MAX9597 Datasheet, PDF (1/32 Pages) Maxim Integrated Products – Low-Power Audio/Video Interface for Single SCART Connectors

19-4159; Rev 1; 10/08
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Low-Power Audio/Video Interface
for Single SCART Connectors
General Description
The MAX9597 single SCART interface routes audio and
video signals between a set-top box decoder chip and
an external SCART connector under I²C control.
Operating from a 3.3V supply and a 12V supply, the
MAX9597 consumes 53mW during quiescent operation
and 254mW during average operation when driving
typical signals into typical loads.
The MAX9597 audio section contains left and right audio
paths with an independent operational amplifier at the
inputs. The DirectDrive^® output amplifiers create a
2V_RMS full-scale audio signal biased around ground,
eliminating the need for bulky output capacitors and
reducing click-and-pop noise. The zero-cross detection
circuitry also further reduces clicks and pops by
enabling audio sources to switch only during a zero-
crossing.
The MAX9597 video section contains 4 channels of
video filter amplifiers. The standard-definition video sig-
nals from the set-top box decoder chip are lowpass fil-
tered to remove out-of-bandwidth artifacts. The
MAX9597 also supports slow-switching and fast-switch-
ing signals.
The MAX9597 is available in a compact 28-pin thin
QFN package and is specified over the 0°C to +70°C
commercial temperature range.
Features
♦ 53mW Quiescent Power Consumption
♦ 5µW Shutdown Consumption
♦ Audio Operational Amplifiers to Create Input
Filters
♦ Clickless/Popless, DirectDrive Audio
♦ Video Reconstruction Filter with 10MHz Passband
and 43dB Attenuation at 27MHz
♦ 3.3V and 12V Supply Voltages
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX9597CTI+
0°C to +70°C 28 TQFN-EP*
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
Applications
Set-Top Boxes
TVs
AV Receivers
DVD Players
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
System Block Diagram
V₁₂
V_ID
V_AUD
12V 3.3V 3.3V
STB CHIP
I²C
μC
MAX9597
I²C INTERFACE
AND REGISTERS
VIDEO RGB, Y/C, CVBS
ENCODER
STEREO
AUDIO
DAC
SINGLE OR
DIFFERENTIAL
STEREO AUDIO
VIDEO FILTERS
AUDIO
WITH DirectDrive
OUTPUTS
SLOW SWITCHING
FAST SWITCHING
RGB, Y/C, CVBS
L/R AUDIO
FAST AND SLOW SWITCHING
TV
SCART
CHARGE PUMP
EP
GND
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.