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MF-27WXE-M11ZA580 Datasheet(PDF) 7 Page - Mitsubishi Electric Semiconductor |
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MF-27WXE-M11ZA580 Datasheet(HTML) 7 Page - Mitsubishi Electric Semiconductor |
7 / 14 page UQ9-06-010 Ed:1.4 Date:02.Nov.2006 Page 7 of 14 MITSUBISHI (OPTICAL DEVICES) MF-27WXE Series 100Mbps-2.7Gbps, Multi-Rate DWDM SFP TRANSCEIVER MODULE 9. Pin Descriptions Pin No. Function I/O Pin description 1,17,20 TX GND I These pins are the Transmitter ground connections. They should be connected to a low impedance ground plane (0V). 9,10, 11,14 RX GND I These pins are the Receiver ground connections. They should be connected to a low impedance ground plane (0V). 16 TX Vcc * I This is the power supply pin for the Transceiver part. It should be connected to +3.3V. Recommended power supply decoupling. (See Figure 8) 15 RX Vcc * I This is the power supply pin for the Receiver part. It should be connected to +3.3V. Recommended power supply decoupling. (See Figure 8) * Both TX Vcc and RX Vcc have been internally connected due to supply of control circuit Vcc. 18,19 TD+ / TD- I This data input pin modulates the laser diode. When the TD+ input is asserted, the laser diode is turned on. They are internally AC-coupled into an equivalent load of RI differential, as shown in Figure 8. 3 TX_DISABLE I Active high TTL input, with internal 7.4k ohm pull-up resistor to Vcc. Asserting the transmitter disable will deactivate the laser within the assert time. Table 1 indicates the timing of TX_DISABLE. 12,13 RD+ / RD- O Received Data Out and Inverted Received Data Out are differential serial output from the receiver. These are AC-coupled 100 ohm differential lines which should be terminated with a 100 ohm (differential) at the user SERDES, as shown in Figure 8. AC coupling is done inside the module and is thus not required on the host board. 8 RX_LOS O Active high open collector/drain output that indicates a loss-of-signal condition (LOS). When the average optical power received by the module is below the Assert Level, RX_LOS is indicated. Table 1 indicates the timing of RX_LOS. RX_LOS requires a 4.7k to 10k ohm pull-up resistor external to the module, i.e., in the host system Host_Vcc, as shown in Figure 8. The pull-up voltage is between 2.0 V and VccR (VccT) + 0.3 V. 2 TX_FAULT O Active high open collector/drain output that indicates a fault in the module. This can be failure of the laser diode. Under this condition, TX_FAULT will activate and be latched. And then the laser will be deactivated within the assert time. TX_FAULT also requires a 4.7k to 10k ohm pull-up resistor externally, i.e. in the host system Host_Vcc, as shown in Figure 8. The pull-up voltage is between 2.0 V and VccT (VccR) +0.3V. Toggling TX_DISABLE high for at least t_reset can reset it. See Figure 8 and Figure 5. 6,5,4 MOD_DEF [0:2] - This module has a serial ID function, which provides information about the transceiver’s capabilities, standard interfaces, manufacturer and other information. This function is provided via a two wire serial EEPROM interface. MOD_DEF[0] is connected to ground inside the module.(LOW) MOD_DEF[1] is the serial clock signal input.(SCL) MOD_DEF[2] is the data output/input.(SDA) They should be pulled up with 4.7Kohm -10Kohm resistor on the host board. The pull-up voltage shall be VccT or VccR. The serial ID definitions are as given in the “SFP-MSA” standard. 7 NUC - These pins are No User Connection and should be left open. |
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