Datasheet STV8224B Datasheet (SGS Thomson Microelectronics)

MULTISTANDARDVIDEO AND SOUND IF SYSTEM

WITHAUDIO AND VIDEO SWITCHES

.

VIDEOPLLDEMODULATION

.

SOUNDPLLDEMODULATION

.

POSITIVEANDNEGATIVEMODULATION

.

AGC FOR BG AND L STANDARDS

.

AUDIO SWITCH

.

DC VOLUME CONTROL

.

VIDEOSWITCH

DESCRIPTION

TheSTV8224Bis a pictureandsoundIFprocessor
formultistandardapplicationwith very fewexternal
componentsand adjustments.

It provides the audio and video switches for one
SCART plug application.

AM sound demodulation is performed with the
STV8225add-on.

SHRINK24

(PlasticPackage)

ORDER CODE :

STV8224B

STV8224B

PIN CONNECTIONS

PIF PLL FILTER

AFC OUTPUT

CVBS OUTPUT

SWITCHINGINPUT (STANDARD + INT/EXT)

IF LC
IF LC

AUDIO HIGH PASS FILTER

2nd IF SOUND INPUT

AUDIO AND 2nd IF DECOUPLING

INTERNALVIDEO INPUT

VIDEO SWITCH OUTPUT

EXTERNAL VIDEO INPUT

January 1997

1
2
3
4
5
6
7
8
9
10
11
12

24

TUNER AGC STARTING POINT ADJUSTMENT

23

TUNER AGC OUTPUT

22

AGC CAPACITOR

21

AGC CAPACITOR (L STANDARD)

20

IF INPUT

19

IF INPUT

18

GROUND

17

V

CC

16

EXTERNAL AUDIO INPUT

15

FM DEMODULATEDAUDIO OUTPUT

14

AUDIO SWITCH OUTPUT

13

VOLUME CONTROL + MUTE

8224B -01.EPS

1/12

STV8224B

BLOCKDIAGRAM

AFC

OUTPUT

PIF PLL

& AFC

EXT

CVBS

6dB

V

CC

1817125162

SWITCHED

11

CVBS

10

IF INPUT

TUNER

AGC

OUTPUT

19
20

21

AGC

22
23

TUNER

AGC

24

SWITCHED

DC

VOLUME

MUTE

14 13 15 7

AUDIO

VID
AMP

16

EXT

AUDIO

AUDIO

OUT

Int/Ext

BG/L

SIF

PLL

WHITE NOISE

&

SPOT INVERT

LOGIC

INTERFACE

LIMITER

AUDIO

Vref

STV8224B

3

SFE

5.5

4

8

9

SFE

6.5

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

V

S

Vx Tuner AGC Voltage V

T

stg

T

oper

Supply Voltage 13.5 V

CC

Storage Temperature -40, +150
Operating Temperature 0, +70

CVBS

OUT

V

o

C

o

C

8224B -02.EPS

8224B-01.TBL

THERMAL DATA

Symbol Parameter Value Unit

Junction-ambient Thermal Resistance Max. 75

2/12

R

th (j-a)

o

C/W

8224B-02.TBL

STV8224B

ELECTRICAL CHARACTERISTICS

(T

=25°C, VCC= 9V,IFinput= 10mV

amb

VideomodulationDSB,D = 90%at B/G,D = 95%at L,f
VideoBW= 5MHz,Soundcarrier input: 5.5MHz,10mV
Volumeattenuation= 0dB,unlessotherwisespecified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

SUPPLY

V

I

CC

IF AMPLIFIER

V

19-20

R

19-20

C

19-20

Gr Gain Control Range 68 dB

SYNCHRONOUS VIDEO DEMODULATOR

DF

AFC

S2 AFC Slope See Figure 21 0.2 µA/kHz

DEMODULATED VIDEO OUTPUT (Pin 3)

V

BG vs L Amplitude Difference 10 %

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

S/N Signal to Noise Ratio Note 1 - Weighted CCIR-567 56 61 dB

V

WTH

V
V

BTH

V

AGC CIRCUIT (BG MODE)

I

22CBG

I

22DBG

C/D Charging/Discharging Ratio 45

Notes :

