MAX7453 Datasheet, PDF (1/5 Pages) Maxim Integrated Products – Triple-Channel Video Reconstruction Filter and Buffer for Composite and Y/C Outputs

19-3269; Rev 0; 6/05
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
General Description
The MAX7453 is a low-cost, triple-channel video recon-
struction filter for S-video and CVBS video-signal appli-
cations. This device is ideal for anti-aliasing and DAC
smoothing video applications such as set-top boxes,
DVD players, hard-disk recorders (HDRs), and personal
video recorders. This filter operates from a single +5V
supply. It is optimized for NTSC, PAL, and standard-defi-
nition TV (SDTV) video systems.
Each channel consists of a lowpass filter and an output
buffer capable of driving one (YOUT, COUT) or two
(CVOUT) standard 150Ω video loads. The output buffers
can drive either an AC or a DC load such that the blank-
ing level voltage after the backmatch resistor is less than
1V. The Y and C video inputs are summed to produce
the composite video output. The MAX7453 has a maxi-
mally flat frequency response.
The MAX7453 is available in an 8-pin SO package and is
fully specified over the commercial (0°C to +70°C) tem-
perature range.
Applications
Set-Top Boxes/HDRs/DVDs
Security Cameras/Digital Cameras
Game Consoles
Digital VCRs
Every Composite, S-Video Output for NTSC,
PAL, and SDTV
Features
♦ Triple-Channel Filter and Buffer for CVBS and
Y/C (S-Video) Video Signals
♦ Filter Response Ideal for NTSC, PAL, and
Interlaced SDTV Signals
♦ 42dB (typ) Stopband Attenuation at 27MHz
♦ -0.3dB (typ) Passband Response
♦ <1V Blanking Level Allows DC-Coupled Output
♦ CVOUT Drives Two 150Ω Video Loads
♦ YOUT and COUT Drive One 150Ω Video Load
♦ +5V Single-Supply Voltage
♦ 8-Pin SO Package
PART
MAX7453CSA
Ordering Information
TEMP RANGE
0°C to +70°C
PIN-PACKAGE
8 SO
Pin Configuration
TOP VIEW
YIN 1
N.C. 2
GND 3
CIN 4
MAX7453
8 YOUT
7 V_CC
6 CVOUT
5 COUT
SO
Functional Diagram
V_CC
*
ENCODER
YIN
LOWPASS
D/A
FILTER
+6dB
YOUT
*
MAX7453
Σ
+6dB
CVOUT
*
CIN
LOWPASS
D/A
FILTER
GND
COUT
+6dB
*
________________________________________________________________ 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.