1.25G SFP Transceiver MXP-243S Applications: 1.25Gb/s 1000Base-LX Ethernet 1.0625Gb/s Fiber Channel Features: Operating bit rate 1.25Gb/s Operating at 1280-1330nm wavelength Single +3.3V power supply Differential LVPECL inputs and outputs TTL signal detect indicator Description MXP-243S SFP transceiver is an excellent product , which is a series of high performance optical modules suitable for the Fiber optic communication and Ethernet accessing for signal that rates up to 1.25Gb/s. The transmitter section of MXP-243S SFP incorporates 1310nm FP laser as the optical source. And the receiver section consists of a PIN photodiode mounted together with a trans-impedance preamplifier (TIA). Because of its hot-pluggable capability , MXP-243S SFP transceiver can be installed in or removed from any MSA compliant pluggable small form factor port regardless of whether the host equipment is operating or not. Furthermore , MXP-243S SFP transceiver features an E/EPROM that Industry standard contains the detailed product’s information stored for retrieval by host small form pluggable equipment. For further information, please refer to SFP Multi-Source (SFP) package Agreement (MSA). Hot-pluggable capability The transceiver operates at up to1.25G data-rate from a single +3.3 V power supply only. And it uses TTL signal as detect indicator. Duplex LC connector Metal enclosure, for Specification: lower EMI Very low jitter Operating Information Low power Part Number Input/Output Signal Detect Voltage Temperature MXP-243S AC/AC TTL +3.3V 0℃ to70℃ dissipation Link length up to 20km in 9/125 SMF 1of7 Transmitter Optical, Electrical Characteristics Parameter Symbol Input differential impedance Rin Differential data input swing Vin PP Min Typ Max Unit 100 100 Transmit Disable Input High Voltage Ω 1200 mV 2.0 V Transmit Disable Input Low Voltage 0.8 Transmit Fault OutputHighVoltage V 2.0 V Transmit Fault Output LowVoltage Transmit Disable Assert Time 0.14 Optical Transmit Power PO -9.5 Extinction Ratio ER 9 Output Spectrum Width(RMS) ∆λ Note 0.8 V 5 µs -3 dBm Average Power dB 4 nm Receiver Optical, Electrical Characteristics Parameter Single ended data output swing Symbol Min Vout PP 200 Receiver Loss of Signal Output Typ 800 mV Voltage -low Sen PinMAX 0.8 V -20 dBm -3 Signal detect Range -30 Signal detect-Hysteresis 0.5 Note V Receiver Loss of Signal Output Maximum Input Power Unit 2 Voltage -high Sensitivity Max BER<1E-10 dBm -21 dBm dB Absolute Maximum Ratings Parameter Symbol Min Max Unit Storage Temperature TS -40 +85 ℃ Operating Temperature TO 0 +70 ℃ Power Supply Voltage VCC -0.5 6.0 V Note 2of7 Pin View： 20 VEET 1 VEET 19 TD- 2 TX Fault 18 TD+ 3 TX Disable 17 VEET 4 MOD_DEF(2) 16 VCCT 5 MOD_DEF(1) 15 VCCR 6 MOD_DEF(0) 14 VEER 7 Rate Select 13 RD+ 8 LOS 12 RD- 9 VEER 11 VEER 10 VEER Top of board Pin Bottom of board Assignment: Pin Name Description 1 VEET Transmitter Ground 2 TXFAULT Transmitter Fault. 3 TXDIS Transmitter Disable. 4 MOD_DEF(2) SDA Serial Data Signal 5 MOD_DEF(1) SCL Serial Clock Signal 6 MOD_DEF(0) Grounded within the module. 7 Rate Select No connection required 8 LOS Loss of Signal indication. Logic 0 indicates normal operation. 