Supply Voltage 8 9 12.6 V

CC

Supply Current I17,VCC=9V 70 95 mA

Input Sensitivity (RMS) -3dB Video at Output 70 µV
Differential Input Resistance 2 kΩ
Differential Input Capacitance 2 pF

Max Input Signal +1dB Video at Output 180 mV

Vision Carrier Capture -1.4 1.6 MHz

PC

Amplitude TopSync to White 2 2.3 2.6 V

A3

Top Sync Level B/G and L 1.6 1.9 2.2 V

S3

Zero Carrier Level B/G

Internal Bias of Emitter Follower 3 5 mA

I

3

Intermodulation 1.07MHz Note 2 52 dB
White Noise Threshold Voltage 4.85 V
White Noise Insertion Level 3.6 V

WIL

Black Noise Threshold Voltage 1.3 V
Black Noise Insertion Level 2.5 V

BIL

Charging Current 550 950 1300 µA
Discharge Current 12 20 28 µA

S

=

1.

20 log 10

N

2. Video carrier relative level = 0dB, Chroma subcarrier level = -3.2dB, Sound carrier relative level = -20dB.AGC voltage (Pin 22)
is adjustedto get 1V

V

out black white

(

V

mV

N

atBW = 5MHz

)

RMS

signalon output (Pin 3).

PP

synclevelat B/G, Peak-whitelevelat L,

RMS

=38.9MHz,fSC= 33.4MHz,

PC

RMS,fM

=1kHz,AudioBW= 20kHz,∆f=±50kHz,

L

4.4

1.8

RMS

RMS

PP

V
V

8224B-03.TBL

3/12

STV8224B

ELECTRICAL CHARACTERISTICS

=25°C,VCC= 9V, IF input= 10mV

(T

amb

VideomodulationDSB,D = 90% atB/G,D = 95% at L, f
VideoBW=5MHz,Soundcarrierinput: 5.5MHz,10mV

(continued)

synclevelat B/G,Peak-whitelevelat L,

RMS

= 38.9MHz,fSC=33.4MHz,

PC

RMS,fM

=1kHz,AudioBW= 20kHz,∆f=±50kHz,

Volumeattenuation= 0dB, unlessotherwisespecified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

AGC CIRCUIT (L MODE)

I

22CL

I

22DL

I

22CL

I

22DL

TUNER AGC

I

23

S23 Current Slope R

I

23+

FM SOUND DEMODULATION

V

8S

R

AMR Amplitude Modulation Rejection Note 5 50 61 dB

SVR Supply Voltage Rejection Ratio Ripple signal : 100Hz, 0.5V

V

15

THD Total Harmonic Distortion 0.2 1 %

R

15

S/N Signal to Noise Ratio See Note 6,

Charging Current Note 3 2 3.3 4.5 mA
Discharge Current 0.3 µA

+ Additional Charging Current L in case of missing, VITS Pulses

5 µA

and no White in Video Content

Threshold Voltage Level for

Refered to Pin 3 2.75 V

Additional Charging Current

+ Additional Discharging Current 28 40 56 µA

Threshold Voltage Level for

Refered to Pin 3 2.25 V

Additional Discharging Current

Maximum Sinked Current 1.5 2 2.5 mA

=5kΩ 100 170 230 µA/dB

24

Maximum Tuner Plus Sinked

Note 4 40 mA

Current

Input Sensitivity 150 µV
Limiter Input Resistance 600 Ω

8

DC Voltage (Pin 8) 4.2 V

PP

28 33 dB

Detected AudioOutput Signal 0.85 1.1 1.4 V

Internal Deemphasis Resistor 600 750 900 Ω

55 60 dB
Weighted CCIR 468-4,
(quasi peak level) input Pin 8

Black Picture (sync only) Measurement between IF input
White Picture 46 50 dB
250kHz Square Wave 47 52 dB

(Pins19-20) and audiooutput(Pin 15)
SAW : K2955
BPF : SFE5.5MB

47 52 dB

RMS

RMS

VOLUME CONTROL

Range Control Range SeeFigure 22 72 77 dB

V

C

Notes : 3. Triggeredon white level

4. Additional sinked current forlarge increasing steps of input signal when:

- VoltagePin 22 > starting point defined Pin 24.

