MAX4397 Datasheet, PDF (1/30 Pages) Maxim Integrated Products – Audio/Video Switch For Dual SCART Connectors

19-3618; Rev 0; 4/05
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Audio/Video Switch for Dual SCART Connectors
General Description
The MAX4397 dual SCART switch matrix routes audio
and video signals between an MPEG encoder and two
external SCART connectors under I²C* control, and
meets the requirements of EN50049-1, IEC 933-1,
Canal+, and BskyB standards.
The video and audio channels feature input source
selection multiplexers, input buffers, and output buffers
for routing all inputs to selected outputs. The MAX4397D
audio encoder input is differential DC-coupled, while the
MAX4397S audio encoder input is single-ended AC-
coupled. Except for the MAX4397D’s audio encoder
input, all other inputs and outputs are AC-coupled with
internal DC-biasing set to predefined levels.
The MAX4397 provides programmable gain control from
+5dB to +7dB in 1dB steps for Red, Green, and Blue
component video signals. All other video outputs have a
fixed +6dB gain. Additional features include an internal
Luma and Chroma (Y/C) mixer that generates a
Composite video signal (CVBS) to supply an RF
modulator output, and internal video reconstruction low-
pass filters with a cutoff frequency of 6MHz. The
MAX4397 TV audio channel features clickless switching
and programmable volume control from -56dB to +6dB in
2dB steps. The VCR audio output also has programmable
gain for -6dB, 0dB, or +6dB. The device also generates
monaural audio from left and right stereo inputs. All audio
drivers deliver a 3.0V_RMS minimum output.
The MAX4397 operates with standard 5V and 12V
power supplies and supports slow-switching and fast-
switching signals. The I²C interface programs the
gain and volume control, and selects the input source
for routing.
The MAX4397 is available in a compact 48-pin thin
QFN package and is specified over the 0°C to +70°C
commercial temperature range.
Applications
Satellite Set-Top Boxes
Cable Set-Top Boxes
TVs
VCRs
DVDs
Features
♦ Video Outputs Drive 2V_P-P into 150Ω
♦ Audio Outputs Drive 3V_RMS into 10kΩ
♦ Clickless, Popless Audio Gain Control and
Switching
♦ AC-Coupled Video Inputs with Internal Clamp and
Bias
♦ DC-Coupled Video Outputs
♦ Composite Video Signal Created Internally from
Y/C Inputs
♦ Internal Video Reconstruction Filters Provide
-35dB at 27MHz
♦ Differential (MAX4397D) or Single-Ended
(MAX4397S) Audio Encoder Input
♦ Red/Chroma Switch for Bidirectional I/O
♦ I²C-Programmable RGB Gain from +5dB to +7dB
♦ I²C-Programmable Audio Gain Control from +6dB
to -56dB
♦ Meets EN50049-1, IEC 933-1, Canal+, and BSkyB
Requirements
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX4397DCTM
0°C to +70°C
48 Thin QFN-EP*
(7mm x 7mm)
MAX4397SCTM
0°C to +70°C
48 Thin QFN-EP*
(7mm x 7mm)
*EP = Exposed paddle.
Pin Configuration and Typical Application Circuits appear at
end of data sheet.
System Block Diagram appears at end of data sheet.
*Purchase of I²C components from Maxim Integrated Products,
Inc. or one of its sublicensed Associated Companies, conveys
a license under the Philips I²C Patent Rights to use these com-
ponents in an I²C system, provided that the system conforms
to the I²C Standard Specification as defined by Philips.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.