SCAN90CP02 Datasheet, PDF (3/12 Pages) National Semiconductor (TI) – 1.5 Gbps 2x2 LVDS Crosspoint Switch with Pre-Emphasis and IEEE 1149.6

Connection Diagrams
LLP Top View
DAP = GND
20071403
LQFP Top View
20071404
Configuration Select Truth Table
SEL0
SEL1
EN0
EN1
OUT0
OUT1
Mode
0
0
0
0
IN0
IN0 1:2 Splitter (IN1 powered down)
0
1
0
0
IN0
IN1 Dual Channel Repeater
1
0
0
0
IN1
IN0 Dual Channel Switch
1
1
0
0
IN1
IN1 1:2 Splitter (IN0 powered down)
0
1
0
1
IN0
PD Single Channel Repeater (Channel 1 powered down)
1
1
0
1
IN1
PD Single Channel Switch (IN0 and OUT1 powered down)
0
0
1
0
PD
IN0 Single Channel Switch (IN1 and OUT0 powered down)
0
1
1
0
PD
IN1 Single Channel Repeater (Channel 0 powered down)
X
X
1
1
PD
PD Both Channels in Power Down Mode
0
0
0
1
Invalid State*
1
0
0
1
Invalid State*
1
0
1
0
Invalid State*
1
1
1
0
Invalid State*
PD = Power Down mode to minimize power consumption
X = Don’t Care
* Entering these states is not forbidden, however device operation is not defined in these states.
Pre-emphasis
The pre-emphasis is used to compensate for long or lossy
transmission media. Separate pins are provided for each
output to minimize power consumption. Pre-emphasis is
programmable to be off or to preset values per the Pre-
emphasis Control Selection Table.
Output Characteristics
The output characteristics of the SCAN90CP02 device have
been optimized for point-to-point backplane and cable appli-
cations.
Pre-emphasis Control Selection Table
Channel 0
PEM01 PEM00
0
0
0
1
1
0
1
1
Channel 1
PEM11 PEM10
0
0
0
1
1
0
1
1
Pre-emphasis
0%
25%
50%
100%
3
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