- Outputsignal (Pin 3) saturated(V

5. AMR = 20 log
S

6.

= 20 log

N

(mV

V

RMS

RMS

)

RMS

AM

)

(dB)

)

V

15

(mV

V

15

V

(mV

N

< V BTH inBG mode, V3> V WTH in L mode).

3

(dB) where VAM= output amplitude in AM for fM= 1kHz and m = 30%

4/12

8224B-04.TBL

STV8224B

ELECTRICAL CHARACTERISTICS

=25°C, VCC= 9V,IFinput= 10mV

(T

amb

VideomodulationDSB,D = 90%at B/G,D =95% at L, f
VideoBW= 5MHz,Soundcarrier input: 5.5MHz,10mV

(continued)

synclevelat B/G,Peak-whitelevelat L,

RMS

=38.9MHz, fSC= 33.4MHz,

PC

RMS,fM

=1kHz,AudioBW = 20kHz,∆f=±50kHz,

Volumeattenuation= 0dB, unlessotherwisespecified)

Symbol Parameter Test Conditions Min. Typ. Max. Unit

AUDIO SWITCH

R

16

CRtk Crosstalk 70 80 dB

En Output Noise Level (Pin 14) Weighted CCIR 468-4,V

EXTHD THD onExternal Signal (Pin 14) V

VIDEO SWITCH

V

DC 12

V

S12

V

11

V

S11

GEX Gain from Ext. Input to Output 5.5 6 6.5 dB

I

12

VBW Bandwidth V

G

IN

MUTE (Pin13)

V

TH13

CONTROL INPUT

Input Resistance 55 70 85 kΩ

(quasi peak level)

IN

=2V

, Attenuation = 0dB 0.1 0.3 %

RMS

13

= 0.5V

70 µV

Audio Reference Voltage (Pin 9) 4.5 V

DC Input Level No signal 1.6 1.9 2.2 V
Top Sync. Clamp Level 1.8 V
DC Output Level No signal 1.7 2 2.3 V
Top Sync. Clamp Level 1.5 V
Crosstalk 55 dB

Output Swing 4 5 V
Input Current V12=V

=1V

IN

= 1.5V 1 5 µA

DC12

PP

15 MHz

Gain from Int. Input to Output -0.5 0 +0.5 dB

Threshold Voltage Pin 13 0.2 0.3 0.4 V

Negative Modulation Video : External - Audio : External 7.2 V
Threshold 3 Level linked to V

CC

6.4 6.8 7.2 V
Positive Modulation Video : External - Audio : External 4.9 6.4 V
Threshold 2 Level linked to V

CC

4.1 4.5 4.9 V
Positive Modulation Video : Internal - Audio : External 2.6 4.1 V
Threshold 1 Level linked to V

CC

1.8 2.2 2.6 V
Negative Modulation Video : Internal - Audio : Internal 1.8 V

8224B-05.TBL

5/12

STV8224B

INPUT/OUTPUT PIN CONFIGURATION
Figure1 : PIFPLL Filter

1

Figure 2 : AFCOutput

2

8224B -03.EPS

Figure3 : CVBS Output

3

Figure5 :

56

IFLC

2kΩ 2kΩ

Figure 4 : SwitchingInput Standard+ INT/EXT

4

8224B-05.EPS

Figure 6 :

Audio High Pass Filter

7

8224B-04.EPS

8224B -06.EPS

6/12

8224B-07.EPS

8224B-08.EPS

INPUT/OUTPUT PIN CONFIGURATION (continued)
Figure7 : 2ndIF Sound Input (Pin 8)

Audio and 2

nd

IF Decoupling (Pin 9)

STV8224B

Figure 8 : InternalVideoInput

8

Figure9 :

Figure11 :

Ω

600Ω

600

VideoSwitch Output

11

VolumeControl + Mute

9

10

8224B-09.EPS

Figure 10 :

8224B-11.EPS

Figure 12 :

