MIC1700
Micrel
MIC1700
HDTV/SDTV 6th Order Video Filter for Component
Video plus Composite Video
General Description
Features
The MIC1700 is a complete reconstruction filter solution for
high definition set-top boxes.
• S-video (Y/C) input, S-video and summed (CV) output
• 2 YP P or RGB inputs, YP P or RGB output
R
B
R B
• YP P /RGB 2-1 input multiplexer
The device has two independent component inputs (YP P
R
B
R
B
• DC coupled inputs – AC-coupled output drive
• 6db output gain for 75Ω source termination
• Component filters selectable for SD or HD cutoffs
orRGB)selectableviaa2-to-1multiplexer, andaseparateS-
video input (Y/C). Component channel filters have a select-
able cutoff frequency (8MHz or 36MHz) to support both
standard (SD) and high definition (HD) applications. S-video
filters have fixed cutoff (8MHz) to support legacy composite
applications. In addition, S-video channels are summed to
provide a filtered CV output for an RF modulator or VCR. All
inputs are DC-coupled with a 0V to 1V peak-to-peak range.
All outputs are designed to drive 2V peak-to-peak into
AC-coupled 150Ω loads. This supports 1V peak-to-peak into
a 75Ω load with a 75Ω series source terminator.
th
• 6 order Butterworth characteristic
• Flat passband (HD 0.5dB @ 30MHz typ)
• Low group delay distortion (HD: 12ns @ 30MHz typ)
• Single 5V supply
• 28-pin wide body SOIC package (with exposed pad for
improved thermal performance)
Applications
• HDTV
• HDTV set-top boxes
• Video games
• HDTV systems
• DVD players
th
Filters have 6 order near Butterworth characteristics with
cutoffs of 8MHz (SD and CV) and 36MHz (HD). These
characteristics are chosen to provide good passband flat-
ness with sufficient stop band attenuation and minimal group
delay distortion.
• Digital satellite set-top boxes
• HDTV monitors
The device operates from a 5VDC supply.
Data sheets and support documentation are available at
Micrel’s web site, www.micrel.com.
Ordering Information
Part Number
Junction Temp. Range
Package
MIC1700BWME
0°C to +70°C
SOIC-28
Typical Application
MIC1700x-x
1
28
27
26
VCC
HSEL
Y1A
HSEL
Y1A
Y1B
PR1
PR2
GND
PB1
PB2
YIN
VCC
VCC
4.7µF
0.1µF
2
3
220µF
75Ω
Y1B
Y1OUT
PROUT
PBOUT
Y1OUT
75Ω
75Ω
4
PR1
220µF
220µF
25
PROUT
5
PR2
75Ω
75Ω
24
23
22
6
PBOUT
GND
75Ω
7
PB1
PB2
220µF
220µF
220µF
75Ω
8
YOUT
YOUT
75Ω
75Ω
9
YIN
CIN
21
Composite
Inputs
COUT
COUT
10
11
75Ω
75Ω
CIN
20
19
18
CVOUT
GND
CVOUT
GND
MUX
75Ω
12
MUX
VCC
VCC
17
GND
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
October 2003
1
MIC1700