19-3482; Rev 0; 10/04
HD/S D S w it c h a b le Vid e o Filt e rs a n d Bu ffe rs
Ge n e ra l De s c rip t io n
Fe a t u re s
The MAX7454/MAX7455 triple-channel video recon-
struction filters and buffers are ideal for high definition
(HD), standard definition progressive scan/noninter-
laced (SDp), and standard definition interlaced (SDi)
television applications. These devices are a fully inte-
grated solution for filtering and buffering HD and/or
SDp/SDi TV signals in component video output format
♦ 30MHz High Definition (HD)/10MHz Standard
Definition (SD) Switchable Video Reconstruction
Filter
♦ 15% Magnitude Response Adjustment
♦ Passband: -2.3dB at 30MHz
-0.40dB at 10MHz
(Y P
P or RGB). The MAX7454/MAX7455 are compati-
R
B
-0.10dB at 5MHz
ble with the 1080i, 720p, 480p, and 480i scanning system
standards. In addition to having an HD/SD switchable
frequency response, the magnitude response can be
optimized by approximately 15% by a control input.
♦ Stopband: -55dB at 74MHz (HDTV)
-62dB at 27MHz (SDTV)
♦ Output Blank Level <1V for DC-Coupled Output
♦ +6dB Gain (MAX7454) or +12dB Gain (MAX7455)
♦ Direct Coupled Input, Zero Tilt
The input and output signals are DC-coupled to the
MAX7454/MAX7455, eliminating the large output AC-cou-
pling capacitors normally used. The MAX7454/MAX7455
♦ Direct Coupled Output, No Large Output Capacitor
output buffers drive a 2V
video signal into a standard
P-P
♦ Drives 2V
Signal in 150Ω Video Load
P-P
150Ω load. The MAX7454 has a gain of +6dB and the
MAX7455 has a gain of +12dB. Both devices are available
in a 20-pin TSSOP package and are fully specified over
the upper commercial (0°C to +85°C) temperature range.
♦ Small 20-Pin TSSOP Package
♦ Single +5V Supply
Ord e rin g In fo rm a t io n
Ap p lic a t io n s
TEMP
BUFFER
Set-Top Boxes
PART
PIN-PACKAGE
RANGE
GAIN (dB)
Direct-Broadcast Satellite (DBS) Receiver
DVD Players
MAX7454UUP
0°C to +85°C 20 TSSOP-EP**
+6
+6
MAX7454UUP+* 0°C to +85°C 20 TSSOP-EP**
MAX7455UUP* 0°C to +85°C 20 TSSOP-EP**
MAX7455UUP+* 0°C to +85°C 20 TSSOP-EP**
Hard-Disk Recorders
HDTV (LCD, PDP, DLP)
Professional Cameras
+12
+12
+Indicates lead-free packaging.
*Future product—contact factory for availability.
**EP = Exposed pad.
Pin Configuration appears at end of data sheet.
Typ ic a l Op e ra t in g Circ u it
+5V
V
CC
MAX7454/MAX7455
ENCODER
75Ω
SWITCHABLE
LOWPASS
FILTER
Y/R
OUT1
OUT2
OUT3
IN1
IN2
IN3
+6dB OR
+12dB
D/A
D/A
D/A
Z = 75Ω
O
75Ω
2
2
75Ω
75Ω
SWITCHABLE
LOWPASS
FILTER
Pb/G
Pr/B
+6dB OR
+12dB
Z
O
= 75Ω
75Ω
SWITCHABLE
LOWPASS
FILTER
+6dB OR
+12dB
Z
O
= 75Ω
75Ω
FSEL
SD/HD
GND
________________________________________________________________ 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.