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74741 Datasheet(PDF) 3 Page - Molex Electronics Ltd. |
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74741 Datasheet(HTML) 3 Page - Molex Electronics Ltd. |
3 / 4 page ACTIVE PERFORMANCE SPECIFICATIONS 1000Base-T RJ-45 Gigabit Ethernet SFP Copper Transceiver 74741 Module Specifications - Recommended Operating Conditions PARAMETERS SYMBOL MIN TYP MAX UNITS NOTES Storage Temperature Tstg -40 85 °C Ambient Operating Temperature Ta 0 70 °C Supply Voltage VDDR, VDDT 3.13 3.3 3.47 Vdc Vcc-ground Supply Current Icc 285 300 mA Surge Current Isurge TBD mA Surge above steady state value SFP Host Serial Interface (TX/RX) Data Input/Output Type LVDS, AC coupled Impedance (SERDES Interface) 100 ohms Differential Transmitter (Input to SFP) Input Voltage 400 2400 mVpp Receiver (Output to SERDES) Output Voltage 875 1525 mVpp Max Off Voltage 170 mVpp Rise Time, 20%–80% 100 200 ps Total Jitter 80 120 ps Skew 15 30 ps IMPEDANCE MATCHING AND POWER SUPPLY FILTERING The SFP transceiver module’s signal inputs/outputs are AC coupled and internally terminated to 100 ohms (TD+, TD-, RD+, RD-). Each leg of the differential pair is equally matched in length to reduce signal skew. Figure 2. Recommended Host Board Supply Filtering Network VccT VccR SFP Module 0.1µF 0.1µF 10µF 1.0µH 1.0µH 0.1µF 10µF 3.3V |
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