SM5301AS
3-channel Video Buffer with Built-in Wideband Filters
OVERVIEW
The SM5301AS is a video buffer with built-in video signal bandwidth lowpass filter. The filter employs a 5-
order Butterworth lowpass filter configuration. The filter characteristics have been optimized for minimal over-
shoot and flat group delay, it has a variable cutoff frequency and guaranteed driver-stage channel gain differ-
ence and phase difference values.
FEATURES
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PINOUT
(Top view)
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Supply voltage: 5V
±
10%
VESA-standard ATSC digital TV RGB/YUV
video filters
2-system input/1-system output switching analog
multiplexer function
DC voltage level restore sync clamp function
Output buffer gain switching function: 0, 6dB
(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: 5.8 to 37MHz variable
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
NC
DISABLE
GND3
B
OUT
/V
OUT
VCC3
GND2
G
OUT
/U
OUT
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
SYNCIN
MUXSEL
GND
VFC
RFC
GND4
VCC1
R
OUT
/Y
OUT
GND1
VCC2
8
9
10
11
12
13
14
21
20
19
18
17
16
15
APPLICATIONS
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Set-top boxes
Digital television
DVD players
Projector
ORDERING INFORMATION
Device
SM5301AS
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
NIPPON PRECISION CIRCUITS INC.—1
0.1 ± 0.05
0.5 ± 0.2
SM5301AS
BLOCK DIAGRAM
VCC1
VCC2
VCC3
VCC4
DISABLE
R
INA
/Y
INA
MUX
R
INB
/Y
INB
DC
Restore
LPF
Buffer
R
OUT
/Y
OUT
GSR1
G
INA
/U
INA
MUX
G
INB
/U
INB
DC
Restore
LPF
Buffer
G
OUT
/U
OUT
GSG1
B
INA
/V
INA
MUX
B
INB
/V
INB
MUXSEL
SYNCIN
DC
Restore
LPF
Buffer
B
OUT
/V
OUT
GSB1
IFC
Control
RFC
GND1
GND2
GND3
GND4
VFC
NIPPON PRECISION CIRCUITS INC.—2
SM5301AS
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Name
G
INA
/U
INA
GSG1
G
INB
/U
INB
NC
B
INA
/V
INA
GSB1
B
INB
/V
INB
NC
DISABLE
GND3
B
OUT
/V
OUT
VCC3
GND2
G
OUT
/U
OUT
VCC2
GND1
R
OUT
/Y
OUT
VCC1
GND4
RFC
VFC
MUXSEL
SYNCIN
VCC4
R
INA
/Y
INA
GSR1
R
INB
/Y
INB
NC
I/O
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–
I
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–
I
−
O
−
−
O
−
−
O
−
−
−
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−
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–
Description
Analog G
INA
or U
INA
signal input. Sync signal is input on SYNCIN pin.
G
OUT
/U
OUT
output buffer gain set input
Analog G
INB
or U
INB
signal input. Sync signal is input on SYNCIN pin.
No connection (leave open or connect to ground)
Analog B
INA
or V
INA
signal input. Sync signal is input on SYNCIN pin.
B
OUT
/V
OUT
output buffer gain set input
Analog B
INB
or V
INB
signal input. Sync signal is input on SYNCIN pin.
No connection (leave open or connect to ground)
Power save function. Built-in pull-down resistor.
L: Enable
H: Disable (Output pins: R
OUT
/Y
OUT
, G
OUT
/U
OUT
, and B
OUT
/V
OUT
are high impedance.)
Analog ground
B/V signal output
Analog 5V supply
Analog ground
G/U signal output
Analog 5V supply
Analog ground
R/Y signal output
Analog 5V supply
Analog ground
LPF (lowpass filter) cutoff frequency setting resistor connection
LPF (lowpass filter) cutoff frequency setting voltage input
Input select signal. Built-in pull-down resistor.
L:
×
INA
pin select
H:
×
INB
pin select
Filter channel external H-Sync signal input. Active “H”. Built-in pull-down resistor.
Analog 5V supply
Analog R
INA
or Y
INA
signal input. Sync signal is input on SYNCIN pin.
R
OUT
/Y
OUT
output buffer gain set input
Analog R
INB
or Y
INB
signal input. Sync signal is input on SYNCIN pin.
No connection (leave open or connect to ground)
NIPPON PRECISION CIRCUITS INC.—3
SM5301AS
SPECIFICATIONS
Absolute Maximum Ratings
Parameter
Supply voltage range
Storage temperature range
Power dissipation 1
1
Power dissipation 2
2
Symbol
V
CC
T
stg
P
D1
P
D2
Rating
−
0.3 to 7.0
−
55 to
+
125
1.0
0.9
Unit
V
°C
W
W
1. When mounted on a substrate: mounted on a 111
×
80
×
1.6mm glass-epoxy substrate with 90%
copper (Cu) wiring factor, 0m/s air flow, and Ta = – 25 to 70
°C.
2. When mounted on a substrate: mounted on a 111
×
80
×
1.6mm glass-epoxy substrate with 90%
copper (Cu) wiring factor, 0m/s air flow, and Ta = 70 to 80
°C.
Recommended Operating Conditions
Parameter
Supply voltage ranges
Operating temperature range
Symbol
V
CC
Ta
Rating
4.5 to 5.5
– 25 to 85
Unit
V
°C
Electrical Characteristics
V
CC
= 4.5 to 5.5V, Ta = – 25 to 85°C unless otherwise noted.