ExternalVideo Input

12

AudioSwitch Output

8224B-10.EPS

8224B-12.EPS

13

Figure13 : FM DemodulatedAudio Output

750

Ω

15

14

8224B-13.EPS

Figure 14 : ExternalAudio Input

16

8224B-15.EPS

8224B-14.EPS

8224B-16.EPS

7/12

STV8224B

INPUT/OUTPUT PIN CONFIGURATION (continued)
Figure15 : V

CC

Figure 16 : IF Input

Figure17 :

21

17

AGC Capacitor

15V

8224B -17.EPS

Figure 18 :

19

AGCCapacitor

22

1kΩ

1kΩ

20

8224B -18.EPS

Figure19 :

8/12

TunerAGC Output

23

8224B-19.EPS

Figure 20 :

8224B-21.EPS

8224B-20.EPS

TunerAGC Starting Point Adjustment

24

8224B-22.EPS

STV8224B

Figure21 : AFC Voltage Pin 2 vs IF Frequency

8
7
6
5
4
3
2
1

AFCVOLTAGE (PIN 2) (V)

0

38.55 38.95 39.3538.75 39.15

IF FREQUENCY(MHz)

Figure23 :

TunerAGC Output Current vs V

CurrentConversion
with 100kΩ/100kΩ Bridge

IN

(R24 is external adjustmentPin 24)

2

1.75

1.5

1.25
1

0.75

0.5

0.25
0

-1

10

TUNER AGC OUTPUT CURRENT (mA)

Figure 25 :

R24 = 1kΩ
R24 = 3kΩ
R24 = 5kΩ

11010

V (mV )

RMS

IN

2

Blackand White Noise Inverter

10

Figure 22 : Volume Control Attenuationvs V

0

-10

-20

-30

-40

-50

-60

ATTENUATION(dB)

VOLUME CONTROL

-70

-80

1.0 2.0 3.0
V (V)

8224B-23.EPS

Figure24 :

Video Signal to Noise Ratio (Pin 3)

13

as a functionof IF InputSignal
(Pins 19-20) WeightedCCIR-567

80
70
60
50
40

S/N (dB)

30
20
10

3

8224B -25.EPS

0

VIN(mV

RMS

13

4.0

)

5.0

8224B-24.EPS

1001010.10.01

8224B -30.EPS

4.85

4.2

3.6

2.5

1.9

1.3

V

(V)

3

White Spike Noise Clamp
Top White

White Noise Level Insertion
Black Noise Level Insertion

Top Synchronization
Black Spike Noise Clamp

t

8224B-26.EPS

9/12

STV8224B

APPLICATIONDIAGRAM(B/G/D/K)

STV8224B

External

Sound

C9

Input

10µF

(From SCART)

C8

R11

Demodulated

Sound

Output

(To SCART)

10µF

220Ω

Sound

Switched

C6

Output

R32

4.7µF

C7

3.3kΩ

10kΩ

68nF

+9V

P2

Volume control

CVBS

Output

Q2

BC547

R18

R12

2.2kΩ

TRAP FILTER

(5.5MHz - 6.5MHz)

(To SCART)

75Ω

R9

560Ω

L6

CF3

8.2µH

CVBS

CVBS

Input

(From SCART)

10kΩ

C31

100nF

SW1

Mute

1314

External

C30

R29

470nF

Ouput

75Ω

R10

22Ω

+9V

C27

470nF

SW4

+9V

R28

4.7kΩ

Q3

BC547

STD

R26

3.9kΩ

C24

1nF

C29

10V

BZX55C

10nF

R24

4.7kΩ

R21

C26

AGC

Q4

LC1

123456789101112

Delay

9V

C33

BC337

C25

C15

100nF

10µF

100nF

1nF

10µF

R13

DZ1

38.9MHz

330Ω

1617181920 1521222324

C21

L4

3.3µH

BGDK

FILTER

VIDEO SAW

IF1

C20

47µF

100nF

STV8224B

1µF

C18

10kΩ

P1

Tuner

C17

10nF

27kΩ

R14

1.8kΩ

D2

CF1

BFP

5.5MHz

C28

Voltage

Switching

C32

10nF

R25

2.7kΩ

R20

1kΩ

1N4148

68pF

BFP

D1

CF2

6.5MHz

R27

1N4148

1.8kΩ

R22

150Ω

10/12

Tuner AGC

C16

Output

R35

15Ω

R34

2.2µF

R15

6.8kΩ
12V

390Ω

100kΩ

AFC

R16

Output

100kΩ

8224B-27.EPS

R17

9V

APPLICATIONDIAGRAM(B/G/D/K,L)
STV8224B- STV8225

External

Sound

Input

(From SCART)

