LMH6580 Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – 8x4 500MHz Analog Crosspoint Switch, Gain of 1, Gain of 2

September 2007
LMH6580/LMH6581
8x4 500 MHz Analog Crosspoint Switch, Gain of 1,
Gain of 2
General Description
The LMH^® family of products is joined by the LMH6580 and
the LMH6581, high speed, non-blocking, analog, crosspoint
switches. The LMH6580/LMH6581 are designed for high
speed, DC coupled, analog signals such as high resolution
video (UXGA and higher). The LMH6580/LMH6581 each has
eight inputs and four outputs. The non-blocking architecture
allows any output to be connected to any input, including an
input that is already selected. With fully buffered inputs the
LMH6580/LMH6581 can be impedance matched to nearly
any source impedance. The buffered outputs of the
LMH6580/LMH6581 can drive up to two back terminated
video loads (75Ω load). The outputs and inputs also feature
high impedance inactive states allowing high performance in-
put and output expansion for array sizes such as 8 x 8 or 16
x 4 by combining two devices. The LMH6580/LMH6581 are
controlled with a 4 pin serial interface that can be configured
as a 3 wire interface. Both serial mode and addressed modes
are available.
The LMH6580/LMH6581 come in 48-pin TQFP packages.
They also have diagonally symmetrical pin assignments to
facilitate double sided board layouts and easy pin connec-
tions for expansion.
Features
■ ^{8 inputs and 4 outputs}
■ ^{48-pin TQFP package}
■ ^{−3 dB bandwidth (V}_OUT ^{= 2 V}_PP^{, R}_L ^{= 1 kΩ) 500 MHz}
■ ^{−3 dB bandwidth (V}_OUT ^{= 2 V}_PP^{, R}_L ^{= 150Ω) 450 MHz}
■ ^{Fast slew rate}
2100 V/μs
■ ^{Channel to channel crosstalk (10/100 MHz) −70/ −52 dBc}
■ ^{All hostile crosstalk (10/100 MHz)}
−55/−45 dBc
■ ^{Easy to use serial programming}
4 wire bus
■ ^{Two programming modes Serial & addressed modes}
■ ^{Symmetrical pinout facilitates expansion.}
■ ^{Output current}
±70 mA
■ ^{Two gain options}
A_V = 1 or A_V = 2
Applications
■ ^{Studio monitoring/production video systems}
■ ^{Conference room multimedia video systems}
■ ^{KVM (keyboard video mouse) systems}
■ ^{Security/surveillance systems}
■ ^{Multi-antenna diversity radio}
■ ^{Video test equipment}
■ ^{Medical imaging}
■ ^{Wide-band routers & switches}
Connection Diagram
Block Diagram
30007202
LMH^® is a registered trademark of National Semiconductor Corporation.
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
© 2007 National Semiconductor Corporation 300072
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