DS92LV0421_15 Datasheet, PDF (39/48 Pages) Texas Instruments – 10 - 75 MHz Channel Link II Serializer/Deserializer with LVDS Parallel Interface

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DS92LV0421, DS92LV0422
SNLS325C – MAY 2010 – REVISED APRIL 2013
Channel Link
TxOUT3
TxOUT2
TxOUT1
TxOUT0
DS92LV0422
Settings
Table 15. Deserializer Alternate Color / Data Mapping
Bit Number
Bit 26
Bit 25
Bit 24
Bit 23
Bit 22
Bit 21
Bit 20
Bit 19
Bit 18
Bit 17
Bit 16
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
N/A
RGB (LSB
Example)
B1
B0
G1
G0
R1
R0
DE
VS
HS
B7
B6
B5
B4
B3
B2
G7
G6
G5
G4
G3
G2
R7
R6
R5
R4
R3
R2
MAPSEL = 0
DS92LV2421
B1
B0
G1
G0
R1
R0
DE
VS
HS
B7
B6ROUT10
B5
B4
B3
B2
G7
G6
G5
G4
G3
G2
R7
R6
R5
R4
R3
R2
N/A
CONFIG [1:0] =
00
DS90UR241
DS99R421Q
N/A
DIN20
RxIN2
DIN19
DIN18
DIN17
DIN16
DIN15
DIN14
DIN13
RxIN1
DIN12
DIN11
DIN10
DIN9
DIN8
DIN7
DIN6
RxIN0
DIN5
DIN4
DIN3
DIN2
DIN1
DIN0
DIN923
OS2
DIN922
OS1
DIN921
OS0
CONFIG [1:0] = 10
DS90C241
DIN20
DIN19
DIN18
DIN17
DIN16
DIN15
DIN14
DIN13
DIN12
DIN11
DIN10
DIN9
DIN8
DIN7
DIN6
DIN5
DIN4
DIN3
DIN2
DIN1
DIN0
DIN923
DIN922
DIN921
CONFIG [1:0] =
11
PCB LAYOUT AND POWER SYSTEM CONSIDERATIONS
Circuit board layout and stack-up for the LVDS devices should be designed to provide low-noise power feed to
the device. Good layout practice will also separate high frequency or high-level inputs and outputs to minimize
unwanted stray noise pickup, feedback and interference. Power system performance may be greatly improved by
using thin dielectrics (2 to 4 mils) for power / ground sandwiches. This arrangement provides plane capacitance
for the PCB power system with low-inductance parasitics, which has proven especially effective at high
frequencies, and makes the value and placement of external bypass capacitors less critical. External bypass
capacitors should include both RF ceramic and tantalum electrolytic types. RF capacitors may use values in the
range of 0.01 uF to 0.1 uF. Tantalum capacitors may be in the 2.2 uF to 10 uF range. Voltage rating of the
tantalum capacitors should be at least 5X the power supply voltage being used.
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