RoHS Compliant Single Mode SFP Transceiver

RoHS Compliant Single Mode SFP Transceiver for GbE and Fiber Channel FEATURES Compliant with SFP Transceiver SFF-8472 MSA specification with internal calibration Compliant with Specifications for IEEE 802.3z/Gigabit Ethernet Single + 3.3V Power Supply and TTL Logic Interface EEPROM with Serial ID Functionality Laser Class 1 Product which comply with the requirements of IEC 60825-1 and IEC 60825-2 Duplex LC Connector interface Description The LCP-1250 series are hot pluggable 3.3V Small-Form-Factor transceiver modules designed expressly for high-speed communication applications that require rates up to 1.25Gb/s. The transceiver is data rate transparent, which means it can support GbE (1.25Gb/s) as well as 1x Fiber channel (1.062Gb/s) operations The LCP-1250 series are designed to be compliant with SFP Multi-source Agreement (MSA). Digital diagnostic monitoring functions (Temperature, VCC, TX optical power, TX laser bias current, and RX received optical power) compliant with SFF-8472 are also available. See order information for details. The post-amplifier of the LCP-1250 series also includes a Loss of Signal (LOS) circuit that provides a TTL logic-high output when the received optical level is below a preset LOS Assert threshold. Applications www.DataSheet4U.com Gigabit Ethernet Switch to Switch interface Switched backplane applications File server interface Performance LCP-1250B4Mxx: 1310nm DFB laser, 19dB link budget (40km) LCP-1250D4Mxx: 1550nm DFB laser, 17dB link budget (40km) LCP-1250D4Wxx: 1550nm DFB laser, 21dB link budget (70km) LCP-1250D4Rxx: 1550nm DFB laser, 24dB link budget (80km) LCP-1250D4Vxx: 1550nm DFB laser, 30dB link budget (100km) 1 DELTA ELECTRONICS, INC. Aug., 2006 Rev. 6A www.deltaww.com Absolute Maximum Ratings Parameter Storage Temperature Supply Voltage Symbol Ts VCC Min. -40 0 Typ. Max. 85 5 Unit ºC V Note Recommended Operating Conditions Parameter Case Operating Temperature Supply Voltage Note 1: See order information Symbol TC VCC Min. -5 3.135 Typ. Max. 70 3.465 Unit ºC V Note 1 Electrical Characteristics (VCC=3.3V ± 5%) Parameter Symbol Min. Typ. Max. Total Supply Current ICCT 300 Transmitter Transmitter Differential Input Voltage VDT 0.5 2.4 Transmitter Disable Input-High VDISH 2 VCC+0.3 Transmitter Disable Input-Low VDISL 0 0.8 Transmitter Fault Pull up Resistor RTX_FAULT 4.7 10 Transmitter Fault Output-High VTXFH 2 VCC+0.3 Transmitter Fault Output-Low VTXFL 0 0.8 Receiver Receiver Differential Output Voltage VDR 0.35 2 Receiver LOS Load RRXLOS 4.7 10 LOS Output Voltage-High VLOSH 2 VCC+0.3 LOS Output Voltage-Low VLOSL 0 0.8 Output Data Rise/Fall Time tr / t f 220 Notes: 1. Internally AC coupled and terminated to 100Ohm differential load. 2. Pull up to VCC on host Board 3. Internally AC coupled, but requires a 100Ohm differential termination at or internal to Serializer/ Deserializer. 4. These are 20%~80% values Unit mA V V V kΩ V V V kΩ V V psec Note 1 2 2 2 3 2 2 2 4 2 DELTA ELECTRONICS, INC. Aug., 2006 Rev. 6A www.deltaww.com Optical Characteristics (VCC=3.3V ± 5%, Data Rate=1250Mb/sec, PRBS=27-1 NRZ) Parameter Symbol Min. Typ. Max. Transmitter Output Optical Power (Avg.) 1 -4 LCP-1250B4Mxx 1 -4 LCP-1250D4Mxx PO 2 -3 LCP-1250D4Wxx 5 0 LCP-1250D4Rxx 5 0 LCP-1250D4Vxx Optical Extinction Ratio ER 9 Center Wavelength λC 1355 1310 1274 LCP-1250B4 Series 1570 1550 1530 LCP-1250D4 Series Spectral Width σ LCP-1250B4Mxx (-20dB) 1 LCP-1250D4 Series (-20dB) 1 Side-mode Suppression Ratio SMSR LCP-1250B4Mxx 30 LCP-1250D4 Series 30 Optical Rise/ Fall Time tr/tf 260 Relative Intensity Noise RIN -120 Output Eye Compliant with IEEE 802.3z Receiver Sensitivity (Avg.) -23 LCP-1250B4Mxx LCP-1250D4Mxx -21 PIN -24 LCP-1250D4Wxx -24 LCP-1250D4Rxx -30 LCP-1250D4Vxx λ Input Optical Wavelength 1270 1570 LOS-Deasserted (Avg.) -23 LCP-1250B4Mxx -21 LCP-1250D4Mxx PA -24 LCP-1250D4Wxx -24 LCP-1250D4Rxx -30 LCP-1250D4Vxx LOS-Asserted (Avg.) PD -40 LOS-Hysteresis PA-PD 0.5 Overload -1 LCP-1250B4Mxx PO -1 LCP-1250D4 Series -9 LCP-1250D4Vxx Notes: 1. These are unfiltered 20%~80% values 27-1 PRBS and ER=9dB. Unit Note dBm dB nm nm dB psec dB/Hz 1 dBm 2 nm dBm dBm dB dBm 2. The sensitivity is provided at a BER of 1×10-12or better with an input signal consisting of 1250Mb/s, 3 DELTA ELECTRONICS, INC. Aug., 2006 Rev. 6A www.deltaww.com Mask of the eye diagram for the optical transmit signal SFP Transceiver Electrical Pad Layout 4 DELTA ELECTRONICS, INC. Aug., 2006 Rev. 6A www.deltaww.com Pin Function Definitions Pin Num. