LT1675 datasheet(8/16 Pages) LINER

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LT1675/LT1675-1

PIN FUNCTIONS

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 good tantalum capacitor

(4.7

µF). The pin may also require a 0.1µF or 0.01µF

depending on layout.

VOUTBLUE (Pin13): Blue Output. It is twice BLUE 1 or BLUE

2 depending on which channel is selected by Pin 10. VOUT

BLUE drives 50Ω or 75Ω double-terminated cables. Do not

add capacitance to this pin.

VOUT GREEN (Pin14): Green Output. It is twice GREEN 1 or

GREEN 2 depending on which channel is selected by Pin

10. VOUT GREEN drives 50Ω or 75Ω double-terminated

cables. Do not add capacitance to this pin.

VOUT RED (Pin 15): Red Output. It is twice RED 1 or RED 2

depending on which channel is selected by Pin 10. VOUT

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 good tantalum capacitor (4.7

µF). The pin

may also require a 0.1

µF or 0.01µF depending on layout.

VOUT (Pin 6): It is twice VIN1 or VIN2 depending on which

channel is selected by Pin 5. VOUT 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 0.3

µA.

V + (Pin 8): Connect this pin to 5V and bypass with good

tantalum capacitor (4.7

µF). The pin may also require a

0.1

µF or 0.01µF depending on layout.

LT1675-1

VIN1 (Pin 1): The 1V video input signal to be switched is

applied to this pin. If 2V are applied to this pin, VOUT will

clip. The input must be terminated.

GND (Pin 2): Signal Ground. Connect to ground plane.

VIN2 (Pin 3): The 1V video input signal to be switched is

applied to this pin. If 2V are applied to this pin, VOUT will

clip. The input must be terminated.

V – (Pin 4): Connect this pin to – 5V and bypass with good

tantalum capacitor (4.7

µF). The pin may also require a

0.1

µF or 0.01µF depending on layout.

SELECT (Pin 5): Use this pin to select VIN1 or VIN2. Use this

pin for fast toggling. HIGH Selects VIN1.

LT1675

RED 1 (Pin 1): Red 1 Input. The 1V video input signal to be

switched is applied to this pin. If 2V are applied to this pin,

VOUT 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 are applied to this

pin, VOUT 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 are applied to this

pin, VOUT 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 are applied to this pin,

VOUT 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 are applied to this

pin, VOUT 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 are applied to this

pin, VOUT 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 1

µA.

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