DS90CR211MTD ,21-Bit Channel Link [Life-time buy]Featuresa transmit clock frequency of 40 MHz, 21 bits of TTL data aretransmitted at a rate of 280 M ..
DS90CR212MTD ,21-Bit Channel Link [Life-time buy]General Descriptionwidth, providing a system cost savings, reduces connectorThe DS90CR211 transmitt ..
DS90CR212MTDX ,21-Bit Channel Link [Life-time buy]DS90CR211/DS90CR212 21-Bit Channel LinkJuly 1997DS90CR211/DS90CR21221-Bit Channel Linkneeded. This ..
DS90CR213 ,21-Bit Channel LinkDS90CR213/DS90CR21421-BitChannelLinkÐ66MHzPRELIMINARYDecember1996DS90CR213/DS90CR21421-BitChannelLi ..
DS90CR213MTD ,21-Bit Channel LinkGeneral Descriptionnector physical size and cost, and reduces shielding require-The DS90CR213 trans ..
DS90CR214 ,21-Bit Channel LinkFeaturesof TTL data are transmitted at a rate of 462 Mbps per LVDSY66 MHz Clock Supportdata channel ..
DS90CR211MTD-DS90CR212MTD-DS90CR212MTDX
21-Bit Channel Link [Life-time buy]
DS90CR211/DS90CR212
21-Bit Channel Link
General DescriptionThe DS90CR211 transmitter converts21bitsof CMOS/TTL
data into three LVDS (Low Voltage Differential Signaling)
data streams.Aphase-locked transmit clock istransmittedin
parallelwiththe data streams overa fourth LVDSlink. Every
cycleofthe transmit clock21bitsof input dataare sampled
and transmitted. The DS90CR212 receiver convertsthe
LVDS data streams backinto21bitsof CMOS/TTL data.At transmitclock frequencyof 40MHz,21 bitsofTTL dataare
transmittedata rateof 280 Mbpsper LVDS data channel.
Usinga40 MHz clock, the data throughputis 840
Mbit/s(105 Mbyte/s).
The multiplexingofthe data lines providesa substantial
cable reduction. Long distance parallel single-ended buses
typically requirea ground wireper active signal (and have
verylimited noiserejectioncapability).Thus,fora 21-bit wide
databusand one clock,upto44 conductorsare required.
Withthe Channel Link chipsetasfewas9 conductors(3
data pairs,1 clockpairanda minimumofone ground)are
needed. This providesa 80% reductionin required cable
width, providinga system cost savings, reduces connector
physical size, andreduces shieldingrequirements duetothe
cables smaller form factor.
The21 CMOS/TTL inputs can supporta varietyof signal
combinations.For example,5 4-bit nibbles plus1 control,or 9-bit (byte+ parity)and3 control.
Features Narrowbus reduces cable sizeand cost ±1V Common mode range (ground shifting) 290mV swing LVDS data transmission 840 Mbit/s data throughput Low swing differential current mode drivers reduce EMI Rising edge data strobe Power down mode Offeredinlow profile 48-lead TSSOP package
Block DiagramsTRI-STATE®isa registeredtrademark ofNationalSemiconductorCorporation.
DS90CR211DS012637-27
Order Number DS90CR211MTD
SeeNS Package Number MTD48
DS90CR212DS012637-1
Order Number DS90CR212MTD
SeeNS Package Number MTD48July 1997
DS90CR21
1/DS90CR212
21-Bit
Channel
Link 1998 National Semiconductor Corporation DS012637