9 VEER Receiver Ground 10 VEER Receiver Ground 11 VEER Receiver Ground 12 RD- Receiver Inverted DATA out. 13 RD+ Receiver Non-inverted DATA out. 14 VEER Receiver Ground 15 VCCR Receiver Power Supply 16 VCCT Transmitter Power Supply 17 VEET Transmitter Ground 18 TD+ Transmitter Non-Inverted DATA in. 19 TD- Transmitter Inverted DATA in. 20 VEET Transmitter Ground 3of7 Block Diagram Of Transceiver Transmitter Section section RXdRXd+ MOD_DEF(1) MOD_DEF(0) BIAS a LD driver IC which TXd+ converts differential input TXdTX-DIS LVPECL logic signals into VCC TRANSMITTER 2 The laser OSA is driven by MOD_DEF(2) ID E PROM mates to the fiber cable. CONNECTOR subassembly (OSA) which DATA- VCC laser in an eye safe optical DATA+ PT RXLOS TX-FAULT DATA+ DATA- LD consists of 1310nm FP LIMITING AMP RECEIVER DRIVER transmitter PM LD The an analog laser driving current. TX-FAULT 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. When sensing an improper power level in the laser driver, the SFP sets this signal high and turns off the laser. TX-FAULT can be reset with the TX-DISABLE line. The signal is in TTL level. TX-DISABLE 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 KΩ 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. The TX-DISABLE signal is high (TTL logic “1”) to turn off the laser output. The laser will turn on when TX-DISABLE is low (TTL logic “0”). 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. 4of7 Receiver Section The receiver utilizes an InGaAs PIN photodiode mounted together with a trans-impedance preamplifier IC in an OSA. This OSA is connected to a circuit providing post-amplification quantization, and optical signal detection. RX-LOS LOS (Loss of Signal) is an open collector/drain output, which should be pulled up with a 4.7K – 10KΩresistor. 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. The RX-LOS is high (TTL logic “1”) when there is no incoming light from the companion transceiver. This signal is normally used by the system for the diagnostic purpose. The signal is operated in TTL level. RD-/+ These are the differential receiver outputs. They are AC coupled 100Ω differential lines which should be terminated with 100 Ω(differential) at the user SERDES. The AC coupling is done inside the 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. Recommended Interface Circuit Host Board SFP Module DC+3.3V DC+3.3V 4.7K to 10KΩ 4.7K to 10KΩ TX-DISABLE DC+3.3V TX-FAULT PECL SerDat OUT+ Z0=50Ω TX-DAT SerDat OUT- Z0=50Ω TX-DATQ SerDat IN- Z0=50Ω RX-DATQ SerDat IN+ Z0=50Ω RX-DAT Laser driver 2X150Ω DC+3.3V PECL Amplifier DC+3.3V 4.7K to 10KΩ RX-LOS DC +3.3V 3X4.7K to 10KΩ MOD-DEF(2) MOD-DEF(1) EEPROM MOD-DEF(0) RGND 5of7 Dimensions Dimensions are in millimeters. All dimensions are ±0.1mm unless otherwise specified. (unit:mm). 7 ０ ０ ２ ０ ０ ０ ０ ０ ： Ｎ Ｓ 11 54.5 Ｓ ３ ２ － Ｐ Ｘ Ｍ 3.65 5.5 8 1.9 3.5 8.6 1 6.25 1.5 ｒ ｅ ｖ ｉ ｅ ｃ ｓ ｎ ａ ｒ Ｔ 4 13.5 15.5 6of7 Statement: Genuine-optical company has the ultimate explanation authority to the content of the product material, if there have some modifies, we’re sorry for can’t give a notice. Users should for our company on their one's own uses performance should having prove going on of products, our company is not responsible for performance of user's products . Any standard , agreement that this text quotes are only for referential use, do not do the basis of examining the quality of the products , whether the products are qualified to produce factory's test stone to fix with our company. Version: V2.1 Publishing Date: 2005-04-28 Contact Information: Address: Huagong Tech BDG, Science &Technology Region of Hust, Donghu High-Tech Zone, Wuhan Hubei, P.R.China Post Code: 430223 Tel: +86-27-87180097 Website: http://www.genuine-opto.com 7of7