Datasheet

11
LT1675/LT1675-1
16751fb
APPLICATIONS INFORMATION
WUU
U
CABLE
75Ω
R2
75Ω
1675 F05
750Ω
75Ω
750Ω
OFF
750Ω
75Ω
750Ω
OFF
750Ω
R1
75Ω
75Ω
750Ω
ON
n
.
.
.
⇒
1575
n – 1
n = NUMBER OF LT1675s
IN PARALLEL
Figure 5. Off Channels Load the Cable Termination
with 1575Ω Each
0V
500mV/DIV
0V
1V
1V
RED 1
INPUT
500mV/DIV
RED
OUTPUT
CHIP SELECT = 0V, IC #2 DISABLED
1675 F07
Figure 7. 4-Input Router Response
Figure 6. Two LT1675s Build a 4-Input RGB Router
R1
R2
R3
R4
CHIP
SELECT
1675 F06
ENABLE
LT1675 #1
75Ω
A
V
= 2
LT1675 #2
74HC04
ENABLE
75Ω
RED
OUT
A
V
= +2
75Ω
5V
0V
0V
RED
OUTPUT
CHIP
SELECT
5V/DIV
1V/DIV
RED 1 INPUT = 0V
1675 F08
RED 3 INPUT = UNCORRELATED SINEWAVE
Figure 8. 4-Input Router Toggling