STV6417 查看數據表（PDF） - STMicroelectronics

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STV6417

Audio/video switch and 6-channel SD video filter

STMicroelectronics 

Description

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Description

STV6417

The STV6417 is an I²C-controlled integrated circuit designed to switch both audio and video

in any dual full-SCART application such as set-top boxes or DVD recorders for European

markets.

The STV6417 is one of the four brand new products that complete the new generation of

audio and video switches from STMicroelectronics, which cover both technically and price-

wise the whole market spectrum from low-cost SD retail (zapper set-top box or basic

recorder) up to DVR HD operator (set-top boxes or recorders with component outputs).

Its complete set of features makes it particularly adapted for all operator and high end retail

set-top boxes.

Figure 1. STMicroelectronics new generation of audio and video switches

Retail

Operator

FTA SD FTA SD SD

Zapper CI/CAS DVR

HD

SD

HD

STV6418

STV6417

STV6419

STV6416

Small footprint

The first key differentiator of the STV6417 is its size. It is supplied in a LQFP-48 7 x 7

package, compared with older generation devices that used LQFP-64 10 x 10 and LQFP-64

14 x 14 packages.

Reduced bill-of-material

A second key differentiator is the STV6417’s ability to reduce the bill-of-material. The

STV6417 can interact directly with an MPEG decoder audio output, whether it is voltage- or

current-driven. In the latter case, an integrated programmable gain allows designers to

reduce the bill-of-material by removing the need for external operational amplifier circuitry.

The STV6417 video inputs can be driven either in AC- or DC-coupled mode from the MPEG

decoder video DAC outputs, again decreasing the need for external components.

The STV6417 can drive AC- or DC-coupled output loads, saving the need for additional

external buffer circuitry or coupling capacitors. A dedicated video and a mono audio output

are available to drive an RF modulator.

The STV6417 integrates 6 dB video buffers in series with each of the six by-passable

standard definition (SD) low-pass filters. It can connect to six video DAC outputs of the

MPEG decoder, allowing it to switch and drive at the same time the composite and RGB

signals on the TV SCART outputs, as well as the S-video signal on the VCR SCART output.

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