Rating
Parameter
Symbol
Condition
min
Supply current 1
I
CC1
V
CC
=
5.5V, RFC = 820Ω to GND,
VFC
=
0.2V (fc
=
5MHz),
DISABLE
=
"L"
V
CC
=
5.5V, RFC = 820Ω to GND,
VFC
=
1.6V (fc
=
40MHz),
DISABLE
=
"L"
V
CC
=
5.5V, RFC = 820Ω to GND,
VFC
=
0.2V (fc
=
40MHz),
DISABLE
=
"H"
Error entered around table 1 values,
Ta = 0 to 70°C, V
CC
=
4.75 to 5.25V
Error entered around table 1 values,
Ta = – 25 to 85°C
RL
=
75Ω to GND, 6dB gain setting
R
INA
/Y
INA
, R
INB
/Y
INB
, G
INA
/U
INA
,
G
INB
/U
INB
, B
INA
/V
INA
, B
INB
/V
INB
Time for 90% output signal change
for 10mV input signal, C
IN
=
0.1µF
AC coupling, 6dB gain setting
2Vp-p output pulse
B
OUT
/V
OUT
, G
OUT
/U
OUT
, R
OUT
/Y
OUT
one load unit
=
150Ω
Between R/G/B, fc/2 [Hz]
70
typ
100
max
130
mA
Unit
Test
level
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Supply current 2
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CC2
90
120
160
mA
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Supply current 3
I
CC3
∆A
V1
∆
A
V2
V
out2
R
IN1
T
clamp
V
I
V
OS
C
L
RL
dG
1
2.5
5
mA
I
Output gain error 1
Output gain error 2
Output voltage
DISABLE-mode input impedance
(pull-down)
Clamp response time
Maximum input amplitude
Maximum overshoot
Maximum load capacitance
Output drive load
Channel-to-channel gain
difference
– 0.5
–1
2.4
–
–
–
–
–
–
–
–
–
–
50
8
–
10
–
–
–
+
0.5
+
1
–
–
–
1.4
–
15
2
0.5
dB
dB
Vp-p
kΩ
ms
Vp-p
%
pF
load
dB
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II
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II
II
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NIPPON PRECISION CIRCUITS INC.—4
SM5301AS
Rating
Parameter
Channel-to-channel phase
difference
Output harmonic distortion
Power supply rejection ratio
Output short-circuit current
Logic HIGH-level input voltage 1
Logic LOW-level input voltage 1
Logic HIGH-level input voltage 2
Logic LOW-level input voltage 2
Logic pull-up resistance
Logic pull-down resistance
Symbol
Condition
min
typ
3.5
1.5
35
–
–
–
–
–
40
50
max
–
–
–
100
–
1.0
–
0.5
–
–
degree
%
dB
mA
V
V
V
V
kΩ
kΩ
Unit
Test
level
II
II
II
II
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dφ
T
HD
PSRR
I
SC
V
IH1
V
IL1
V
IH2
V
IL2
R
IN2
R
IN3
Between R/G/B, fc/2 [Hz]
Vout
=
2Vp-p, f
=
1MHz
V
CC
=
0.5Vp-p, f
=
100kHz
–
–
–
–
DISABLE, MUXSEL, SYNCIN
DISABLE, MUXSEL, SYNCIN
GSB1, GSG1, GSR1
GSB1, GSG1, GSR1
GSB1, GSG1, GSR1
DISABLE, MUXSEL, SYNCIN
2.5
–
V
CC
−
0.5
–
–
–
Filter Characteristics
V
CC
= 4.5 to 5.5V, Ta = – 25 to 85°C unless otherwise noted.
Rating
Parameter
Cutoff frequency adjustment
range
Cutoff frequency error
4fc attenuation
Output noise characteristic
Crosstalk
Multiplexer crosstalk
Channel-to-channel group delay
Symbol
Condition
min
F
C
∆F
C
f
SB
V
NOISE
X
TALK
X
TALK
T
PD
∆T
PD1
Ta=25°C (see figure 1)
Ta
=
25°C, V
CC
=
5.0V
fIN
≥
4fc
10kHz to 40MHz, 6dB output gain
setting
Between 2 channels with input
0.5Vp-p 1MHz
Between MUX A−B
Each input = 500kHz
Fc
=
6.7MHz
(500kHz)
to 3.58MHz
to 4.43MHz
to 3.58MHz
Group delay variation
∆T
PD2
Fc
=
24MHz
(500kHz)
to 4.43MHz
to 10MHz
∆T
PD3
VFC input voltage range
VFC
Fc
=
36MHz
(1MHz)
to 10MHz
to 30MHz
5.8
–
–
–
–
–
–
–
–
–
–
–
–
–
0.2
typ
–
–
50
1.0
−
47
−
49
10
9
15
1
1
2
0.5
5
–
max
37
±
20
–
–
–
–
–
–
–
–
–
–
–
–
1.6
MHz
%
dB
mV
RMS
dB
dB
ns
ns
ns
ns
ns
ns
ns
ns
V
Unit
Test
level
I
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II
II
II
II
II
II
II
II
II
II
II
II
I
Test level
I : 100% of products tested at Ta = + 25°C.
II : Guaranteed as result of design and characteristics evaluation.
NIPPON PRECISION CIRCUITS INC.—5
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