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AFCT-57J5ATPZ Datasheet(PDF) 7 Page - AVAGO TECHNOLOGIES LIMITED |
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AFCT-57J5ATPZ Datasheet(HTML) 7 Page - AVAGO TECHNOLOGIES LIMITED |
7 / 18 page 7 Notes: 1. TX_FAULT is an open collector/drain output, which must be pulled up with a 4.7 k – 10 kΩ resistor on the host board. When high, this output indicates a laser fault of some kind. Low indicates normal operation. In the low state, the output will be pulled to < 0.8 V. 2. TX_DISABLE is an input that is used to shut down the transmitter optical output. It is internally pulled up (within the transceiver) with a 6.8 kΩ resistor. Low (0 – 0.8 V): Transmitter on Between (0.8 V and 2.0 V): Undefined High (2.0 – Vcc max) or OPEN: Transmitter Disabled 3. The signals Mod-Def 0, 1, 2 designate the two wire serial interface pins. They must be pulled up with a 4.7 k – 10 kΩ resistor on the host board. Mod-Def 0 is grounded by the module to indicate the module is present Mod-Def 1 is serial clock line (SCL) of two wire serial interface Mod-Def 2 is serial data line (SDA) of two wire serial interface 4. RX_LOS (Rx Loss of Signal) is an open collector/drain output that must be pulled up with a 4.7 k – 10 kΩ resistor on the host board. 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 < 0.8 V. 5. RD-/+ designate the differential receiver outputs. They are AC coupled 100 Ω differential lines which should be terminated with 100 Ω differ- ential at the host SERDES input. AC coupling is done inside the transceiver and is not required on the host board. The voltage swing on these lines will be between 600 and 1600 mV differential (300 – 800 mV single ended) when properly terminated. 6. VccR and VccT are the receiver and transmitter power supplies. They are defined at the SFP connector pin. The maximum supply current is 300 mA and the associated in-rush current will typically be no more than 30 mA above steady state after 2 microseconds. 7. TD-/+ designate the differential transmitter inputs. They are AC coupled differential lines with 100 Ω differential termination inside the module. The AC coupling is done inside the module and is not required on the host board. The inputs will accept differential swings of 400 – 2400 mV (200 – 1200 mV single ended), although it is recommended that values between 500 mV and 1200 mV differential (250-600 mV single ended) be used for best EMI. Table 2. Pin Description Pin Name Function/Description Notes 1 VeeT Transmitter Ground 2 TX_FAULT Transmitter Fault Indication – High indicates a fault condition Note 1 3 TX_DISABLE Transmitter Disable – Module optical output disables on high or open Note 2 4 MOD-DEF2 Module Definition 2 – Two wire serial ID interface data line (SDA) Note 3 5 MOD-DEF1 Module Definition 1 – Two wire serial ID interface clock line (SCL) Note 3 6 MOD-DEF0 Module Definition 0 – Grounded in module (module present indicator) Note 3 7 N.C. 8 RX_LOS Loss of Signal – High indicates loss of received optical signal Note 4 9 VeeR Receiver Ground 10 VeeR Receiver Ground 11 VeeR Receiver Ground 12 RD- Inverse Received Data Out Note 5 13 RD+ Received Data Out Note 5 14 VeeR Receiver Ground 15 VccR Receiver Power + 3.3 V Note 6 16 VccT Transmitter Power + 3.3 V Note 6 17 VeeT Transmitter Ground 18 TD+ Transmitter Data In Note 7 19 TD- Inverse Transmitter Data In Note 7 20 VeeT Transmitter Ground |
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