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FTLX3871MCCXX Datasheet(PDF) 3 Page - Finisar Corporation. |
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FTLX3871MCCXX Datasheet(HTML) 3 Page - Finisar Corporation. |
3 / 14 page FTLX3871MCCxx Product Specification Finisar Corporation – September 2015 Rev. C1 Page 3 I. Pin Descriptions Pin Symbol Name/Description Ref. 1 VEET Transmitter Ground 1 2 TFAULT Transmitter Fault 2 3 TDIS Transmitter Disable. Laser output disabled on high or open. 3 4 SDA 2-wire Serial Interface Data Line 2 5 SCL 2-wire Serial Interface Clock Line 2 6 MOD_ABS Module Absent. Grounded within the module 2 7 RS0 Rate Select 0. 4 8 RX_LOS Loss of Signal indication. Logic 0 indicates normal operation. 5 9 RS1 Rate Select 1. 4 10 VEER Receiver Ground 1 11 VEER Receiver Ground 1 12 RD- Receiver Inverted DATA out. AC Coupled. 13 RD+ Receiver Non-inverted DATA out. AC Coupled. 14 VEER Receiver Ground 1 15 VCCR Receiver Power Supply 6 16 VCCT Transmitter Power Supply 6 17 VEET Transmitter Ground 1 18 TD+ Transmitter Non-Inverted DATA in. AC Coupled. 19 TD- Transmitter Inverted DATA in. AC Coupled. 20 VEET Transmitter Ground 1 Notes: 1. Circuit ground is internally isolated from chassis ground. 2. T FAULT is an open collector/drain output, which should be pulled up with a 4.7k – 10k Ohms resistor on the host board if intended for use. Pull up voltage should be between 2.0V to Vcc + 0.3V. A high output indicates a transmitter fault caused by either the TX bias current or the TX output power exceeding the preset alarm thresholds. A low output indicates normal operation. In the low state, the output is pulled to <0.8V. 3. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V. 4. Internally pulled down per SFF-8431 Rev 4.1. See Sec. X of this datasheet for the logic table to use for the internal CDRs locking modes. 5. LOS is open collector output. Should be pulled up with 4.7k – 10k on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal. 6. Internally connected Figure 1. Diagram of Host Board Connector Block Pin Numbers and Names. VeeT VeeT VeeR VeeR TD- TD+ RD+ RD- VccT VccR VeeT VeeR TX_Fault SDA SCL MOD_ABS RS0 RX_LOS 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 Towards ASIC Towards Bezel TX_Disable RS1 |
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