The DS90CR217 transmitter converts 21 bits of CMOS/TTLdata into three LVDS (Low Voltage Differential Signaling)data streams. A phase-locked transmit clock is transmitted inparallel with the data streams over a fourth LVDS link. Everycycle of the transmit clock 21 bits of input data are sampledand transmitted. At a transmit clock frequency of 85 MHz, 21bits of TTL data are transmitted at a rate of 595 Mbps perLVDS data channel. Using a 85 MHz clock, the data throughputis 1.785 Gbit/s (223 Mbytes/sec).
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