocol is activated, the serialclock signal (SCL, Mod Def 1) is generated by the host. The positive edge clocks datainto the SFP transceiver into those segments of the E2PROM that are notwrite-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 areorganized as a series of 8-bit data words that can be addressed individually orsequentially. Digital diagnostics for the EBSP- XXXX-XX are Externally calibrated by default Recommend Circuit Schematic: Mechanical Specifications (Unit: mm): Regulatory Compliance: Feature Test Method 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 Part Number: Items Name Part Number 1.25 G SF 1310nm 20 km SC 1.25SF1310-20SAT 1.25 G SF 1550nm 20 km SC 1.25SF1550-20SAT 1.25 G SF 1310nm 40 km SC 1.25SF1310-40SAT 1.25 G SF 1550nm 40 km SC 1.25SF1550-40SAT