Description

STV6418

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Description

The STV6418 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 STV6418 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 HD set-top boxes.

Figure 1.

STMicroelectronics new generation of audio and video switches

Small footprint

The first key differentiator of the STV6418 is its size. It is supplied in a TQFP-48 7 x 7

exposed pad 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 STV6418’s ability to reduce the bill-of-material. The

STV6418 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 STV6418 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 STV6418 can drive AC- or DC-coupled output loads, saving the need for additional

external buffer circuitry or coupling capacitors.

The STV6418 integrates 6 dB video buffers in series with each of the six switchable

standard definition (SD), enhanced definition (ED) and high definition (HD) 1080i-capable

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. But the best practice for

the STV6418 is to divert, buffer and filter the component outputs from the MPEG decoder to

FTA SD

Zapper

FTA SD

CI/CAS

SD

DVR

HD

SD

HD

STV6418

STV6417

STV6419

STV6416

Retail

Operator