DS15MB200 Datasheet, PDF (4/10 Pages) National Semiconductor (TI) – Dual 1.5 Gbps 2:1/1:2 LVDS Mux/Buffer with Pre-Emphasis

Output Characteristics
The output characteristics of the DS15MB200 have been
optimized for point-to-point backplane and cable applica-
tions, and are not intended for multipoint or multidrop signal-
ing.
A 100Ω output (source) termination resistor is incorporated
in the device to eliminate the need for an external resistor,
providing excellent drive characteristics by locating the
source termination as close to the output as physically pos-
sible.
Pre-Emphasis Controls
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 on per the Pre-emphasis Control
Table.
PREx_n (Note 4)
0
1
Output Pre-emphasis
0%
100%
Note 4: Applies to PREA_0, PREA_1, PREB_0, PREB_1, PREL_0,
PREL_1
Multiplexer Truth Table (Note 5)
Data Inputs
Control Inputs
SIA_0 SIB_0 MUX_S0 ENL_0
X
valid
0
1
valid
X
1
1
X
X
X
0
X = Don’t Care
Z = High Impedance (TRI-STATE)
Output
LO_0
SIB_0
SIA_0
Z
Repeater/Buffer Truth Table (Note 5)
Data
Input
Control Inputs
LI_0
ENA_0 ENB_0
X
0
0
valid
0
1
valid
1
0
valid
1
1
X = Don’t Care
Z = High Impedance (TRI-STATE)
Note 5: Same functionality for channel 1
Outputs
SOA_0 SOB_0
Z
Z
Z
LI_0
LI_0
Z
LI_0
LI_0
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