April 2007

Rev 1

1/10

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

STMAV340

VIDEO RECEIVER

R

Y

G Pb

B

Pr

CVBS1/2

H/V SYNC

ID/VESA

R/Y

G/Pb

B/Pr

CVBS

www.st.com