19-37ꢀ0; Rev 1; 3/09
Complete Audio/Video
Backend Solution
MAX4079
General Description
Features
The MAX4079 filters and buffers video (NTSC/PAL/DVB)
and stereo audio signals from the MPEG decoder of a
cable/satellite receiver, VCR/DVD player, or a TV to an
external load. The MAX4079 has luma-chroma (Y-C)
and composite (CVBS) video inputs with one Y-C and
two CVBS outputs. All video inputs are AC-coupled with
internal DC biasing on the chroma input and active
clamps for the luma and composite.
♦ Integrated Video Reconstruction Filters—6MHz
Lowpass Filter Supports NTSC, PAL, or DVB per
ITU-601
♦ Integrated Video and Audio Amplifiers
♦ Integrated Video Input Clamps and Biasing
♦ Mono Audio and CVBS Output to Drive External
Modulator
The MAX4079 video reconstruction filters have a 6MHz
cutoff frequency and 50dB attenuation at 27MHz. The
filters are matched with flat group delay for standard-
definition video. The video gain is fixed at +6dB to drive
a 75Ω back-terminated load (150Ω) to unity gain. The
video outputs can be either DC- or AC-coupled and are
powered by a single +5V supply.
♦ +5V (Video) and +9V to +12V (Audio) Single-
Supply Operation
♦ Differential/Single-Ended Audio Inputs
♦ 24-Pin TSSOP Package
The MAX4079 audio amplifiers have differential inputs
for optimum performance, but can be used with single-
ended sources with external biasing. The audio chan-
Ordering Information
nels have a fixed gain of +6dB and deliver 2.6V
RMS
PART
TEMP RANGE
PIN-PACKAGE
output with a differential input of 1.ꢀ5V. The audio
amplifiers operate from a +9V to +12V single supply
and feature an internal bias generator. An on-chip
mixer also provides a mono output, with +3dB gain,
derived from the left and right audio channels.
MAX4079CUG+
0°C to +70°C
24 TSSOP
+Denotes lead(Pb)-free package.
Functional Diagram
The MAX4079 is available in 24-pin TSSOP package,
and is fully specified over the 0°C to +70°C commercial
temperature range. The MAX4079 Evaluation Kit is
available to help speed designs.
VVID
AUDV
REXT
LP
FILTER
+6dB
CLAMP
YOUT
YIN
CIN
Applications
Satellite Receivers
Cable Receivers
Home Theater Systems
DVD Players
LP
FILTER
BIAS
COUT
+6dB
+6dB
NETWORK
CLAMP
CVBSOUT1
LP
FILTER
CVBSIN
CVBSOUT2
ROUT1
+6dB
+6dB
AV Receivers
Televisions
RINP
RINN
LINP
LINN
+6dB
+3dB
ROUT2
MONO
Pin Configuration appears at end of data sheet.
LOUT1
LOUT2
+6dB
+6dB
MAX4079
CBYPASS
GAUD
GVID
________________________________________________________________ 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.