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Name VeeT TX Fault TX Disable MOD-DEF2 MOD-DEF1 MOD-DEF0 Rate Select LOS VeeR VeeR VeeR RDRD+ VeeR VccR VccT VeeT TD+ TDVeeT Function Transmitter Ground Transmitter Fault Indication Transmitter Disable Module Definition 2 Module Definition 1 Module Definition 0 Not Connect Loss of Signal Receiver Ground Receiver Ground Receiver Ground Inv. Received Data Out Received Data Out Receiver Ground Receiver Power Transmitter Power Transmitter Ground Transmit Data In Inv. Transmit Data In Transmitter Ground Plug Seq. 1 3 3 3 3 3 3 3 1 1 1 3 3 1 2 2 1 3 3 1 Notes Note 1 Note 2 Module disables on high or open Note 3, 2 wire serial ID interface Note 3, 2 wire serial ID interface Note 3, Grounded in Module Function not available Note 4 Note 5 Note 5 Note 5 Note 6 Note 7 Note 5 3.3 ± 5%, Note 7 3.3 ± 5%, Note 7 Note 5 Note 8 Note 8 Note 5 Plug Seq.: Pin engagement sequence during hot plugging. Notes: 1) TX Fault is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor on the host board. Pull up voltage between 2.0V and VccT, R+0.3V. When high, output indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.8V. 2) TX disable is an input that is used to shut down the transmitter optical output. It is pulled up within the module with a 4.7 – 10 K Ω resistor. Its states are: Low (0 – 0.8V): Transmitter on (>0.8, < 2.0V): Undefined High (2.0 – 3.465V): Transmitter Disabled Open: Transmitter Disabled 3) Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7K – 10KΩresistor on the host board. The pull-up voltage shall be VccT or VccR (see Section IV for further details). Mod-Def 0 is grounded by the module to indicate that the module is present Mod-Def 1 is the clock line of two wire serial interface for serial ID Mod-Def 2 is the data line of two wire serial interface for serial ID 4) LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩ resistor. Pull up voltage between 2.0V and VccT, R+0.3V. When high, this output indicates the received optical power is below the worst-case receiver sensitivity (as defined by the standard in use). Low indicates normal operation. In the low state, the output will be pulled to < 0.8V. 5) VeeR and VeeT may be internally connected within the SFP module. 6) RD-/+: These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100Ω (differential) at the user SERDES. The AC coupling is done inside the 5 DELTA ELECTRONICS, INC. Aug., 2006 Rev. 6A www.deltaww.com module and is thus not required on the host board. The voltage swing on these lines will be between 370 and 2000 mV differential (185 – 1000 mV single ended) when properly terminated. 7) VccR and VccT are the receiver and transmitter power supplies. They are defined as 3.3V ±5% at the SFP connector pin. Maximum supply current is 300mA. Recommended host board power supply filtering is shown below. Inductors with DC resistance of less than 1 ohm should be used in order to maintain the required voltage at the SFP input pin with 3.3V supply voltage. When the recommended supply-filtering network is used, hot plugging of the SFP transceiver module will result in an inrush current of no more than 30mA greater than the steady state value. VccR and VccT may be internally connected within the SFP transceiver module. 8) TD-/+: These are the differential transmitter inputs. They are AC-coupled, differential lines with 100Ω differential termination inside the module. The AC coupling is done inside the module and is thus not required on the host board. The inputs will accept differential swings of 500 – 2400 mV (250 – 1200 mV single-ended), though it is recommended that values between 500 and 1200 mV differential (250 – 600 mV single-ended) be used for best EMI performance. Recommend Circuit Schematic VCC 3.3V 1uH 1uH RES1 10uF 0.1uF 0.1uF Protocol Vcc DELTA SFP Module VccT 10k Ohms Tx_Disable Tx_Fault Tx_Disable Tx_Fault TD + 0.01uF 100 Ohms Laser Driver Laser Diode TD - 0.01uF Protocol IC SerDes IC RES1 10uF VeeT VccR 0.1uF RD + 100 Ohms* 0.01uF Preamp & Quantizer Photo Diode RD Rx_LOS 3.3V 0.01uF Rx_LOS VeeR RES1 RES1 RES1 PLD / PAL Mod_def 2 Mod_def 1 Mod_def 0 EEPROM RES1 = 4.7k to 10k Ohms * Depands on SerDes IC used 6 DELTA ELECTRONICS, INC. Aug., 2006 Rev. 6A www.deltaww.com Package Outline Drawing 7 DELTA ELECTRONICS, INC. Aug., 2006 Rev. 6A www.deltaww.com SFP timing parameters for SFP management Parameter TX_DISABLE Assert time TX_DISABLE Negate time Time to initialize, including reset of TX_FAULT TX Fault Assert Time TX_DISABLE to reset LOS Assert Time LOS Deassert Time Serial ID Clock Rate Symbol t_off t_on t_init t_fault t_rest t_loss_on t_loss_off f_serial_clock 10 100 100 100 Min. Max. 10 1 300 100 Unit μsec msec msec μsec μsec μsec μsec kHz Note 1 2 3 4 5 6 7 Notes: 1) Time from rising edge of TX_DISABLE to when the optical output falls below 10% of nominal 2) Time from falling edge of TX_DISABLE to when the modulated optical output rises above 90% of nominal 3) From power on or negation of TX_Fault using TX Disable 4) Time from fault to TX fault on. 5) Time TX Disable must be held high to reset TX_Fault 6) Time