STV8223B
MULTISTANDARD VIDEO AND SOUND IF SYSTEM
WITH AUDIO AND VIDEO SWITCHES
January 1997
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
24
23
22
21
11
12
TUNER AGC STARTING POINT ADJUSTMENT
TUNER AGC OUTPUT
AGC CAPACITOR
NOT TO BE CONNECTED
IF INPUT
IF INPUT
GROUND
V
CC
EXTERNAL AUDIO INPUT
FM DEMODULATED AUDIO OUTPUT
AUDIO SWITCH OUTPUT
VOLUME CONTROL + MUTE
PIF PLL FILTER
AFC OUTPUT
CVBS OUTPUT
SWITCHING INPUT (INT/EXT)
IF LC
IF LC
AUDIO HIGH PASS FILTER
2nd IF SOUND INPUT
AUDIO AND 2nd IF DECOUPLING
INTERNAL VIDEO INPUT
VIDEO SWITCH OUTPUT
EXTERNAL VIDEO INPUT
82
23
B
-
01.
E
P
S
PIN CONNECTIONS
SHRINK24
(Plastic Package)
ORDER CODE : STV8223B
.
VIDEO PLL DEMODULATION
.
SOUND PLL DEMODULATION
.
NEGATIVE MODULATION
.
AGC FOR NEGATIVE MODULATION
.
AUDIO SWITCH
.
DC VOLUME CONTROL
.
VIDEO SWITCH
DESCRIPTION
The STV8223B is a picture and sound IF processor
for multistandard application with very few external
components and adjustments.
It provides the audio and video switches for one
SCART plug application.
1/10
TUNER
AGC
OUTPUT
AFC
OUTPUT
EXT
CVBS
SWITCHED
CVBS
CVBS
OUT
SWITCHED
AUDIO
STV8223B
Int/Ext
AUDIO
OUT
EXT
AUDIO
IF INPUT
19
16
20
22
23
24
14 13
15
7
4
11
10
3
18
17
12
5
1
6
2
PIF PLL
& AFC
VID
AMP
6dB
V
CC
WHITE NOISE
&
SPOT INVERT
LOGIC
INTERFACE
TUNER
AGC
AGC
DC
VOLUME
8
9
SIF
PLL
LIMITER
AUDIO
Vref
MUTE
SFE
5.5
SFE
6.5
82
23
B
-
02.
E
P
S
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Supply Voltage
13.5
V
Vx
Tuner AGC Voltage
V
CC
V
T
stg
Storage Temperature
-40, +150
o
C
T
oper
Operating Temperature
0, +70
o
C
822
3B
-
01.
T
B
L
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th (j-a)
Junction-ambient Thermal Resistance
Max.
75
o
C/W
82
23B
-
02.
T
B
L
STV8223B
2/10
ELECTRICAL CHARACTERISTICS
(T
amb
= 25
C, V
CC
= 9V, IF input = 10mV
RMS
sync level at B/G,
Video modulation DSB, D = 90% at B/G, f
PC
= 38.9MHz, f
SC
= 33.4MHz,
Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mV
RMS
, f
M
= 1kHz, Audio BW = 20kHz,
f =
50kHz,
Volume attenuation = 0dB, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
SUPPLY
V
CC
Supply Voltage
8
9
12.6
V
I
CC
Supply Current
I
17
, V
CC
= 9V
70
95
mA
IF AMPLIFIER
V
19-20
Input Sensitivity (RMS)
-3dB Video at Output
70
V
RMS
R
19-20
Differential Input Resistance
2
k
C
19-20
Differential Input Capacitance
2
pF
Gr
Gain Control Range
68
dB
Max Input Signal
+1dB Video at Output
180
mV
RMS
SYNCHRONOUS VIDEO DEMODULATOR
DF
PC
Vision Carrier Capture
-1.4
1.6
MHz
AFC
S2
AFC Slope
See Figure 21
0.2
A/kHz
DEMODULATED VIDEO OUTPUT (Pin 3)
V
A3
Amplitude
Top Sync to White
2
2.3
2.6
V
PP
BG vs L
Amplitude Difference
10
%
V
S3
Top Sync Level
B/G
1.6
1.9
2.2
V
Zero Carrier Level
B/G
4.4
V
BW
Bandwidth
-3dB Video Signal
7
9
MHz
Dg
Differential Gain
6
8
%
Dp
Differential Phase
3
6
Degree
Vr3c
Residual Carrier Signal (RMS Value)
1
10
mV
Vr3h
Residual 2nd Harmonic (RMS Value)
1
10
mV
I
3
Internal Bias of Emitter Follower
3
5
mA
S/N
Signal to Noise Ratio
Note 1 - Weighted CCIR-567
56
61
dB
Intermodulation 1.07MHz
Note 2
52
dB
V
WTH
White Noise Threshold Voltage
4.85
V
V
WIL
White Noise Insertion Level
3.6
V
V
BTH
Black Noise Threshold Voltage
1.3
V
V
BIL
Black Noise Insertion Level
2.5
V
AGC CIRCUIT
I
22CBG
Charging Current
550
950
1300
A
I
22DBG
Discharge Current
12
20
28
A
C/D
Charging/Discharging Ratio
45
TUNER AGC
I
23
Maximum Sinked Current
1.5
2
2.5
mA
S23
Current Slope
R
24
= 5k
100
170
230
A/dB
I
23+
Maximum Tuner Plus Sinked Current
Note 3
40
mA
Notes : 1.
