DS90CR218 - National Semiconductor

DS90CR218 +3.3V Rising Edge Data Strobe LVDS

The DS90CR217 (see DS90CR217/218A datasheet) transmitter converts 21 bits of CMOS/TTL data into three LVDS (Low Voltage Differential Signaling) data streams. A phaselocked 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 DS90CR218 .

Features

n 20 to 75 MHz shift clock support n 50% duty cycle on receiver output clock n Best-in-Class Set & Hold Times on TxINPUTs and RxOUTPUTs n Low power consumption n Tx + Rx Powerdown mode < 400µW (max) n ± 1V common-mode range (around +1.2V) n Narrow bus reduces cable size and cost n Up to 1.575 Gbps throughput n Up to 197 Mbytes/sec bandwidth n 345 mV (typ) swing LVDS devices for low EMI n PLL requires no external components n Rising edge data strobe n Compatible with TIA/EIA-644 LVDS standard n Low profile 48-lead TSSOP package Block Diagrams DS90CR217 DS90CR218 10087101 10087127 Order Numb.