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ORT4622 Datasheet(PDF) 44 Page - Agere Systems |
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ORT4622 Datasheet(HTML) 44 Page - Agere Systems |
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44 / 90 page  ORCA ORT4622 FPSC Preliminary Data Sheet Four-Channel x 622 Mbits/s Backplane Transceiver March 2000 44 Lucent Technologies Inc. Lucent Technologies Inc. LVDS I/O (continued) LVDS Receiver Buffer Requirements Table 23. LVDS Receiver dc Data * Buffer will not produce output transition when input is open-circuited. Note: VDD = 3.1 V—3.5 V, 0 °C —125 °C, slow-fast process. Table 24. LVDS Receiver ac Data Table 25. LVDS Receiver Power Consumption Table 26. LVDS Operating Parameters Note: Under worst-case operating condition, the LVDS driver will withstand a disabled or unpowered receiver for an unlimited period of time without being damaged. Similarly, when outputs are short-circuited to each other or to ground, the LVDS will not suffer permanent damage. The LVDS driver supports hot-insertion. Under a well-controlled environment, the LVDS I/O can drive backplane as well as cable. Parameter Symbol Test Conditions Min Typ Max Unit Receiver Input Voltage Range, VIA or VIB VI |VGPD| < 925 mVdc 1 MHz 0 1.2 2.4 V Receiver Input Differential Threshold |VIDTH||VGPD| < 925 mV 400 MHz –100 — 100 mV Receiver Input Differential Hysteresis VHYST VIDTHH – VIDTHL —— —* mV Receiver Differential Input Impedance RIN With built-in termination, center-tapped 80 100 120 Ω Symbol Parameter Test Conditions Min Max Unit TPWD Receiver Output Pulse-width Distortion |VIDTH| = 100 mV 311 MHz —TBD ps TPLH, TPHL Propagation Delay Time CL = 1.5 pF 0.75 0.74 1.65 1.82 ns — With Common-mode Variation, (0 V to 2.4 V) CL = 1.5 pF — 50 ps TRISE Receiver Output Signal Rise Time, VOD 20% to 80% CL = 1.5 pF 150 350 ps TFALL Receiver Output Signal Fall Time, VOD 80% to 20% CL = 1.5 pF 150 350 ps Symbol Parameter Test Conditions Min Max Unit PRdc Receiver dc Power dc — 34.8 mW PRac Receiver ac Power ac, CL = 1.5 pF — 0.026 mW/MHz Parameter Test Conditions Min Normal Max Unit Transmit Termination Resistor — — 100 — Ω Receiver Termination Resistor — — 50 — Ω Temperature Range — –40 — 125 °C Power Supply VDD — 3.1 — 3.5 V Power Supply VSS —— 0 — V |
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