AN2526 Datasheet, PDF (1/10 Pages) STMicroelectronics – STMAV340 has 4 channels and a 2 to 1 video switch

AN2526
Application note
STMAV340 evaluation board & PCB layout recommendation
Introduction
STMAV340 has 4 channels and a 2 to 1 video switch that is well suited for switching analog
video signals on a TV or monitor set. Below is a diagram of STMAV340 typical application
configuration. As illustrated on the picture below, the 3 channels of the switch can be used to
switch two complete sets of RGB and YPbPr to a single RGB/YPbPr output. One additional
channel can be used to switch 2 CBVS inputs to a single output that can be directly
connected to a single CVBS receiver input.
Without STMAV340 integrated in the system, the video receiver needs to have more input
pins to accommodate the many video inputs at the back panel. With the introduction of
STMAV340, less IO pins are required at the video receiver. Together with the optimized pin
arrangement, the result is a straightforward system design and overall cost reduction.
STMAV340 in a TV application
VIDEO RECEIVER
R/Y
G/Pb
B/Pr
CVBS
STMAV340
H/V SYNC
ID/VESA
RY
G Pb
B Pr CVBS1/2
April 2007
Rev 1
1/10
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