Datasheet

8
LT1675/LT1675-1
16751fb
PIN FUNCTIONS
UUU
SELECT (Pin 10): Channel Select. Use this pin to select
between RGB1 inputs and RGB2 inputs. Use this pin for
fast toggling. HIGH Selects RGB1.
V
–
(Pins 11, 12): Negative Power Supply. Connect these
pins to –5V and bypass with a good tantalum capacitor
(4.7µF). The pin may also require a 0.1µF or 0.01µF
depending on layout.
V
OUT BLUE
(Pin 13): Blue Output. It is twice BLUE 1 or BLUE
2 depending on which channel is selected by Pin 10. V
OUT
BLUE
drives 50Ω or 75Ω double-terminated cables. Do not
add capacitance to this pin.
V
OUT GREEN
(Pin 14): Green Output. It is twice GREEN 1 or
GREEN 2 depending on which channel is selected by Pin
10. V
OUT GREEN
drives 50Ω or 75Ω double-terminated
cables. Do not add capacitance to this pin.
V
OUT RED
(Pin 15): Red Output. It is twice RED 1 or RED 2
depending on which channel is selected by Pin 10. V
OUT
RED
drives 50Ω or 75Ω double-terminated cables. Do not
add capacitance to this pin.
V
+
(Pin 16): Positive Power Supply. Connect this pin to 5V
and bypass with a good tantalum capacitor (4.7µF). The
pin may also require a 0.1µF or 0.01µF depending on
layout.
V
OUT
(Pin 6): It is twice V
IN1
or V
IN2
depending on which
channel is selected by Pin 5. V
OUT
drives 50Ω or 75Ω
double-terminated cables. Do not add capacitance to this
pin.
ENABLE (Pin 7): Ground this pin for normal operation.
Take this pin to within 300mV of V
+
, or open to shut down
the part. This pin is also used for router applications. When
the part is disabled, the supply current is 0.3µA.
V
+
(Pin 8): Connect this pin to 5V and bypass with a good
tantalum capacitor (4.7µF). The pin may also require a
0.1µF or 0.01µF depending on layout.
LT1675-1
V
IN1
(Pin 1): The 1V video input signal to be switched is
applied to this pin. If 2V is applied to this pin, V
OUT
will clip.
The input must be terminated.
GND (Pin 2): Signal Ground. Connect to ground plane.
V
IN2
(Pin 3): The 1V video input signal to be switched is
applied to this pin. If 2V is applied to this pin, V
OUT
will clip.
The input must be terminated.
V
–
(Pin 4): Connect this pin to – 5V and bypass with good
tantalum capacitor (4.7µF). The pin may also require a
0.1µF or 0.01µF depending on layout.
SELECT (Pin 5): Use this pin to select V
IN1
or V
IN2
. Use this
pin for fast toggling. HIGH Selects V
IN1
.
LT1675
RED 1 (Pin 1): Red 1 Input. The 1V video input signal to be
switched is applied to this pin. If 2V is applied to this pin,
V
OUT RED
will clip. The input must be terminated.
GREEN 1 (Pin 2): Green 1 Input. The 1V video input signal
to be switched is applied to this pin. If 2V is applied to this
pin, V
OUT GREEN
will clip. The input must be terminated.
BLUE 1 (Pin 3): Blue 1 Input. The 1V video input signal to
be switched is applied to this pin. If 2V is applied to this pin,
V
OUT BLUE
will clip. The input must be terminated.
GND (Pins 4, 5): Signal Ground. Connect to ground plane.
RED 2 (Pin 6): Red 2 Input. The 1V video input signal to be
switched is applied to this pin. If 2V is applied to this pin,
V
OUT RED
will clip. The input must be terminated.
GREEN 2 (Pin 7): Green 2 Input. The 1V video input signal
to be switched is applied to this pin. If 2V is applied to this
pin, V
OUT GREEN
will clip. The input must be terminated.
BLUE 2 (Pin 8): Blue 2 Input. The 1V video input signal to
be switched is applied to this pin. If 2V is applied to this pin,
V
OUT BLUE
will clip. The input must be terminated.
ENABLE (Pin 9): Chip Enable. Ground this pin for normal
operation. Take this pin to within 300mV of V
+
, or open to
shut down the part. This pin is also used for router
applications. When the part is disabled, the supply current
is 1µA.