RE:. STC-4 4.Gb/s CWDM Single-mode SFP Transceiver PRODUCT FEATURES Up to 4.Gb/s data links DFB laser transmitter and PIN receiver Up to km on 9/µm SMF Hot-pluggable SFP footprint Duplex LC/UPC type pluggable optical interface Low power dissipation Metal enclosure, for lower EMI RoHS compliant and lead-free Single +3.3 power supply Support Digital Diagnostic Monitoring interface Compliant with SFF-847 Case Operating Temperature: C to +7 C APPLICATIONS Base-LX Ethernet 4xFC at 4.Gbps xfc at. Gbps xfc at.6gbps Copyright 3 Swedish Telecom Page
RE:. PRODUCT DESCRIPTION Swedish Telecoms STC-4 Small Form Factor Pluggable (SFP) transceivers are compatible with the Small Form Factor Pluggable Multi-Sourcing Agreement (MSA). The transceiver consists of five sections: the LD driver, the limiting amplifier, the digital diagnostic monitor, the DFB laser and the PIN.The module data link up to KM in 9/um single mode fiber. 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 IC. 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 IC register access. PRODUCT SELECTION STC-4 Wavelength xx Clasp Color Code Wavelength xx Clasp Color Code 7 nm 7 Gray 4 nm 4 Brown 9 nm 9 Gray 47 nm 47 Gray 3 nm 3 Gray 49 nm 49 Purple 33 nm 33 Purple nm Blue 3 nm 3 Blue 3 nm 3 Green 37 nm 37 Green nm Yellow 39 nm 39 Yellow 7 nm 7 Orange 4 nm 4 Orange 9 nm 9 Red 43 nm 43 Red 6 nm 6 Brown Copyright 3 Swedish Telecom Page
RE:. I. Pin Descriptions Pin EET TFAULT 3 TDIS 4 Name/Description NOTE Transmitter Ground (Common with Receiver Ground) Transmitter Fault. Transmitter Disable. Laser output disabled on high or open. MOD_DEF() Module Definition. Data line for Serial ID. 3 MOD_DEF() Module Definition. Clock line for Serial ID. 3 6 MOD_DEF() Module Definition. Grounded within the module. 3 7 Rate Select No connection required 4 8 LOS Loss of Signal indication. Logic indicates normal operation. 9 EER Receiver Ground (Common with Transmitter Ground) EER Receiver Ground (Common with Transmitter Ground) EER Receiver Ground (Common with Transmitter Ground) RD- Receiver Inverted DATA out. AC Coupled 3 RD+ Receiver Non-inverted DATA out. 4 EER Receiver Ground CCR Receiver Power Supply 6 CCT Transmitter Power Supply 7 EET Transmitter Ground (Common with Receiver Ground) 8 TD+ Transmitter Non-Inverted DATA in. AC Coupled. 9 TD- Transmitter Inverted DATA in. AC Coupled. EET Transmitter Ground (Common with Receiver Ground) AC Coupled (Common with Transmitter Ground) s:. Circuit ground is internally isolated from chassis ground.. Laser output disabled on TDIS >. or open, enabled on TDIS <.8. 3. Should be pulled up with 4.7k - kohms on host board to a voltage between. and 3.6.MOD_DEF () 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 x and x Rates).If implemented, the input will be internally pulled down with > 3kΩ resistor. The input states are: Low (.8): Reduced Bandwidth (>.8, <.): Undefined High (. 3.46): Full Bandwidth Open: Reduced Bandwidth. LOS is open collector output should be pulled up with 4.7k - kohms on host board to a voltage between. and 3.6. Logic indicates normal operation; logic indicates loss of signal. Copyright 3 Swedish Telecom Page 3
