General Description
The MAX7428/MAX7430/MAX7432A filters are low-cost,
high-performance replacements for standard discrete fil-
ter and buffer solutions. The MAX7428/MAX7430/
MAX7432A are ideal for anti-aliasing and DAC smooth-
ing video applications, when analog video is reconstruct-
ed from a digital data stream. These devices require a
single +5V supply and the filters have a cutoff frequency
optimized for NTSC, PAL, and standard definition digital
TV (SDTV) video signals. The MAX7428/MAX7430/
MAX7432A feature Maxim’s single-pin bus (MSPB)
interface to digitally control channel selection (IN_A or
IN_B), adjust high-frequency boost, bypass the filter,
configure luma vs. chroma operation, and control the
output disable. The MAX7428 single-channel filter is
ideal for composite (CVBS) video signals. The MAX7430
dual filter is optimized for S-Video (Y/C) applications. The
MAX7432A triple filter is optimized for component (YPbPr
or embedded synchronous RGB) video signals. The
MAX7428 is available in a tiny 8-pin SOT23 package, the
MAX7430 is available in a miniature 10-pin MAX pack-
age, and the MAX7432A is available in a 14-pin TSSOP
package. The MAX7428/MAX7430/MAX7432A are fully
specified over the -40°C to +85°C extended temperature
range.
Applications
Set-Top Boxes
DVD Players
Hard-Disk Recorders
Camcorders
Features
Ideal for CVBS, Y/C (S-Video), and RGB (Y Pb Pr)
Outputs for NTSC, PAL, and SDTV
6th-Order Lowpass Filter
Drives Two 150Ω Video Loads
Four Levels of Passband High-Frequency
Boost Control
Input 2 to 1 Multiplexer
Output Disable
Filter Bypassing
+5V Single-Supply Voltage
Tiny 8-Pin SOT23 Package (MAX7428), 10-Pin
MAX Package (MAX7430), and 14-Pin TSSOP
Package (MAX7432A)
MAX7428/MAX7430/MAX7432A
Standard Definition Video Reconstruction
Filters and Buffers
________________________________________________________________ Maxim Integrated Products
1
+6dB
LEVEL SHIFT
6TH-ORDER
FILTER
OUT
SERIAL INTERFACE
AND CONTROL
DATA
D/A
INA
INB
*
*OPTIONAL
SYNC
AUX INPUT
BIAS GENERATOR
GND
REXT
ENCODER
MAX7428
SYNCIO
VCC
75
Ω
75
Ω
CIN
*
Functional Diagrams
Ordering Information
xx-xxxx; Rev 0; 2/06
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
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.
PART
TEMP
RANGE
PIN-
PACKAGE
TOP
MARK
MAX7428EKA-T
-40
°C to +85°C
8 SOT23-8
AAIU
MAX7430EUB
-40
°C to +85°C
10 MAX
—
MAX7432AEUD
-40
°C to +85°C
14 TSSOP
—
MSPB is a trademark of Maxim Integrated Products, Inc.
MAX is a registered trademark of Maxim Integrated Products, Inc.