SM5301BS
3-channel Video Buffer with Built-in Wideband Filters
with Filter Through Function
OVERVIEW
The SM5301BS is a video filter LSI with buffered outputs for VESA-standard ATSC digital TV. The filter
employs a 5-order Butterworth lowpass filter configuration. The filter characteristics have been optimized for
minimal overshoot and flat group delay, it has a variable cutoff frequency and guaranteed output buffer-stage
channel gain difference and phase difference values. It has also filter through mode.
FEATURES
I
I
PINOUT
(Top view)
I
I
I
I
I
I
I
I
I
Supply voltage: 5V
±
10%
VESA-standard ATSC digital TV RGB/YUV
video filters
RGB/YUV switching multiplexer function
Synctip clamp input
0dB, 6dB gain switching function
(input-to-output AC signal gain)
Channel-to-channel gain difference: 0.5dB (
±
5%
supply voltage variation)
Channel-to-channel phase difference: 3.5 degree
Output signal harmonic distortion (all channels):
1.5%
Cutoff frequency: 5 to 37MHz variable
Filter through mode
(passband frequency is 46MHz, when gain is 6dB)
Package: 28-pin HSOP (Pb free)
G
INA
/U
INA
GSG1
G
INB
/U
INB
NC
B
INA
/V
INA
GSB1
B
INB
/V
INB
GND
1
2
3
4
5
6
7
28
27
26
25
24
23
22
NC
R
INB
/Y
INB
GSR1
R
INA
/Y
INA
VCC4
THROUGH
MUXSEL
GND
NC
DISABLE
GND3
B
OUT
/V
OUT
VCC3
GND2
G
OUT
/U
OUT
8
9
10
11
12
13
14
21
20
19
18
17
16
15
VFC
RFC
GND4
VCC1
R
OUT
/Y
OUT
GND1
VCC2
APPLICATIONS
I
I
I
Set-top boxes
Digital television
DVD players
ORDERING INFORMATION
Device
SM5301BS
Package
28-pin HSOP
PACKAGE DIMENSIONS
(Unit: mm)
+ 0.1
0.15 – 0.05
7.5 ± 0.2
9.9 ± 0.3
18.6 ± 0.3
2.2 ± 0.1
1.3TYP
0 to 10
0.8
5.15
0.10
0.35 ± 0.05
0.12
M
SEIKO NPC CORPORATION —1
0.1 ± 0.05
0.5 ± 0.2
NPC [ NIPPON PRECISION CIRCUITS INC ]
