Introduction

STV6437

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Doc ID 019028 Rev 1

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Introduction

The STV6437 is an I²C-controlled integrated circuit for filtering and buffering audio and

video signals in any consumer electronics application with HD component and SD analog

outputs. It can be used in products such as HD set-top boxes or DVD/BD players and

recorders.

The STV6437 has a high level of integration and requires only the usual passive

components for decoupling and termination. The tiny package VFQFPN-28 ensures a small

footprint.

The STV6437 is one of the family of three, pin-compatible products (Figure 1) that complete

the new generation of audio and video switches and buffers from STMicroelectronics.

Together they cover, both technically and price-wise, the whole market spectrum from

mid-range SD retail (zapper set-top boxes or basic recorders) up to DVR HD operators

(set-top boxes or recorders with HD component output).

Features

Benefits

DC-coupled video inputs.

Reduces component count.

AC- and DC-coupled high-drive capability video

outputs (for 70-

Ω (minimum) loads).

Connects to any type of display and drives several

composite and RF modulator outputs without

external active components.

Smart pop-noise manager.

Allows silent swap between active and standby

modes.

Selective standby command for audio and each

set of SD or HD video outputs.

As low as 4-mW standby consumption supporting

compliance to 0.5-W standby requirements.

8-step selectable audio gain up to +28 dB,

supporting output of 3.1 V RMS (minimum).

Easy fine-tune of THD and SNR depending on

requirements, whilst matching any specific audio

output level, including China Cable, and saving

external op-amps.

Pin-compatibility with two other products.

Combines single-device space-saving (up to 50%)

benefits with commodity price/flexibility benefits to

allow a single PCB design covering the entire

market spectrum.

Pin-compatibility with STV6440AJ.

Provides dual-source solution at no cost premium

in case of market shortage or sudden rise in

demand.