RE:. Figure. Pin out of Connector Block on Host Board II. Absolute Maximum Ratings Storage Temperature Ts Storage Ambient Humidity Power Supply oltage -4 8 ºC HA 9 % CC -. 4 -.3 cc+.3 Signal Input oltage Receiver Damage Threshold III. Recommended Operating Conditions Tcase 7 ºC Ambient Humidity HA 7 % Power Supply oltage CC 3.3 3.47 Power Supply Current ICC 3 ma mp-p Case Operating Temperature 3.3 Power Supply Noise Rejection Data Rate 4./4. Gbps Transmission Distance Coupled Fiber Single mode fiber Copyright 3 Swedish Telecom Page 4 Non-condensing Hz to MHz TX Rate/RX Rate KM 9/um SMF
RE:. I. Specification of Transmitter Average Output Power Extinction Ratio POUT ER 6 db λc (XX)-7. XX (XX)+7. nm SMSR 3 Center Wavelength Side Mode Suppression Ratio Transmitter OFF Output Power Differential Line Input Impedance σ nm -4 Ohm 9 FC-PI requirements Output Eye Mask DFB Laser ) db POff RIN Spectrum Bandwidth(-dB) () (3) (): Measure at ^7- NRZ PRBS pattern (): XX is: 7,9,3,33, 3,37,39,4,43,4,47,49,,3,,7,9 and 6 (3): Transmitter eye mask definition. Specification of Receiver Input Optical Wavelength λin 7 Receiver Sensitivity PIN Input Saturation Power (Overload) PSAT 6 nm -8 () Los Of Signal Assert PA Los Of Signal De-assert PD -3 PA-PD. LOS Hysteresis -9 6 () db (): Measured with Light source XX nm, ER=4dB; BER =<^- @PRBS=^7- NRZ (): When LOS de-asserted, the RX data+/- output is High-level (fixed) Copyright 3 Swedish Telecom Page
RE:. I. Electrical Interface Characteristics Transmitter Total Supply Current ICC A ma () Transmitter Disable Input-High DISH cc+.3 Transmitter Disable Input-Low DISL.8 Transmitter Fault Input-High DISL cc+.3 Transmitter Fault Input-Low Receiver Total Supply Current TxFH.8 B ma LOSS Output oltage-high LOSH cc+.3 LOSS Output oltage-low LOSL.8 (): A (TX) + B (RX) = 3mA ICC () LTTL (Not include termination circuit) II. Digital Diagnostic Functions Swedish Telecoms STC-4 transceivers support the -wire serial communication protocol as defined in the SFP MSA. It is very closely related to the EPROM 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, Swedish Telecoms 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 6-byte memory map in EPROM that is accessible over a -wire serial interface at the 8 bit address X (Ah). The digital diagnostic monitoring interface makes use of the 8 bit address X (Ah), 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 -wire serial interface. When the serial protocol is activated, the serial clock signal (SCL, Mod Def ) is generated by the host. The positive edge clocks data into the SFP transceiver into those segments of the EPROM that are not write-protected. The negative edge clocks data from the SFP transceiver. The serial data signal (SDA, Mod Def ) 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 STC-4 are internally calibrated by default. Copyright 3 Swedish Telecom Page 6
RE:. III. Recommend Circuit Schematic 3.3 CC uh Protocol cc cct uh uf RES Swedish Telecoms SFP Module.uF uf.uf Tx_Disable Tx_Disable Tx_Fault Tx_Fault K.uF TD+ Ohm Laser Driver TD- Laser Diode eet.uf ccr SerDes IC RES uf.uf RD+ Protocol IC.uF Amplifier Ohm RD-.uF Photo Diode Rx_LOS Rx_LOS eer 3.3 RES RES RES Mod_def Mod_def EEPROM PLD/PAL Mod_def RES=4.7K tok Ohms * Depands onserdes IC used Copyright 3 Swedish Telecom Page 7
RE:. IX. Mechanical Specifications (: mm) STC-4 Appendix A. Document Revision ersion No. Date Description. --3 Preliminary datasheet Copyright 3 Swedish Telecom Page 8