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MAX7455

更新时间： 2024-11-24 04:41:43
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
8页 145K
描述
HD/SD Switchable Video Filters and Buffers

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MAX7455 数据手册

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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.  
12345678

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