S
N
=
20 log 10
V
out black white
V
N
(
mV
RMS
)
at BW = 5MHz
2. Video carrier relative level = 0dB, Chroma subcarrier level = -3.2dB, Sound carrier relative level = -20dB. AGC voltage (Pin 22)
is adjusted to get 1V
PP
signal on output (Pin 3).
3. Additional sinked current for large increasing steps of input signal when :
- Voltage Pin 22 > starting point defined Pin 24.
- Output signal (Pin 3) saturated (V
3
< V BTH in BG mode).
82
23B
-
0
3.
T
B
L
STV8223B
3/10
ELECTRICAL CHARACTERISTICS (continued)
(T
amb
= 25
C, V
CC
= 9V, IF input = 10mV
RMS
sync level at B/G,
Video modulation DSB, D = 90% at B/G, f
PC
= 38.9MHz, f
SC
= 33.4MHz,
Video BW = 5MHz, Sound carrier input : 5.5MHz, 10mV
RMS
, f
M
= 1kHz, Audio BW = 20kHz,
f =
50kHz,
Volume attenuation = 0dB, unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ. Max.
Unit
FM SOUND DEMODULATION
V
8S
Input Sensitivity
150
V
RMS
R
8
Limiter Input Resistance
600
DC Voltage (Pin 8)
4.2
V
AMR
Amplitude Modulation Rejection
Note 4
50
61
dB
SVR
Supply Voltage Rejection Ratio
Ripple signal : 100Hz, 0.5V
PP
28
33
dB
V
15
Detected Audio Output Signal
0.85
1.1
1.4
V
RMS
THD
Total Harmonic Distortion
0.2
1
%
R
15
Internal Deemphasis Resistor
600
750
900
S/N
Signal to Noise Ratio
See Note 5,
Weighted CCIR 468-4,
(quasi peak level) input Pin 8
55
60
dB
Black Picture (sync only)
Measurement between I F input
(Pins 19-20) and audio output (Pin 15)
SAW : K2955
BPF : SFE5.5MB
47
52
dB
White Picture
46
50
dB
250kHz Square Wave
47
52
dB
VOLUME CONTROL
V
C
Range
Control Range
See Figure 22
72
77
dB
AUDIO SWIT CH
R
16
Input Resistance
55
70
85
k
CRtk
Crosstalk
70
80
dB
En
Output Noise Level (Pin 14)
Weighted CCIR 468-4, V
13
= 0.5V
(quasi peak level)
70
V
EXTHD
THD on External Signal (Pin 14)
V
IN
= 2V
RMS
, Attenuation = 0dB
0.1
0.3
%
Audio Reference Voltage (Pin 9)
4.5
V
VIDEO SWITCH
V
DC 12
DC Input Level
No signal
1.6
1.9
2.2
V
V
S12
Top Sync. Clamp Level
1.8
V
V
11
DC Output Level
No signal
1.7
2
2.3
V
V
S11
Top Sync. Clamp Level
1.5
V
Crosstalk
55
dB
GEX
Gain from Ext. Input to Output
5.5
6
6.5
dB
Output Swing
4
5
V
I
12
Input Current
V
12
= V
DC12
= 1.5V
1
5
A
VBW
Bandwidth
V
IN
= 1V
PP
15
MHz
G
IN
Gain from Int. Input to Output
-0.5
0
+0.5
dB
MUTE (Pin 13)
V
TH13
Threshold Voltage Pin 13
0.2
0.3
0.4
V
CONTROL INPUT
Negative Modulation
Video : External - Audio : External
7.2
V
Negative Modulation
Video : Internal - Audio : Internal
1.8
V
Notes : 4. AMR = 20 log
V
15
(
mV
RMS
)
V
AM
(dB) where V
AM
= output amplitude in AM for f
M
= 1kHz and m = 30%
5.
S
N
=
20 log
V
15
(
mV
RMS
)
V
N
(
mV
RMS
)
(dB)
8
223
B
-
04.
T
B
L
STV8223B
4/10
3
8
223B
-
0
5
.
E
P
S
Figure 3 : CVBS Output
4
82
23
B
-
06.
E
P
S
Figure 4 : Switching Input INT/EXT
5
6
2k
2k
82
23
B
-
0
7
.
E
P
S
Figure 5 : IFLC
7
82
23
B
-
0
8
.
E
P
S
Figure 6 : Audio High Pass Filter
1
82
23
B
-
03.
E
P
S
Figure 1 : PIF PLL Filter
2
82
23B
-
0
4.
E
P
S
Figure 2 : AFC Output
INPUT/OUTPUT PIN CONFIGURATION
STV8223B
5/10
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