DS90CR287 Datasheet | National Semiconductor

Description The DS90CR287 transmitter converts 28 bits of CMOS/TTL data into four LVDS (Low Voltage Differential Signaling) data streams. A phase-locked transmit clock is transmitted in parallel with the data streams over a fifth LVDS link. Every cycle of the transmit clock 28 bits of input data are sampled and transmitted. The DS90CR288A receiver converts the four LVDS data streams back into 28 bits of CMOS/TTL data. At a transmit clock frequency of 85 MHZ, 28 bits of TTL data are transmitted at a rate of 595 Mbps per LVDS data channel. Using a 85 MHZ clock, the data throughput is 2.38 Gbit/s (297.5 Mbytes/sec). This chipset is an ideal means to solve EMI and cable size problems associated with wide, high speed TTL interfaces. Features n n n n n n n n n n n n n 20 to 85 MHZ shift clock support 50% duty cycle on receiver output clock Best- in- Class Set & Hold Times on Tx INPUTs Low power consumption ± 1V mon mode range (around +1.2V) Narrow bus reduces cable size and cost Up to 2.38 Gbps throughput Up to 297.5 Megabytes/sec bandwidth 345 m V (typ) swing LVDS devices for low EMI PLL requires no external ponents Rising edge data strobe patible with TIA/EIA-644 LVDS standard Low profile 56-lead TSSOP package Block Diagrams DS90CR287 DS90CR288A DS101087-1 DS101087-27 Order Number DS90CR287MTD See NS Package Number MTD56 Order Number DS90CR288AMTD See NS Package Number MTD56 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS101087 .national. DS90CR287/DS90CR288A Pin Diagrams DS90CR287 DS90CR288A DS101087-21 DS101087-22 Typical Application DS101087-23 .national. DS90CR287/DS90CR288A Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) CMOS/TTL Input Voltage CMOS/TTL Output Voltage LVDS Receiver Input Voltage LVDS Driver...