Sound

Output

(To SCART)

C9

C8

10µF

R11

10µF

220Ω

C22

C23

10µF

10µF

891011121314

Sound

Switched

C6

Output

R32

4.7µF

C7

10kΩ

68nF

STV8224B

+9V

3.3kΩ

P2

10kΩ

Volume Control

C31

1314

100nF

SW1

Mute

CVBS

External

C30

Input

(From SCART)

R29

470nF

CVBS

Ouput

75Ω

R10

+9V

C27

470nF

SW4

STD

R26

BC547

+9V

R28

4.7kΩ

Q3

CVBS

Output

(to SCART)

Ω

75

R18

22Ω

Q2

R9

R12

2.2kΩ

TRAP FILTER

(5.5MHz - 6.5MHz)

560Ω

CF3

L6

8.2µH

BC547

3.9kΩ

C11

L7

D2

CF1

5.5MHz

C28

R16

Output

R25

2.7kΩ

1.8kΩ
R20

1kΩ

1N4148

BFP

6.5MHz

68pF

Voltage

Switching

Ω

100k

D1

CF2

R27

1N4148

Ω

1.8k

R22

150Ω

8224B-28.EPS

C24

1nF

38.9MHz
C29

330Ω

BZX55C

10V

9V

10nF

R17

R24

100kΩ

C32

4.7kΩ
R21

BFP

10nF

AFC

C26

AGC

Q4

R35

12V

123456789101112

Delay

9V

BC337

15Ω

LC1

C33

C25

C15

10µF

100nF

10µF

100nF

1nF

R34

R13

DZ1

390Ω

C20

C19

C18

Tuner AGC

100nF

47nF

1µF

C17

R14

C16

Output

P1

10nF

27kΩ

47µF

1617181920 1521222324

10kΩ

IC2 STV8224B

Tuner

R15

6.8kΩ

Level

C12

47µF

3.3µH

100nF

C10

22µF

SOUND SAW

L STD

FILTER

IF2

IC1 STV8225

Switch

C21

47µF

C13

10µF

1234567

L4

3.3µH

BGDKL

FILTER

VIDEO SAW

IF1

11/12

STV8224B

PACKAGE MECHANICAL DATA

24 PINS - PLASTICSHRINK DIP

BeB1

E

E1

A2

A1

LA

Stand-off

c

D

e1
e2

E

13

F

12

SDIP24

e3
e2

.015
0,38

Gage Plane

Dimensions

24

1

Millimeters Inches

Min. Typ. Max. Min. Typ. Max.

A 5.08 0.20

A1 0.51 0.020

3.05 3.30 4.57 0.120 0.130 0.180

B 0.36 0.46 0.56 0.0142 0.0181 0.0220

B1 0.76 1.02 1.14 0.030 0.040 0.045

C 0.23 0.25 0.38 0.0090 0.0098 0.0150
D 22.61 22.86 23.11 0.890 0.90 0.910
E 7.62 8.64 0.30 0.340

E1 6.10 6.40 6.86 0.240 0.252 0270

e 1.778 0.070
e1 7.62 0.30
e2 10.92 0.430
e3 1.52 0.060

L 2.54 3.30 3.81 0.10 0.130 0.150

Informationfurnishedisbelieved to be accurate and reliable.However,SGS-THOMSON Microelectronics assumesno responsibility
for theconsequences of use of such information nor for any infringement of patentsor other rights of third parties which may result
from its use.Nolicence is grantedbyimplication orotherwise underany patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
informationpreviouslysupplied. SGS-THOMSONMicroelectronicsproducts arenotauthorized for use as criticalcomponents in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.

PMSDIP24.EPS

SDIP24.TB L

12/12

1997 SGS-THOMSONMicroelectronics - AllRights Reserved



Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips

2

C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to

I

2

the I

C Standard Specifications as defined by Philips.

SGS-THOMSON Microelectronics GROUP OF COMPANIES

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