DS90CR216

DS90CR215/DS90CR216 +3.3V Rising Edge Data Strobe LVDS 21-Bit Channel Link-66 MHz March 1999 DS90CR215/DS90CR216 +3.3V Rising Edge Data Strobe LVDS 21-Bit Channel Link - 66 MHz General Description The DS90CR215 transmitter converts 21 bits of CMOS/TTL data into three LVDS (Low Voltage Differential Signaling) data streams. A phase-locked transmit clock is transmitted in parallel with the data streams over a fourth LVDS link. Every cycle of the transmit clock 21 bits of input data are sampled and transmitted. The DS90CR216 receiver converts the LVDS data streams back into 21 bits of CMOS/TTL data. At a transmit clock frequency of 66 MHz, 21 bits of TTL data are transmitted at a rate of 462 Mbps per LVDS data channel. Using a 66 MHz clock, the data throughput is 1.386 Gbit/s (173 Mbytes/s). The multiplexing of the data lines provides a substantial cable reduction. Long distance parallel single-ended buses typically require a ground wire per active signal (and have very limited noise re...