Channel Link Evaluation Kit User Manual
National Semiconductor Corporation
Interface Products
LIT# CLINK3V28BT-85-UM
Rev 2.1
Date: 10/12/2005
Page 4 of 28
Contents of the Evaluation Kit:
1) One Transmitter board with the DS90CR287MTD - 28 bit Transmitter
2) One Receiver board with the DS90CR288AMTD - 28 bit Receiver
3) One 2-meter Amphenol Spectra Strip Cable interface
4) One 60-pin IDC Flat Ribbon Cable
5) Evaluation Kit Documentation (this manual)
6) DS90CR287/288A Datasheet
7) Channel Link Application Notes AN-1041 and AN-1108
Channel Link Typical Application:
PCB
PCB
SHIELD
LVDS Cable
(media dependent)
GND
RxCLK
TX
DS90CR287
RX
DS90CR288A
RxOUT
0
1
2
25
26
27
TxIN
0
1
2
25
26
27
TxCLK
/PD
/PD
LVCMOS/
LVTTL
The diagram above illustrates the use of the Channel Link chipset (Tx/Rx). This
chipset is able to transmit 28 bits of LVTTL/LVCMOS data using four LVDS channels
for a total throughput of 2.38 Gbps (297.5 Mbytes/s).
Input clock rate is specified to be between 20 MHz to 85 MHz maximum. The
interconnect between the two devices may be a variety of media including: twisted
pair cables, twin-ax cables, and / or backplanes for example. Driving between the
two devices is a function of interconnect skew and clock rate. Distances up to ten
meters are possible at the lower clock rates and distances of 1 to 2 meters is
possible at the higher clock rates. Please refer to the chipset datasheet for more
information and parametric tables.
