DS10CP154A_14 Datasheet, PDF (12/20 Pages) Texas Instruments – DS10CP154A 1.5 Gbps 4x4 LVDS Crosspoint Switch

DS10CP154A
SNLS306C – AUGUST 2008 – REVISED APRIL 2013
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LOS Register
The LOS register reports an open inputs fault condition for each of the inputs. The following table shows the
register mapping.
Bit
Default
Bit Name
D[0]
0
LOS0
D[1]
0
LOS1
D[2]
0
LOS2
D[3]
0
LOS3
D[7:4] 0000
Reserved
Access
RO
RO
RO
RO
RO
Description
Reading a [0] from the bit D[0] indicates an open inputs fault
condition on the IN0. A [1] indicates presence of a valid
signal.
Reading a [0] from the bit D[1] indicates an open inputs fault
condition on the IN1. A [1] indicates presence of a valid
signal.
Reading a [0] from the bit D[2] indicates an open inputs fault
condition on the IN2. A [1] indicates presence of a valid
signal.
Reading a [0] from the bit D[3] indicates an open inputs fault
condition on the IN3. A [1] indicates presence of a valid
signal.
Reserved for future use. Returns undefined value when read.
INPUT INTERFACING
The DS10CP154A accepts differential signals and allows simple AC or DC coupling. With a wide common mode
range, the DS10CP154A can be DC-coupled with all common differential drivers (i.e. LVPECL, LVDS, CML). The
following three figures illustrate typical DC-coupled interface to common differential drivers. Note that the
DS10CP154A inputs are internally terminated with a 100Ω resistor.
LVDS
Driver
OUT+
100: Differential T-Line
IN+
DS10CP154
Receiver
100:
OUT-
IN-
Figure 2. Typical LVDS Driver DC-Coupled Interface to DS10CP154A Input
CML3.3V or CML2.5V
Driver
V_CC
50:
50:
OUT+
100: Differential T-Line
IN+
DS10CP154
Receiver
100:
OUT-
IN-
Figure 3. Typical CML Driver DC-Coupled Interface to DS10CP154A Input
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